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HBASE-17508 Unify the implementation of small scan and regular scan for sync client

This commit is contained in:
zhangduo 2017-02-04 21:14:31 +08:00
parent fb1239766d
commit 4456d22859
31 changed files with 1310 additions and 2003 deletions
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305
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
View File

@ -17,6 +17,7 @@
*/
package org.apache.hadoop.hbase.client;
import static org.apache.hadoop.hbase.client.ConnectionUtils.*;
import com.google.common.annotations.VisibleForTesting;
import java.io.IOException;
@ -27,6 +28,7 @@ import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import org.apache.commons.lang.mutable.MutableBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
@ -42,6 +44,7 @@ import org.apache.hadoop.hbase.NotServingRegionException;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.UnknownScannerException;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.client.ScannerCallable.MoreResults;
import org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;
import org.apache.hadoop.hbase.exceptions.ScannerResetException;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
@ -57,9 +60,7 @@ import org.apache.hadoop.hbase.util.Bytes;
@InterfaceAudience.Private
public class ClientScanner extends AbstractClientScanner {
private static final Log LOG = LogFactory.getLog(ClientScanner.class);
// A byte array in which all elements are the max byte, and it is used to
// construct closest front row
static byte[] MAX_BYTE_ARRAY = Bytes.createMaxByteArray(9);
protected Scan scan;
protected boolean closed = false;
// Current region scanner is against. Gets cleared if current region goes
@ -156,12 +157,6 @@ public class ClientScanner extends AbstractClientScanner {
this.rpcControllerFactory = controllerFactory;
this.conf = conf;
initializeScannerInConstruction();
}
protected void initializeScannerInConstruction() throws IOException {
// initialize the scanner
nextScanner(this.caching, false);
}
protected ClusterConnection getConnection() {
@ -242,31 +237,30 @@ public class ClientScanner extends AbstractClientScanner {
this.callable = null;
}
}
/*
/**
* Gets a scanner for the next region. If this.currentRegion != null, then we will move to the
* endrow of this.currentRegion. Else we will get scanner at the scan.getStartRow(). We will go no
* further, just tidy up outstanding scanners, if <code>currentRegion != null</code> and
* <code>done</code> is true.
* @param nbRows
* @param done Server-side says we're done scanning.
* endrow of this.currentRegion. Else we will get scanner at the scan.getStartRow().
* @param nbRows the caching option of the scan
* @return the results fetched when open scanner, or null which means terminate the scan.
*/
protected boolean nextScanner(int nbRows, final boolean done) throws IOException {
protected Result[] nextScanner(int nbRows) throws IOException {
// Close the previous scanner if it's open
closeScanner();
// Where to start the next scanner
byte[] localStartKey;
// if we're at end of table, close and return false to stop iterating
// if we're at end of table, close and return null to stop iterating
if (this.currentRegion != null) {
byte[] endKey = this.currentRegion.getEndKey();
if (endKey == null || Bytes.equals(endKey, HConstants.EMPTY_BYTE_ARRAY)
|| checkScanStopRow(endKey) || done) {
if (endKey == null || Bytes.equals(endKey, HConstants.EMPTY_BYTE_ARRAY) ||
checkScanStopRow(endKey)) {
close();
if (LOG.isTraceEnabled()) {
LOG.trace("Finished " + this.currentRegion);
}
return false;
return null;
}
localStartKey = endKey;
// clear mvcc read point if we are going to switch regions
@ -287,16 +281,23 @@ public class ClientScanner extends AbstractClientScanner {
callable = getScannerCallable(localStartKey, nbRows);
// Open a scanner on the region server starting at the
// beginning of the region
call(callable, caller, scannerTimeout);
Result[] rrs = call(callable, caller, scannerTimeout);
this.currentRegion = callable.getHRegionInfo();
if (this.scanMetrics != null) {
this.scanMetrics.countOfRegions.incrementAndGet();
}
if (rrs != null && rrs.length == 0 && callable.moreResultsForScan() == MoreResults.NO) {
// no results for the scan, return null to terminate the scan.
closed = true;
callable = null;
currentRegion = null;
return null;
}
return rrs;
} catch (IOException e) {
close();
closeScanner();
throw e;
}
return true;
}
@VisibleForTesting
@ -304,9 +305,8 @@ public class ClientScanner extends AbstractClientScanner {
return callable.isAnyRPCcancelled();
}
Result[] call(ScannerCallableWithReplicas callable,
RpcRetryingCaller<Result[]> caller, int scannerTimeout)
throws IOException, RuntimeException {
private Result[] call(ScannerCallableWithReplicas callable, RpcRetryingCaller<Result[]> caller,
int scannerTimeout) throws IOException {
if (Thread.interrupted()) {
throw new InterruptedIOException();
}
@ -369,22 +369,19 @@ public class ClientScanner extends AbstractClientScanner {
return cache != null ? cache.size() : 0;
}
private boolean scanExhausted(Result[] values) {
// This means the server tells us the whole scan operation is done. Usually decided by filter or
// limit.
return values == null || callable.moreResultsForScan() == MoreResults.NO;
}
private boolean regionExhausted(Result[] values) {
// This means the server tells us the whole scan operation is done. Usually decided by filter.
if (values == null) {
return true;
}
// Not a heartbeat message and we get nothing, this means the region is exhausted
if (values.length == 0 && !callable.isHeartbeatMessage()) {
return true;
}
// Server tells us that it has no more results for this region. Notice that this flag is get
// from the ScanResponse.getMoreResultsInRegion, not ScanResponse.getMoreResults. If the latter
// one is false then we will get a null values and quit in the first condition of this method.
if (callable.hasMoreResultsContext() && !callable.getServerHasMoreResults()) {
return true;
}
return false;
// 1. Not a heartbeat message and we get nothing, this means the region is exhausted. And in the
// old time we always return empty result for a open scanner operation so we add a check here to
// keep compatible with the old logic. Should remove the isOpenScanner in the future.
// 2. Server tells us that it has no more results for this region.
return (values.length == 0 && !callable.isHeartbeatMessage() && !callable.isOpenScanner())
|| callable.moreResultsInRegion() == MoreResults.NO;
}
private void closeScannerIfExhausted(boolean exhausted) throws IOException {
@ -400,16 +397,87 @@ public class ClientScanner extends AbstractClientScanner {
}
}
private Result[] nextScannerWithRetries(int nbRows) throws IOException {
for (;;) {
try {
return nextScanner(nbRows);
} catch (DoNotRetryIOException e) {
handleScanError(e, null);
}
}
}
private void handleScanError(DoNotRetryIOException e,
MutableBoolean retryAfterOutOfOrderException) throws DoNotRetryIOException {
// An exception was thrown which makes any partial results that we were collecting
// invalid. The scanner will need to be reset to the beginning of a row.
clearPartialResults();
// DNRIOEs are thrown to make us break out of retries. Some types of DNRIOEs want us
// to reset the scanner and come back in again.
// If exception is any but the list below throw it back to the client; else setup
// the scanner and retry.
Throwable cause = e.getCause();
if ((cause != null && cause instanceof NotServingRegionException) ||
(cause != null && cause instanceof RegionServerStoppedException) ||
e instanceof OutOfOrderScannerNextException || e instanceof UnknownScannerException ||
e instanceof ScannerResetException) {
// Pass. It is easier writing the if loop test as list of what is allowed rather than
// as a list of what is not allowed... so if in here, it means we do not throw.
} else {
throw e;
}
// Else, its signal from depths of ScannerCallable that we need to reset the scanner.
if (this.lastResult != null) {
// The region has moved. We need to open a brand new scanner at the new location.
// Reset the startRow to the row we've seen last so that the new scanner starts at
// the correct row. Otherwise we may see previously returned rows again.
// (ScannerCallable by now has "relocated" the correct region)
if (!this.lastResult.isPartial() && scan.getBatch() < 0) {
if (scan.isReversed()) {
scan.setStartRow(createClosestRowBefore(lastResult.getRow()));
} else {
scan.setStartRow(createClosestRowAfter(lastResult.getRow()));
}
} else {
// we need rescan this row because we only loaded partial row before
scan.setStartRow(lastResult.getRow());
}
}
if (e instanceof OutOfOrderScannerNextException) {
if (retryAfterOutOfOrderException != null) {
if (retryAfterOutOfOrderException.isTrue()) {
retryAfterOutOfOrderException.setValue(false);
} else {
// TODO: Why wrap this in a DNRIOE when it already is a DNRIOE?
throw new DoNotRetryIOException(
"Failed after retry of OutOfOrderScannerNextException: was there a rpc timeout?", e);
}
}
}
// Clear region.
this.currentRegion = null;
// Set this to zero so we don't try and do an rpc and close on remote server when
// the exception we got was UnknownScanner or the Server is going down.
callable = null;
}
/**
* Contact the servers to load more {@link Result}s in the cache.
*/
protected void loadCache() throws IOException {
// check if scanner was closed during previous prefetch
if (closed) {
return;
}
Result[] values = null;
long remainingResultSize = maxScannerResultSize;
int countdown = this.caching;
// This is possible if we just stopped at the boundary of a region in the previous call.
if (callable == null) {
if (!nextScanner(countdown, false)) {
values = nextScannerWithRetries(countdown);
if (values == null) {
return;
}
}
@ -417,80 +485,39 @@ public class ClientScanner extends AbstractClientScanner {
callable.setCaching(this.caching);
// This flag is set when we want to skip the result returned. We do
// this when we reset scanner because it split under us.
boolean retryAfterOutOfOrderException = true;
MutableBoolean retryAfterOutOfOrderException = new MutableBoolean(true);
for (;;) {
try {
// Server returns a null values if scanning is to stop. Else,
// returns an empty array if scanning is to go on and we've just
// exhausted current region.
values = call(callable, caller, scannerTimeout);
// now we will also fetch data when openScanner, so do not make a next call again if values
// is already non-null.
if (values == null) {
values = call(callable, caller, scannerTimeout);
}
// When the replica switch happens, we need to do certain operations again.
// The callable will openScanner with the right startkey but we need to pick up
// from there. Bypass the rest of the loop and let the catch-up happen in the beginning
// of the loop as it happens for the cases where we see exceptions.
// Since only openScanner would have happened, values would be null
if (values == null && callable.switchedToADifferentReplica()) {
if (callable.switchedToADifferentReplica()) {
// Any accumulated partial results are no longer valid since the callable will
// openScanner with the correct startkey and we must pick up from there
clearPartialResults();
this.currentRegion = callable.getHRegionInfo();
continue;
}
retryAfterOutOfOrderException = true;
} catch (DoNotRetryIOException | NeedUnmanagedConnectionException e) {
// An exception was thrown which makes any partial results that we were collecting
// invalid. The scanner will need to be reset to the beginning of a row.
clearPartialResults();
// DNRIOEs are thrown to make us break out of retries. Some types of DNRIOEs want us
// to reset the scanner and come back in again.
// If exception is any but the list below throw it back to the client; else setup
// the scanner and retry.
Throwable cause = e.getCause();
if ((cause != null && cause instanceof NotServingRegionException) ||
(cause != null && cause instanceof RegionServerStoppedException) ||
e instanceof OutOfOrderScannerNextException ||
e instanceof UnknownScannerException ||
e instanceof ScannerResetException) {
// Pass. It is easier writing the if loop test as list of what is allowed rather than
// as a list of what is not allowed... so if in here, it means we do not throw.
} else {
throw e;
}
// Else, its signal from depths of ScannerCallable that we need to reset the scanner.
if (this.lastResult != null) {
// The region has moved. We need to open a brand new scanner at the new location.
// Reset the startRow to the row we've seen last so that the new scanner starts at
// the correct row. Otherwise we may see previously returned rows again.
// (ScannerCallable by now has "relocated" the correct region)
if (!this.lastResult.isPartial() && scan.getBatch() < 0) {
if (scan.isReversed()) {
scan.setStartRow(createClosestRowBefore(lastResult.getRow()));
} else {
scan.setStartRow(Bytes.add(lastResult.getRow(), new byte[1]));
}
} else {
// we need rescan this row because we only loaded partial row before
scan.setStartRow(lastResult.getRow());
// Now we will also fetch data when openScanner so usually we should not get a null
// result, but at some places we still use null to indicate the scan is terminated, so add
// a sanity check here. Should be removed later.
if (values == null) {
continue;
}
}
if (e instanceof OutOfOrderScannerNextException) {
if (retryAfterOutOfOrderException) {
retryAfterOutOfOrderException = false;
} else {
// TODO: Why wrap this in a DNRIOE when it already is a DNRIOE?
throw new DoNotRetryIOException("Failed after retry of " +
"OutOfOrderScannerNextException: was there a rpc timeout?", e);
}
}
// Clear region.
this.currentRegion = null;
// Set this to zero so we don't try and do an rpc and close on remote server when
// the exception we got was UnknownScanner or the Server is going down.
callable = null;
retryAfterOutOfOrderException.setValue(true);
} catch (DoNotRetryIOException e) {
handleScanError(e, retryAfterOutOfOrderException);
// reopen the scanner
if (!nextScanner(countdown, false)) {
values = nextScannerWithRetries(countdown);
if (values == null) {
break;
}
continue;
@ -523,8 +550,18 @@ public class ClientScanner extends AbstractClientScanner {
this.lastCellLoadedToCache = null;
}
}
if (scan.getLimit() > 0) {
int limit = scan.getLimit() - resultsToAddToCache.size();
assert limit >= 0;
scan.setLimit(limit);
}
}
boolean exhausted = regionExhausted(values);
if (scanExhausted(values)) {
closeScanner();
closed = true;
break;
}
boolean regionExhausted = regionExhausted(values);
if (callable.isHeartbeatMessage()) {
if (!cache.isEmpty()) {
// Caller of this method just wants a Result. If we see a heartbeat message, it means
@ -542,12 +579,12 @@ public class ClientScanner extends AbstractClientScanner {
}
if (countdown <= 0) {
// we have enough result.
closeScannerIfExhausted(exhausted);
closeScannerIfExhausted(regionExhausted);
break;
}
if (remainingResultSize <= 0) {
if (!cache.isEmpty()) {
closeScannerIfExhausted(exhausted);
closeScannerIfExhausted(regionExhausted);
break;
} else {
// we have reached the max result size but we still can not find anything to return to the
@ -556,17 +593,21 @@ public class ClientScanner extends AbstractClientScanner {
}
}
// we are done with the current region
if (exhausted) {
if (regionExhausted) {
if (!partialResults.isEmpty()) {
// XXX: continue if there are partial results. But in fact server should not set
// hasMoreResults to false if there are partial results.
LOG.warn("Server tells us there is no more results for this region but we still have"
+ " partialResults, this should not happen, retry on the current scanner anyway");
values = null; // reset values for the next call
continue;
}
if (!nextScanner(countdown, values == null)) {
values = nextScannerWithRetries(countdown);
if (values == null) {
break;
}
} else {
values = null; // reset values for the next call
}
}
}
@ -738,46 +779,24 @@ public class ClientScanner extends AbstractClientScanner {
}
}
@Override
public void close() {
if (!scanMetricsPublished) writeScanMetrics();
if (callable != null) {
callable.setClose();
try {
call(callable, caller, scannerTimeout);
} catch (UnknownScannerException e) {
// We used to catch this error, interpret, and rethrow. However, we
// have since decided that it's not nice for a scanner's close to
// throw exceptions. Chances are it was just due to lease time out.
} catch (IOException e) {
/* An exception other than UnknownScanner is unexpected. */
LOG.warn("scanner failed to close. Exception follows: " + e);
}
callable = null;
@Override
public void close() {
if (!scanMetricsPublished) writeScanMetrics();
if (callable != null) {
callable.setClose();
try {
call(callable, caller, scannerTimeout);
} catch (UnknownScannerException e) {
// We used to catch this error, interpret, and rethrow. However, we
// have since decided that it's not nice for a scanner's close to
// throw exceptions. Chances are it was just due to lease time out.
} catch (IOException e) {
/* An exception other than UnknownScanner is unexpected. */
LOG.warn("scanner failed to close. Exception follows: " + e);
}
closed = true;
}
/**
* Create the closest row before the specified row
* @param row
* @return a new byte array which is the closest front row of the specified one
*/
protected static byte[] createClosestRowBefore(byte[] row) {
if (row == null) {
throw new IllegalArgumentException("The passed row is empty");
}
if (Bytes.equals(row, HConstants.EMPTY_BYTE_ARRAY)) {
return MAX_BYTE_ARRAY;
}
if (row[row.length - 1] == 0) {
return Arrays.copyOf(row, row.length - 1);
} else {
byte[] closestFrontRow = Arrays.copyOf(row, row.length);
closestFrontRow[row.length - 1] = (byte) ((closestFrontRow[row.length - 1] & 0xff) - 1);
closestFrontRow = Bytes.add(closestFrontRow, MAX_BYTE_ARRAY);
return closestFrontRow;
callable = null;
}
closed = true;
}
@Override

345
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientSmallReversedScanner.java
View File

@ -1,345 +0,0 @@
/**
* Copyright The Apache Software Foundation
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with this
* work for additional information regarding copyright ownership. The ASF
* licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package org.apache.hadoop.hbase.client;
import com.google.protobuf.ServiceException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.ClientSmallScanner.SmallScannerCallable;
import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.protobuf.RequestConverter;
import org.apache.hadoop.hbase.protobuf.ResponseConverter;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos;
import org.apache.hadoop.hbase.util.Bytes;
import com.google.common.annotations.VisibleForTesting;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.util.concurrent.ExecutorService;
/**
* <p>
* Client scanner for small reversed scan. Generally, only one RPC is called to fetch the
* scan results, unless the results cross multiple regions or the row count of
* results exceed the caching.
* </p>
* For small scan, it will get better performance than {@link ReversedClientScanner}
*/
@InterfaceAudience.Private
public class ClientSmallReversedScanner extends ReversedClientScanner {
private static final Log LOG = LogFactory.getLog(ClientSmallReversedScanner.class);
private ScannerCallableWithReplicas smallReversedScanCallable = null;
private SmallReversedScannerCallableFactory callableFactory;
/**
* Create a new ReversibleClientScanner for the specified table. Take note that the passed
* {@link Scan} 's start row maybe changed changed.
*
* @param conf
* The {@link Configuration} to use.
* @param scan
* {@link Scan} to use in this scanner
* @param tableName
* The table that we wish to rangeGet
* @param connection
* Connection identifying the cluster
* @param rpcFactory
* Factory used to create the {@link RpcRetryingCaller}
* @param controllerFactory
* Factory used to access RPC payloads
* @param pool
* Threadpool for RPC threads
* @param primaryOperationTimeout
* Call timeout
* @throws IOException
* If the remote call fails
*/
public ClientSmallReversedScanner(final Configuration conf, final Scan scan,
final TableName tableName, ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout)
throws IOException {
this(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
primaryOperationTimeout, new SmallReversedScannerCallableFactory());
}
/**
* Create a new ReversibleClientScanner for the specified table. Take note that the passed
* {@link Scan}'s start row may be changed.
*
* @param conf
* The {@link Configuration} to use.
* @param scan
* {@link Scan} to use in this scanner
* @param tableName
* The table that we wish to rangeGet
* @param connection
* Connection identifying the cluster
* @param rpcFactory
* Factory used to create the {@link RpcRetryingCaller}
* @param controllerFactory
* Factory used to access RPC payloads
* @param pool
* Threadpool for RPC threads
* @param primaryOperationTimeout
* Call timeout
* @param callableFactory
* Factory used to create the {@link SmallScannerCallable}
* @throws IOException
* If the remote call fails
*/
@VisibleForTesting
ClientSmallReversedScanner(final Configuration conf, final Scan scan, final TableName tableName,
ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout,
SmallReversedScannerCallableFactory callableFactory) throws IOException {
super(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
primaryOperationTimeout);
this.callableFactory = callableFactory;
}
/**
* Gets a scanner for following scan. Move to next region or continue from the last result or
* start from the start row.
*
* @param nbRows
* @param done
* true if Server-side says we're done scanning.
* @param currentRegionDone
* true if scan is over on current region
* @return true if has next scanner
* @throws IOException
*/
private boolean nextScanner(int nbRows, final boolean done,
boolean currentRegionDone) throws IOException {
// Where to start the next getter
byte[] localStartKey;
int cacheNum = nbRows;
boolean regionChanged = true;
boolean isFirstRegionToLocate = false;
// if we're at end of table, close and return false to stop iterating
if (this.currentRegion != null && currentRegionDone) {
byte[] startKey = this.currentRegion.getStartKey();
if (startKey == null
|| Bytes.equals(startKey, HConstants.EMPTY_BYTE_ARRAY)
|| checkScanStopRow(startKey) || done) {
close();
if (LOG.isDebugEnabled()) {
LOG.debug("Finished with small scan at " + this.currentRegion);
}
return false;
}
// We take the row just under to get to the previous region.
localStartKey = createClosestRowBefore(startKey);
if (LOG.isDebugEnabled()) {
LOG.debug("Finished with region " + this.currentRegion);
}
} else if (this.lastResult != null) {
regionChanged = false;
localStartKey = createClosestRowBefore(lastResult.getRow());
} else {
localStartKey = this.scan.getStartRow();
isFirstRegionToLocate = true;
}
if (!isFirstRegionToLocate
&& (localStartKey == null || Bytes.equals(localStartKey, HConstants.EMPTY_BYTE_ARRAY))) {
// when non-firstRegion & localStartKey is empty bytes, no more rowKey should scan.
// otherwise, maybe infinity results with RowKey=0x00 will return.
return false;
}
if (LOG.isTraceEnabled()) {
LOG.trace("Advancing internal small scanner to startKey at '"
+ Bytes.toStringBinary(localStartKey) + "'");
}
smallReversedScanCallable =
callableFactory.getCallable(getConnection(), getTable(), scan, getScanMetrics(),
localStartKey, cacheNum, rpcControllerFactory, getPool(), getPrimaryOperationTimeout(),
getRetries(), getScannerTimeout(), getConf(), caller, isFirstRegionToLocate);
if (this.scanMetrics != null && regionChanged) {
this.scanMetrics.countOfRegions.incrementAndGet();
}
return true;
}
@Override
public Result next() throws IOException {
// If the scanner is closed and there's nothing left in the cache, next is a
// no-op.
if (cache.size() == 0 && this.closed) {
return null;
}
if (cache.size() == 0) {
loadCache();
}
if (cache.size() > 0) {
return cache.poll();
}
// if we exhausted this scanner before calling close, write out the scan
// metrics
writeScanMetrics();
return null;
}
@Override
protected void loadCache() throws IOException {
Result[] values = null;
long remainingResultSize = maxScannerResultSize;
int countdown = this.caching;
boolean currentRegionDone = false;
// Values == null means server-side filter has determined we must STOP
while (remainingResultSize > 0 && countdown > 0
&& nextScanner(countdown, values == null, currentRegionDone)) {
// Server returns a null values if scanning is to stop. Else,
// returns an empty array if scanning is to go on and we've just
// exhausted current region.
// callWithoutRetries is at this layer. Within the ScannerCallableWithReplicas,
// we do a callWithRetries
values = this.caller.callWithoutRetries(smallReversedScanCallable, scannerTimeout);
this.currentRegion = smallReversedScanCallable.getHRegionInfo();
long currentTime = System.currentTimeMillis();
if (this.scanMetrics != null) {
this.scanMetrics.sumOfMillisSecBetweenNexts.addAndGet(currentTime
- lastNext);
}
lastNext = currentTime;
if (values != null && values.length > 0) {
for (int i = 0; i < values.length; i++) {
Result rs = values[i];
cache.add(rs);
// We don't make Iterator here
for (Cell cell : rs.rawCells()) {
remainingResultSize -= CellUtil.estimatedHeapSizeOf(cell);
}
countdown--;
this.lastResult = rs;
}
}
if (smallReversedScanCallable.hasMoreResultsContext()) {
currentRegionDone = !smallReversedScanCallable.getServerHasMoreResults();
} else {
currentRegionDone = countdown > 0;
}
}
}
@Override
protected void initializeScannerInConstruction() throws IOException {
// No need to initialize the scanner when constructing instance, do it when
// calling next(). Do nothing here.
}
@Override
public void close() {
if (!scanMetricsPublished) writeScanMetrics();
closed = true;
}
@VisibleForTesting
protected void setScannerCallableFactory(SmallReversedScannerCallableFactory callableFactory) {
this.callableFactory = callableFactory;
}
/**
* A reversed ScannerCallable which supports backward small scanning.
*/
static class SmallReversedScannerCallable extends ReversedScannerCallable {
public SmallReversedScannerCallable(ClusterConnection connection, TableName table, Scan scan,
ScanMetrics scanMetrics, byte[] locateStartRow, RpcControllerFactory controllerFactory,
int caching, int replicaId) {
super(connection, table, scan, scanMetrics, locateStartRow, controllerFactory, replicaId);
this.setCaching(caching);
}
@Override
public Result[] call(int timeout) throws IOException {
if (this.closed) return null;
if (Thread.interrupted()) {
throw new InterruptedIOException();
}
ClientProtos.ScanRequest request = RequestConverter.buildScanRequest(
getLocation().getRegionInfo().getRegionName(), getScan(), getCaching(), true);
ClientProtos.ScanResponse response = null;
controller = controllerFactory.newController();
try {
controller.setPriority(getTableName());
controller.setCallTimeout(timeout);
response = getStub().scan(controller, request);
Result[] results = ResponseConverter.getResults(controller.cellScanner(), response);
if (response.hasMoreResultsInRegion()) {
setHasMoreResultsContext(true);
setServerHasMoreResults(response.getMoreResultsInRegion());
} else {
setHasMoreResultsContext(false);
}
// We need to update result metrics since we are overriding call()
updateResultsMetrics(results);
return results;
} catch (ServiceException se) {
throw ProtobufUtil.getRemoteException(se);
}
}
@Override
public ScannerCallable getScannerCallableForReplica(int id) {
return new SmallReversedScannerCallable(getConnection(), getTableName(), getScan(),
scanMetrics, locateStartRow, controllerFactory, getCaching(), id);
}
}
protected static class SmallReversedScannerCallableFactory {
public ScannerCallableWithReplicas getCallable(ClusterConnection connection, TableName table,
Scan scan, ScanMetrics scanMetrics, byte[] localStartKey, int cacheNum,
RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout,
int retries, int scannerTimeout, Configuration conf, RpcRetryingCaller<Result[]> caller,
boolean isFirstRegionToLocate) {
byte[] locateStartRow = null;
if (isFirstRegionToLocate
&& (localStartKey == null || Bytes.equals(localStartKey, HConstants.EMPTY_BYTE_ARRAY))) {
// HBASE-16886: if not setting startRow, then we will use a range [MAX_BYTE_ARRAY, +oo) to
// locate a region list, and the last one in region list is the region where our scan start.
locateStartRow = ClientScanner.MAX_BYTE_ARRAY;
}
scan.setStartRow(localStartKey);
SmallReversedScannerCallable s = new SmallReversedScannerCallable(connection, table, scan,
scanMetrics, locateStartRow, controllerFactory, cacheNum, 0);
ScannerCallableWithReplicas scannerCallableWithReplicas =
new ScannerCallableWithReplicas(table, connection, s, pool, primaryOperationTimeout, scan,
retries, scannerTimeout, cacheNum, conf, caller);
return scannerCallableWithReplicas;
}
}
}

317
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientSmallScanner.java
View File

@ -1,317 +0,0 @@
/**
* Copyright The Apache Software Foundation
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with this
* work for additional information regarding copyright ownership. The ASF
* licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package org.apache.hadoop.hbase.client;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.util.concurrent.ExecutorService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.protobuf.RequestConverter;
import org.apache.hadoop.hbase.protobuf.ResponseConverter;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanResponse;
import org.apache.hadoop.hbase.util.Bytes;
import com.google.common.annotations.VisibleForTesting;
import com.google.protobuf.ServiceException;
/**
* Client scanner for small scan. Generally, only one RPC is called to fetch the
* scan results, unless the results cross multiple regions or the row count of
* results excess the caching.
*
* For small scan, it will get better performance than {@link ClientScanner}
*/
@InterfaceAudience.Private
public class ClientSmallScanner extends ClientScanner {
private static final Log LOG = LogFactory.getLog(ClientSmallScanner.class);
private ScannerCallableWithReplicas smallScanCallable = null;
private SmallScannerCallableFactory callableFactory;
/**
* Create a new ShortClientScanner for the specified table. Take note that the passed {@link Scan}
* 's start row maybe changed changed.
*
* @param conf
* The {@link Configuration} to use.
* @param scan
* {@link Scan} to use in this scanner
* @param tableName
* The table that we wish to rangeGet
* @param connection
* Connection identifying the cluster
* @param rpcFactory
* Factory used to create the {@link RpcRetryingCaller}
* @param controllerFactory
* Factory used to access RPC payloads
* @param pool
* Threadpool for RPC threads
* @param primaryOperationTimeout
* Call timeout
* @throws IOException
* If the remote call fails
*/
public ClientSmallScanner(final Configuration conf, final Scan scan, final TableName tableName,
ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout)
throws IOException {
this(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
primaryOperationTimeout, new SmallScannerCallableFactory());
}
/**
* Create a new ShortClientScanner for the specified table. Take note that the passed {@link Scan}
* 's start row maybe changed changed. Intended for unit tests to provide their own
* {@link SmallScannerCallableFactory} implementation/mock.
*
* @param conf
* The {@link Configuration} to use.
* @param scan
* {@link Scan} to use in this scanner
* @param tableName
* The table that we wish to rangeGet
* @param connection
* Connection identifying the cluster
* @param rpcFactory
* Factory used to create the {@link RpcRetryingCaller}
* @param controllerFactory
* Factory used to access RPC payloads
* @param pool
* Threadpool for RPC threads
* @param primaryOperationTimeout
* Call timeout
* @param callableFactory
* Factory used to create the {@link SmallScannerCallable}
* @throws IOException
*/
@VisibleForTesting
ClientSmallScanner(final Configuration conf, final Scan scan, final TableName tableName,
ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout,
SmallScannerCallableFactory callableFactory) throws IOException {
super(conf, scan, tableName, connection, rpcFactory, controllerFactory, pool,
primaryOperationTimeout);
this.callableFactory = callableFactory;
}
@Override
protected void initializeScannerInConstruction() throws IOException {
// No need to initialize the scanner when constructing instance, do it when
// calling next(). Do nothing here.
}
/**
* Gets a scanner for following scan. Move to next region or continue from the
* last result or start from the start row.
* @param nbRows
* @param done true if Server-side says we're done scanning.
* @param currentRegionDone true if scan is over on current region
* @return true if has next scanner
* @throws IOException
*/
private boolean nextScanner(int nbRows, final boolean done,
boolean currentRegionDone) throws IOException {
// Where to start the next getter
byte[] localStartKey;
int cacheNum = nbRows;
boolean regionChanged = true;
// if we're at end of table, close and return false to stop iterating
if (this.currentRegion != null && currentRegionDone) {
byte[] endKey = this.currentRegion.getEndKey();
if (endKey == null || Bytes.equals(endKey, HConstants.EMPTY_BYTE_ARRAY)
|| checkScanStopRow(endKey) || done) {
close();
if (LOG.isTraceEnabled()) {
LOG.trace("Finished with small scan at " + this.currentRegion);
}
return false;
}
localStartKey = endKey;
if (LOG.isTraceEnabled()) {
LOG.trace("Finished with region " + this.currentRegion);
}
} else if (this.lastResult != null) {
regionChanged = false;
localStartKey = Bytes.add(lastResult.getRow(), new byte[1]);
} else {
localStartKey = this.scan.getStartRow();
}
if (LOG.isTraceEnabled()) {
LOG.trace("Advancing internal small scanner to startKey at '"
+ Bytes.toStringBinary(localStartKey) + "'");
}
smallScanCallable = callableFactory.getCallable(getConnection(), getTable(), scan,
getScanMetrics(), localStartKey, cacheNum, rpcControllerFactory, getPool(),
getPrimaryOperationTimeout(), getRetries(), getScannerTimeout(), getConf(), caller);
if (this.scanMetrics != null && regionChanged) {
this.scanMetrics.countOfRegions.incrementAndGet();
}
return true;
}
static class SmallScannerCallable extends ScannerCallable {
public SmallScannerCallable(
ClusterConnection connection, TableName table, Scan scan,
ScanMetrics scanMetrics, RpcControllerFactory controllerFactory, int caching, int id) {
super(connection, table, scan, scanMetrics, controllerFactory, id);
this.setCaching(caching);
}
@Override
public Result[] call(int timeout) throws IOException {
if (this.closed) return null;
if (Thread.interrupted()) {
throw new InterruptedIOException();
}
ScanRequest request = RequestConverter.buildScanRequest(getLocation()
.getRegionInfo().getRegionName(), getScan(), getCaching(), true);
ScanResponse response = null;
controller = controllerFactory.newController();
try {
controller.setPriority(getTableName());
controller.setCallTimeout(timeout);
response = getStub().scan(controller, request);
Result[] results = ResponseConverter.getResults(controller.cellScanner(),
response);
if (response.hasMoreResultsInRegion()) {
setHasMoreResultsContext(true);
setServerHasMoreResults(response.getMoreResultsInRegion());
} else {
setHasMoreResultsContext(false);
}
// We need to update result metrics since we are overriding call()
updateResultsMetrics(results);
return results;
} catch (ServiceException se) {
throw ProtobufUtil.getRemoteException(se);
}
}
@Override
public ScannerCallable getScannerCallableForReplica(int id) {
return new SmallScannerCallable((ClusterConnection)connection, tableName, getScan(),
scanMetrics, controllerFactory, getCaching(), id);
}
}
@Override
public Result next() throws IOException {
// If the scanner is closed and there's nothing left in the cache, next is a
// no-op.
if (cache.size() == 0 && this.closed) {
return null;
}
if (cache.size() == 0) {
loadCache();
}
if (cache.size() > 0) {
return cache.poll();
}
// if we exhausted this scanner before calling close, write out the scan
// metrics
writeScanMetrics();
return null;
}
@Override
protected void loadCache() throws IOException {
Result[] values = null;
long remainingResultSize = maxScannerResultSize;
int countdown = this.caching;
boolean currentRegionDone = false;
// Values == null means server-side filter has determined we must STOP
while (remainingResultSize > 0 && countdown > 0
&& nextScanner(countdown, values == null, currentRegionDone)) {
// Server returns a null values if scanning is to stop. Else,
// returns an empty array if scanning is to go on and we've just
// exhausted current region.
// callWithoutRetries is at this layer. Within the ScannerCallableWithReplicas,
// we do a callWithRetries
values = this.caller.callWithoutRetries(smallScanCallable, scannerTimeout);
this.currentRegion = smallScanCallable.getHRegionInfo();
long currentTime = System.currentTimeMillis();
if (this.scanMetrics != null) {
this.scanMetrics.sumOfMillisSecBetweenNexts.addAndGet(currentTime
- lastNext);
}
lastNext = currentTime;
if (values != null && values.length > 0) {
for (int i = 0; i < values.length; i++) {
Result rs = values[i];
cache.add(rs);
// We don't make Iterator here
for (Cell cell : rs.rawCells()) {
remainingResultSize -= CellUtil.estimatedHeapSizeOf(cell);
}
countdown--;
this.lastResult = rs;
}
}
if (smallScanCallable.hasMoreResultsContext()) {
// If the server has more results, the current region is not done
currentRegionDone = !smallScanCallable.getServerHasMoreResults();
} else {
// not guaranteed to get the context in older versions, fall back to checking countdown
currentRegionDone = countdown > 0;
}
}
}
public void close() {
if (!scanMetricsPublished) writeScanMetrics();
closed = true;
}
@VisibleForTesting
protected void setScannerCallableFactory(SmallScannerCallableFactory callableFactory) {
this.callableFactory = callableFactory;
}
@InterfaceAudience.Private
protected static class SmallScannerCallableFactory {
public ScannerCallableWithReplicas getCallable(ClusterConnection connection, TableName table,
Scan scan, ScanMetrics scanMetrics, byte[] localStartKey, int cacheNum,
RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout,
int retries, int scannerTimeout, Configuration conf, RpcRetryingCaller<Result[]> caller) {
scan.setStartRow(localStartKey);
SmallScannerCallable s = new SmallScannerCallable(
connection, table, scan, scanMetrics, controllerFactory, cacheNum, 0);
ScannerCallableWithReplicas scannerCallableWithReplicas =
new ScannerCallableWithReplicas(table, connection,
s, pool, primaryOperationTimeout, scan, retries,
scannerTimeout, cacheNum, conf, caller);
return scannerCallableWithReplicas;
}
}
}

15
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionManager.java
View File

@ -1257,8 +1257,7 @@ class ConnectionManager {
Scan s = new Scan();
s.setReversed(true);
s.setStartRow(metaKey);
s.setSmall(true);
s.setCaching(1);
s.setOneRowLimit();
if (this.useMetaReplicas) {
s.setConsistency(Consistency.TIMELINE);
}
@ -1286,15 +1285,11 @@ class ConnectionManager {
long pauseBase = this.pause;
try {
Result regionInfoRow = null;
ReversedClientScanner rcs = null;
try {
rcs = new ClientSmallReversedScanner(conf, s, TableName.META_TABLE_NAME, this,
rpcCallerFactory, rpcControllerFactory, getMetaLookupPool(), 0);
s.resetMvccReadPoint();
try (ReversedClientScanner rcs =
new ReversedClientScanner(conf, s, TableName.META_TABLE_NAME, this, rpcCallerFactory,
rpcControllerFactory, getMetaLookupPool(), 0)) {
regionInfoRow = rcs.next();
} finally {
if (rcs != null) {
rcs.close();
}
}
if (regionInfoRow == null) {

39
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionUtils.java
View File

@ -17,14 +17,16 @@
*/
package org.apache.hadoop.hbase.client;
import com.google.common.annotations.VisibleForTesting;
import java.io.IOException;
import java.util.Arrays;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadLocalRandom;
import org.apache.commons.logging.Log;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
@ -32,8 +34,7 @@ import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.AdminService;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ClientService;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.security.UserProvider;
import com.google.common.annotations.VisibleForTesting;
import org.apache.hadoop.hbase.util.Bytes;
/**
* Utility used by client connections.
@ -195,4 +196,36 @@ public class ConnectionUtils {
return false;
}
}
// A byte array in which all elements are the max byte, and it is used to
// construct closest front row
static final byte[] MAX_BYTE_ARRAY = Bytes.createMaxByteArray(9);
/**
* Create the closest row after the specified row
*/
static byte[] createClosestRowAfter(byte[] row) {
return Arrays.copyOf(row, row.length + 1);
}
/**
* Create the closest row before the specified row
* @deprecated in fact, we do not know the closest row before the given row, the result is only a
* row very close to the current row. Avoid using this method in the future.
*/
@Deprecated
static byte[] createClosestRowBefore(byte[] row) {
if (row.length == 0) {
return MAX_BYTE_ARRAY;
}
if (row[row.length - 1] == 0) {
return Arrays.copyOf(row, row.length - 1);
} else {
byte[] nextRow = new byte[row.length + MAX_BYTE_ARRAY.length];
System.arraycopy(row, 0, nextRow, 0, row.length - 1);
nextRow[row.length - 1] = (byte) ((row[row.length - 1] & 0xFF) - 1);
System.arraycopy(MAX_BYTE_ARRAY, 0, nextRow, row.length, MAX_BYTE_ARRAY.length);
return nextRow;
}
}
}

18
hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java
View File

@ -795,21 +795,9 @@ public class HTable implements HTableInterface, RegionLocator {
}
if (scan.isReversed()) {
if (scan.isSmall()) {
return new ClientSmallReversedScanner(getConfiguration(), scan, getName(),
this.connection, this.rpcCallerFactory, this.rpcControllerFactory,
pool, connConfiguration.getReplicaCallTimeoutMicroSecondScan());
} else {
return new ReversedClientScanner(getConfiguration(), scan, getName(),
this.connection, this.rpcCallerFactory, this.rpcControllerFactory,
pool, connConfiguration.getReplicaCallTimeoutMicroSecondScan());
}
}
if (scan.isSmall()) {
return new ClientSmallScanner(getConfiguration(), scan, getName(),
this.connection, this.rpcCallerFactory, this.rpcControllerFactory,
pool, connConfiguration.getReplicaCallTimeoutMicroSecondScan());
return new ReversedClientScanner(getConfiguration(), scan, getName(),
this.connection, this.rpcCallerFactory, this.rpcControllerFactory,
pool, connConfiguration.getReplicaCallTimeoutMicroSecondScan());
} else {
return new ClientScanner(getConfiguration(), scan, getName(), this.connection,
this.rpcCallerFactory, this.rpcControllerFactory,

25
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedClientScanner.java
View File

@ -18,15 +18,18 @@
*/
package org.apache.hadoop.hbase.client;
import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowBefore;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.client.ScannerCallable.MoreResults;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.ExceptionUtil;
@ -58,8 +61,7 @@ public class ReversedClientScanner extends ClientScanner {
}
@Override
protected boolean nextScanner(int nbRows, final boolean done)
throws IOException {
protected Result[] nextScanner(int nbRows) throws IOException {
// Close the previous scanner if it's open
closeScanner();
@ -69,16 +71,17 @@ public class ReversedClientScanner extends ClientScanner {
// if we're at start of table, close and return false to stop iterating
if (this.currentRegion != null) {
byte[] startKey = this.currentRegion.getStartKey();
if (startKey == null
|| Bytes.equals(startKey, HConstants.EMPTY_BYTE_ARRAY)
|| checkScanStopRow(startKey) || done) {
if (startKey == null || Bytes.equals(startKey, HConstants.EMPTY_BYTE_ARRAY)
|| checkScanStopRow(startKey)) {
close();
if (LOG.isDebugEnabled()) {
LOG.debug("Finished " + this.currentRegion);
}
return false;
return null;
}
localStartKey = startKey;
// clear mvcc read point if we are going to switch regions
scan.resetMvccReadPoint();
if (LOG.isDebugEnabled()) {
LOG.debug("Finished " + this.currentRegion);
}
@ -109,17 +112,21 @@ public class ReversedClientScanner extends ClientScanner {
// beginning of the region
// callWithoutRetries is at this layer. Within the ScannerCallableWithReplicas,
// we do a callWithRetries
this.caller.callWithoutRetries(callable, scannerTimeout);
Result[] rrs = this.caller.callWithoutRetries(callable, scannerTimeout);
this.currentRegion = callable.getHRegionInfo();
if (this.scanMetrics != null) {
this.scanMetrics.countOfRegions.incrementAndGet();
}
if (rrs != null && rrs.length == 0 && callable.moreResultsForScan() == MoreResults.NO) {
// no results for the scan, return null to terminate the scan.
return null;
}
return rrs;
} catch (IOException e) {
ExceptionUtil.rethrowIfInterrupt(e);
close();
throw e;
}
return true;
}
protected ScannerCallableWithReplicas getScannerCallable(byte[] localStartKey,

2
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedScannerCallable.java
View File

@ -44,7 +44,7 @@ public class ReversedScannerCallable extends ScannerCallable {
/**
* The start row for locating regions. In reversed scanner, may locate the
* regions for a range of keys when doing
* {@link ReversedClientScanner#nextScanner(int, boolean)}
* {@link ReversedClientScanner#nextScanner(int)}
*/
protected final byte[] locateStartRow;

68
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java
View File

@ -174,6 +174,17 @@ public class Scan extends Query {
*/
private long mvccReadPoint = -1L;
/**
* The number of rows we want for this scan. We will terminate the scan if the number of return
* rows reaches this value.
*/
private int limit = -1;
/**
* Control whether to use pread at server side.
*/
private ReadType readType = ReadType.DEFAULT;
/**
* Create a Scan operation across all rows.
*/
@ -253,6 +264,7 @@ public class Scan extends Query {
setColumnFamilyTimeRange(entry.getKey(), tr.getMin(), tr.getMax());
}
this.mvccReadPoint = scan.getMvccReadPoint();
this.limit = scan.getLimit();
}
/**
@ -1013,6 +1025,62 @@ public class Scan extends Query {
return ProtobufUtil.toScanMetrics(bytes);
}
/**
* @return the limit of rows for this scan
*/
public int getLimit() {
return limit;
}
/**
* Set the limit of rows for this scan. We will terminate the scan if the number of returned rows
* reaches this value.
* <p>
* This condition will be tested at last, after all other conditions such as stopRow, filter, etc.
* <p>
* Can not be used together with batch and allowPartial.
* @param limit the limit of rows for this scan
* @return this
*/
public Scan setLimit(int limit) {
this.limit = limit;
return this;
}
/**
* Call this when you only want to get one row. It will set {@code limit} to {@code 1}, and also
* set {@code readType} to {@link ReadType#PREAD}.
* @return this
*/
public Scan setOneRowLimit() {
return setLimit(1).setReadType(ReadType.PREAD);
}
@InterfaceAudience.Public
@InterfaceStability.Unstable
public enum ReadType {
DEFAULT, STREAM, PREAD
}
/**
* @return the read type for this scan
*/
public ReadType getReadType() {
return readType;
}
/**
* Set the read type for this scan.
* <p>
* Notice that we may choose to use pread even if you specific {@link ReadType#STREAM} here. For
* example, we will always use pread if this is a get scan.
* @return this
*/
public Scan setReadType(ReadType readType) {
this.readType = readType;
return this;
}
/**
* Get the mvcc read point used to open a scanner.
*/

300
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallable.java
View File

@ -18,6 +18,9 @@
package org.apache.hadoop.hbase.client;
import com.google.protobuf.ServiceException;
import com.google.protobuf.TextFormat;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.UnknownHostException;
@ -26,10 +29,8 @@ import java.util.Map.Entry;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HBaseIOException;
@ -37,10 +38,10 @@ import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.NotServingRegionException;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.RemoteExceptionHandler;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.UnknownScannerException;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
import org.apache.hadoop.hbase.exceptions.ScannerResetException;
import org.apache.hadoop.hbase.ipc.PayloadCarryingRpcController;
@ -51,12 +52,8 @@ import org.apache.hadoop.hbase.protobuf.ResponseConverter;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanResponse;
import org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.net.DNS;
import com.google.protobuf.ServiceException;
import com.google.protobuf.TextFormat;
/**
* Scanner operations such as create, next, etc.
* Used by {@link ResultScanner}s made by {@link HTable}. Passed to a retrying caller such as
@ -82,9 +79,15 @@ public class ScannerCallable extends RegionServerCallable<Result[]> {
private int logCutOffLatency = 1000;
private static String myAddress;
protected final int id;
protected boolean serverHasMoreResultsContext;
protected boolean serverHasMoreResults;
enum MoreResults {
YES, NO, UNKNOWN
}
private MoreResults moreResultsInRegion;
private MoreResults moreResultsForScan;
private boolean openScanner;
/**
* Saves whether or not the most recent response from the server was a heartbeat message.
* Heartbeat messages are identified by the flag {@link ScanResponse#getHeartbeatMessage()}
@ -136,6 +139,7 @@ public class ScannerCallable extends RegionServerCallable<Result[]> {
logScannerActivity = conf.getBoolean(LOG_SCANNER_ACTIVITY, false);
logCutOffLatency = conf.getInt(LOG_SCANNER_LATENCY_CUTOFF, 1000);
this.controllerFactory = rpcControllerFactory;
this.controller = rpcControllerFactory.newController();
}
PayloadCarryingRpcController getController() {
@ -189,135 +193,124 @@ public class ScannerCallable extends RegionServerCallable<Result[]> {
}
}
private ScanResponse next() throws IOException {
// Reset the heartbeat flag prior to each RPC in case an exception is thrown by the server
setHeartbeatMessage(false);
incRPCcallsMetrics();
ScanRequest request = RequestConverter.buildScanRequest(scannerId, caching, false, nextCallSeq,
this.scanMetrics != null, renew, scan.getLimit());
try {
ScanResponse response = getStub().scan(controller, request);
nextCallSeq++;
return response;
} catch (Exception e) {
IOException ioe = ProtobufUtil.handleRemoteException(e);
if (logScannerActivity) {
LOG.info("Got exception making request " + TextFormat.shortDebugString(request) + " to " +
getLocation(),
e);
}
if (logScannerActivity) {
if (ioe instanceof UnknownScannerException) {
try {
HRegionLocation location =
getConnection().relocateRegion(getTableName(), scan.getStartRow());
LOG.info("Scanner=" + scannerId + " expired, current region location is "
+ location.toString());
} catch (Throwable t) {
LOG.info("Failed to relocate region", t);
}
} else if (ioe instanceof ScannerResetException) {
LOG.info("Scanner=" + scannerId + " has received an exception, and the server "
+ "asked us to reset the scanner state.",
ioe);
}
}
// The below convertion of exceptions into DoNotRetryExceptions is a little strange.
// Why not just have these exceptions implment DNRIOE you ask? Well, usually we want
// ServerCallable#withRetries to just retry when it gets these exceptions. In here in
// a scan when doing a next in particular, we want to break out and get the scanner to
// reset itself up again. Throwing a DNRIOE is how we signal this to happen (its ugly,
// yeah and hard to follow and in need of a refactor).
if (ioe instanceof NotServingRegionException) {
// Throw a DNRE so that we break out of cycle of calling NSRE
// when what we need is to open scanner against new location.
// Attach NSRE to signal client that it needs to re-setup scanner.
if (this.scanMetrics != null) {
this.scanMetrics.countOfNSRE.incrementAndGet();
}
throw new DoNotRetryIOException("Resetting the scanner -- see exception cause", ioe);
} else if (ioe instanceof RegionServerStoppedException) {
// Throw a DNRE so that we break out of cycle of the retries and instead go and
// open scanner against new location.
throw new DoNotRetryIOException("Resetting the scanner -- see exception cause", ioe);
} else {
// The outer layers will retry
throw ioe;
}
}
}
private void setAlreadyClosed() {
this.scannerId = -1L;
this.closed = true;
}
@Override
public Result [] call(int callTimeout) throws IOException {
public Result[] call(int callTimeout) throws IOException {
if (Thread.interrupted()) {
throw new InterruptedIOException();
}
if (controller == null) {
controller = controllerFactory.newController();
controller.setPriority(getTableName());
controller.setCallTimeout(callTimeout);
}
if (closed) {
if (scannerId != -1) {
close();
close();
return null;
}
controller.reset();
controller.setPriority(getTableName());
controller.setCallTimeout(callTimeout);
ScanResponse response;
if (this.scannerId == -1L) {
this.openScanner = true;
response = openScanner();
} else {
this.openScanner = false;
response = next();
}
long timestamp = System.currentTimeMillis();
setHeartbeatMessage(response.hasHeartbeatMessage() && response.getHeartbeatMessage());
Result[] rrs = ResponseConverter.getResults(controller.cellScanner(), response);
if (logScannerActivity) {
long now = System.currentTimeMillis();
if (now - timestamp > logCutOffLatency) {
int rows = rrs == null ? 0 : rrs.length;
LOG.info("Took " + (now - timestamp) + "ms to fetch " + rows + " rows from scanner="
+ scannerId);
}
}
updateServerSideMetrics(response);
// moreResults is only used for the case where a filter exhausts all elements
if (response.hasMoreResults()) {
if (response.getMoreResults()) {
setMoreResultsForScan(MoreResults.YES);
} else {
setMoreResultsForScan(MoreResults.NO);
setAlreadyClosed();
}
} else {
if (scannerId == -1L) {
this.scannerId = openScanner();
} else {
Result [] rrs = null;
ScanRequest request = null;
// Reset the heartbeat flag prior to each RPC in case an exception is thrown by the server
setHeartbeatMessage(false);
try {
incRPCcallsMetrics();
request =
RequestConverter.buildScanRequest(scannerId, caching, false, nextCallSeq,
this.scanMetrics != null, renew);
ScanResponse response = null;
try {
response = getStub().scan(controller, request);
// Client and RS maintain a nextCallSeq number during the scan. Every next() call
// from client to server will increment this number in both sides. Client passes this
// number along with the request and at RS side both the incoming nextCallSeq and its
// nextCallSeq will be matched. In case of a timeout this increment at the client side
// should not happen. If at the server side fetching of next batch of data was over,
// there will be mismatch in the nextCallSeq number. Server will throw
// OutOfOrderScannerNextException and then client will reopen the scanner with startrow
// as the last successfully retrieved row.
// See HBASE-5974
nextCallSeq++;
long timestamp = System.currentTimeMillis();
setHeartbeatMessage(response.hasHeartbeatMessage() && response.getHeartbeatMessage());
// Results are returned via controller
CellScanner cellScanner = controller.cellScanner();
rrs = ResponseConverter.getResults(cellScanner, response);
if (logScannerActivity) {
long now = System.currentTimeMillis();
if (now - timestamp > logCutOffLatency) {
int rows = rrs == null ? 0 : rrs.length;
LOG.info("Took " + (now-timestamp) + "ms to fetch "
+ rows + " rows from scanner=" + scannerId);
}
}
updateServerSideMetrics(response);
// moreResults is only used for the case where a filter exhausts all elements
if (response.hasMoreResults() && !response.getMoreResults()) {
scannerId = -1L;
closed = true;
// Implied that no results were returned back, either.
return null;
}
// moreResultsInRegion explicitly defines when a RS may choose to terminate a batch due
// to size or quantity of results in the response.
if (response.hasMoreResultsInRegion()) {
// Set what the RS said
setHasMoreResultsContext(true);
setServerHasMoreResults(response.getMoreResultsInRegion());
} else {
// Server didn't respond whether it has more results or not.
setHasMoreResultsContext(false);
}
} catch (ServiceException se) {
throw ProtobufUtil.getRemoteException(se);
}
updateResultsMetrics(rrs);
} catch (IOException e) {
if (logScannerActivity) {
LOG.info("Got exception making request " + TextFormat.shortDebugString(request)
+ " to " + getLocation(), e);
}
IOException ioe = e;
if (e instanceof RemoteException) {
ioe = RemoteExceptionHandler.decodeRemoteException((RemoteException)e);
}
if (logScannerActivity) {
if (ioe instanceof UnknownScannerException) {
try {
HRegionLocation location =
getConnection().relocateRegion(getTableName(), scan.getStartRow());
LOG.info("Scanner=" + scannerId
+ " expired, current region location is " + location.toString());
} catch (Throwable t) {
LOG.info("Failed to relocate region", t);
}
} else if (ioe instanceof ScannerResetException) {
LOG.info("Scanner=" + scannerId + " has received an exception, and the server "
+ "asked us to reset the scanner state.", ioe);
}
}
// The below convertion of exceptions into DoNotRetryExceptions is a little strange.
// Why not just have these exceptions implment DNRIOE you ask? Well, usually we want
// ServerCallable#withRetries to just retry when it gets these exceptions. In here in
// a scan when doing a next in particular, we want to break out and get the scanner to
// reset itself up again. Throwing a DNRIOE is how we signal this to happen (its ugly,
// yeah and hard to follow and in need of a refactor).
if (ioe instanceof NotServingRegionException) {
// Throw a DNRE so that we break out of cycle of calling NSRE
// when what we need is to open scanner against new location.
// Attach NSRE to signal client that it needs to re-setup scanner.
if (this.scanMetrics != null) {
this.scanMetrics.countOfNSRE.incrementAndGet();
}
throw new DoNotRetryIOException("Resetting the scanner -- see exception cause", ioe);
} else if (ioe instanceof RegionServerStoppedException) {
// Throw a DNRE so that we break out of cycle of the retries and instead go and
// open scanner against new location.
throw new DoNotRetryIOException("Resetting the scanner -- see exception cause", ioe);
} else {
// The outer layers will retry
throw ioe;
}
}
return rrs;
}
setMoreResultsForScan(MoreResults.UNKNOWN);
}
return null;
if (response.hasMoreResultsInRegion()) {
if (response.getMoreResultsInRegion()) {
setMoreResultsInRegion(MoreResults.YES);
} else {
setMoreResultsInRegion(MoreResults.NO);
setAlreadyClosed();
}
} else {
setMoreResultsInRegion(MoreResults.UNKNOWN);
}
updateResultsMetrics(rrs);
return rrs;
}
/**
@ -326,11 +319,11 @@ public class ScannerCallable extends RegionServerCallable<Result[]> {
* scan request exceeds a certain time threshold. Heartbeats allow the server to avoid
* timeouts during long running scan operations.
*/
protected boolean isHeartbeatMessage() {
boolean isHeartbeatMessage() {
return heartbeatMessage;
}
protected void setHeartbeatMessage(boolean heartbeatMessage) {
private void setHeartbeatMessage(boolean heartbeatMessage) {
this.heartbeatMessage = heartbeatMessage;
}
@ -397,12 +390,10 @@ public class ScannerCallable extends RegionServerCallable<Result[]> {
this.scannerId = -1L;
}
protected long openScanner() throws IOException {
private ScanResponse openScanner() throws IOException {
incRPCcallsMetrics();
ScanRequest request =
RequestConverter.buildScanRequest(
getLocation().getRegionInfo().getRegionName(),
this.scan, 0, false);
ScanRequest request = RequestConverter.buildScanRequest(
getLocation().getRegionInfo().getRegionName(), this.scan, this.caching, false);
try {
ScanResponse response = getStub().scan(controller, request);
long id = response.getScannerId();
@ -413,9 +404,10 @@ public class ScannerCallable extends RegionServerCallable<Result[]> {
if (response.hasMvccReadPoint()) {
this.scan.setMvccReadPoint(response.getMvccReadPoint());
}
return id;
} catch (ServiceException se) {
throw ProtobufUtil.getRemoteException(se);
this.scannerId = id;
return response;
} catch (Exception e) {
throw ProtobufUtil.handleRemoteException(e);
}
}
@ -480,27 +472,31 @@ public class ScannerCallable extends RegionServerCallable<Result[]> {
/**
* Should the client attempt to fetch more results from this region
* @return True if the client should attempt to fetch more results, false otherwise.
*/
protected boolean getServerHasMoreResults() {
assert serverHasMoreResultsContext;
return this.serverHasMoreResults;
MoreResults moreResultsInRegion() {
return moreResultsInRegion;
}
protected void setServerHasMoreResults(boolean serverHasMoreResults) {
this.serverHasMoreResults = serverHasMoreResults;
void setMoreResultsInRegion(MoreResults moreResults) {
this.moreResultsInRegion = moreResults;
}
/**
* Did the server respond with information about whether more results might exist.
* Not guaranteed to respond with older server versions
* @return True if the server responded with information about more results.
* Should the client attempt to fetch more results for the whole scan.
*/
protected boolean hasMoreResultsContext() {
return serverHasMoreResultsContext;
MoreResults moreResultsForScan() {
return moreResultsForScan;
}
protected void setHasMoreResultsContext(boolean serverHasMoreResultsContext) {
this.serverHasMoreResultsContext = serverHasMoreResultsContext;
void setMoreResultsForScan(MoreResults moreResults) {
this.moreResultsForScan = moreResults;
}
/**
* Whether the previous call is openScanner. This is used to keep compatible with the old
* implementation that we always returns empty result for openScanner.
*/
boolean isOpenScanner() {
return openScanner;
}
}

31
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallableWithReplicas.java
View File

@ -18,7 +18,10 @@
package org.apache.hadoop.hbase.client;
import static org.apache.hadoop.hbase.client.ClientScanner.createClosestRowBefore;
import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowAfter;
import static org.apache.hadoop.hbase.client.ConnectionUtils.createClosestRowBefore;
import com.google.common.annotations.VisibleForTesting;
import java.io.IOException;
import java.io.InterruptedIOException;
@ -30,22 +33,18 @@ import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.client.ScannerCallable.MoreResults;
import org.apache.hadoop.hbase.util.Pair;
import com.google.common.annotations.VisibleForTesting;
/**
* This class has the logic for handling scanners for regions with and without replicas.
* 1. A scan is attempted on the default (primary) region
@ -115,20 +114,16 @@ class ScannerCallableWithReplicas implements RetryingCallable<Result[]> {
return currentScannerCallable.getHRegionInfo();
}
public boolean getServerHasMoreResults() {
return currentScannerCallable.getServerHasMoreResults();
public MoreResults moreResultsInRegion() {
return currentScannerCallable.moreResultsInRegion();
}
public void setServerHasMoreResults(boolean serverHasMoreResults) {
currentScannerCallable.setServerHasMoreResults(serverHasMoreResults);
public MoreResults moreResultsForScan() {
return currentScannerCallable.moreResultsForScan();
}
public boolean hasMoreResultsContext() {
return currentScannerCallable.hasMoreResultsContext();
}
public void setHasMoreResultsContext(boolean serverHasMoreResultsContext) {
currentScannerCallable.setHasMoreResultsContext(serverHasMoreResultsContext);
public boolean isOpenScanner() {
return currentScannerCallable.isOpenScanner();
}
@Override
@ -342,7 +337,7 @@ class ScannerCallableWithReplicas implements RetryingCallable<Result[]> {
if (callable.getScan().isReversed()) {
callable.getScan().setStartRow(createClosestRowBefore(this.lastResult.getRow()));
} else {
callable.getScan().setStartRow(Bytes.add(this.lastResult.getRow(), new byte[1]));
callable.getScan().setStartRow(createClosestRowAfter(this.lastResult.getRow()));
}
}
}

96
hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java
View File

@ -20,6 +20,20 @@ package org.apache.hadoop.hbase.protobuf;
import static org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionSpecifier.RegionSpecifierType.REGION_NAME;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Lists;
import com.google.protobuf.ByteString;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.InvalidProtocolBufferException;
import com.google.protobuf.Message;
import com.google.protobuf.Parser;
import com.google.protobuf.RpcChannel;
import com.google.protobuf.RpcController;
import com.google.protobuf.Service;
import com.google.protobuf.ServiceException;
import com.google.protobuf.TextFormat;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
@ -47,6 +61,7 @@ import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HBaseIOException;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
@ -128,12 +143,12 @@ import org.apache.hadoop.hbase.protobuf.generated.QuotaProtos;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionServerReportRequest;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionServerStartupRequest;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.BulkLoadDescriptor;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.CompactionDescriptor;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.FlushDescriptor;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.FlushDescriptor.FlushAction;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.RegionEventDescriptor;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.RegionEventDescriptor.EventType;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.BulkLoadDescriptor;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.StoreDescriptor;
import org.apache.hadoop.hbase.quotas.QuotaScope;
import org.apache.hadoop.hbase.quotas.QuotaType;
@ -158,20 +173,6 @@ import org.apache.hadoop.io.Text;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.security.token.Token;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Lists;
import com.google.protobuf.ByteString;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.InvalidProtocolBufferException;
import com.google.protobuf.Message;
import com.google.protobuf.Parser;
import com.google.protobuf.RpcChannel;
import com.google.protobuf.RpcController;
import com.google.protobuf.Service;
import com.google.protobuf.ServiceException;
import com.google.protobuf.TextFormat;
/**
* Protobufs utility.
*/
@ -322,17 +323,32 @@ public final class ProtobufUtil {
* a new IOException that wraps the unexpected ServiceException.
*/
public static IOException getRemoteException(ServiceException se) {
Throwable e = se.getCause();
if (e == null) {
return new IOException(se);
return makeIOExceptionOfException(se);
}
/**
* Like {@link #getRemoteException(ServiceException)} but more generic, able to handle more than
* just {@link ServiceException}. Prefer this method to
* {@link #getRemoteException(ServiceException)} because trying to
* contain direct protobuf references.
* @param e
*/
public static IOException handleRemoteException(Exception e) {
return makeIOExceptionOfException(e);
}
private static IOException makeIOExceptionOfException(Exception e) {
Throwable t = e;
if (e instanceof ServiceException) {
t = e.getCause();
}
if (ExceptionUtil.isInterrupt(e)) {
return ExceptionUtil.asInterrupt(e);
if (ExceptionUtil.isInterrupt(t)) {
return ExceptionUtil.asInterrupt(t);
}
if (e instanceof RemoteException) {
e = ((RemoteException) e).unwrapRemoteException();
if (t instanceof RemoteException) {
t = ((RemoteException) t).unwrapRemoteException();
}
return e instanceof IOException ? (IOException) e : new IOException(se);
return t instanceof IOException ? (IOException) t : new HBaseIOException(t);
}
/**
@ -908,6 +924,32 @@ public final class ProtobufUtil {
return get;
}
public static ClientProtos.Scan.ReadType toReadType(Scan.ReadType readType) {
switch (readType) {
case DEFAULT:
return ClientProtos.Scan.ReadType.DEFAULT;
case STREAM:
return ClientProtos.Scan.ReadType.STREAM;
case PREAD:
return ClientProtos.Scan.ReadType.PREAD;
default:
throw new IllegalArgumentException("Unknown ReadType: " + readType);
}
}
public static Scan.ReadType toReadType(ClientProtos.Scan.ReadType readType) {
switch (readType) {
case DEFAULT:
return Scan.ReadType.DEFAULT;
case STREAM:
return Scan.ReadType.STREAM;
case PREAD:
return Scan.ReadType.PREAD;
default:
throw new IllegalArgumentException("Unknown ReadType: " + readType);
}
}
/**
* Convert a client Scan to a protocol buffer Scan
*
@ -1005,6 +1047,9 @@ public final class ProtobufUtil {
if (mvccReadPoint > 0) {
scanBuilder.setMvccReadPoint(mvccReadPoint);
}
if (scan.getReadType() != Scan.ReadType.DEFAULT) {
scanBuilder.setReadType(toReadType(scan.getReadType()));
}
return scanBuilder.build();
}
@ -1095,6 +1140,11 @@ public final class ProtobufUtil {
if (proto.hasMvccReadPoint()) {
PackagePrivateFieldAccessor.setMvccReadPoint(scan, proto.getMvccReadPoint());
}
if (scan.isSmall()) {
scan.setReadType(Scan.ReadType.PREAD);
} else if (proto.hasReadType()) {
scan.setReadType(toReadType(proto.getReadType()));
}
return scan;
}

8
hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/RequestConverter.java
View File

@ -498,6 +498,9 @@ public final class RequestConverter {
builder.setClientHandlesPartials(true);
builder.setClientHandlesHeartbeats(true);
builder.setTrackScanMetrics(scan.isScanMetricsEnabled());
if (scan.getLimit() > 0) {
builder.setLimitOfRows(scan.getLimit());
}
return builder.build();
}
@ -532,7 +535,7 @@ public final class RequestConverter {
*/
public static ScanRequest buildScanRequest(final long scannerId, final int numberOfRows,
final boolean closeScanner, final long nextCallSeq, final boolean trackMetrics,
final boolean renew) {
final boolean renew, int limitOfRows) {
ScanRequest.Builder builder = ScanRequest.newBuilder();
builder.setNumberOfRows(numberOfRows);
builder.setCloseScanner(closeScanner);
@ -542,6 +545,9 @@ public final class RequestConverter {
builder.setClientHandlesHeartbeats(true);
builder.setTrackScanMetrics(trackMetrics);
builder.setRenew(renew);
if (limitOfRows > 0) {
builder.setLimitOfRows(limitOfRows);
}
return builder.build();
}

112
hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientScanner.java
View File

@ -17,9 +17,11 @@
*/
package org.apache.hadoop.hbase.client;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.any;
@ -39,6 +41,7 @@ import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValue.Type;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.ScannerCallable.MoreResults;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.After;
@ -87,6 +90,7 @@ public class TestClientScanner {
private boolean rpcFinished = false;
private boolean rpcFinishedFired = false;
private boolean initialized = false;
public MockClientScanner(final Configuration conf, final Scan scan, final TableName tableName,
ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
@ -97,9 +101,13 @@ public class TestClientScanner {
}
@Override
protected boolean nextScanner(int nbRows, final boolean done) throws IOException {
protected Result[] nextScanner(int nbRows) throws IOException {
if (!initialized) {
initialized = true;
return super.nextScanner(nbRows);
}
if (!rpcFinished) {
return super.nextScanner(nbRows, done);
return super.nextScanner(nbRows);
}
// Enforce that we don't short-circuit more than once
@ -108,7 +116,7 @@ public class TestClientScanner {
" short-circuit was triggered.");
}
rpcFinishedFired = true;
return false;
return null;
}
@Override
@ -150,14 +158,13 @@ public class TestClientScanner {
ScannerCallableWithReplicas.class);
switch (count) {
case 0: // initialize
case 2: // detect no more results
case 3: // close
count++;
callable.currentScannerCallable.setMoreResultsInRegion(MoreResults.UNKNOWN);
return results;
case 1: // detect no more results
case 2: // close
count++;
return null;
case 1:
count++;
callable.setHasMoreResultsContext(false);
return results;
default:
throw new RuntimeException("Expected only 2 invocations");
}
@ -213,15 +220,13 @@ public class TestClientScanner {
ScannerCallableWithReplicas.class);
switch (count) {
case 0: // initialize
case 2: // close
count++;
// if we set no here the implementation will trigger a close
callable.currentScannerCallable.setMoreResultsInRegion(MoreResults.YES);
return results;
case 1: // close
count++;
return null;
case 1:
count++;
callable.setHasMoreResultsContext(true);
// if we set false here the implementation will trigger a close
callable.setServerHasMoreResults(true);
return results;
default:
throw new RuntimeException("Expected only 2 invocations");
}
@ -237,16 +242,11 @@ public class TestClientScanner {
try (MockClientScanner scanner = new MockClientScanner(conf, scan, TableName.valueOf("table"),
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
// Due to initializeScannerInConstruction()
Mockito.verify(caller).callWithoutRetries(Mockito.any(RetryingCallable.class),
Mockito.anyInt());
InOrder inOrder = Mockito.inOrder(caller);
scanner.loadCache();
inOrder.verify(caller, Mockito.times(2)).callWithoutRetries(
inOrder.verify(caller, Mockito.times(1)).callWithoutRetries(
Mockito.any(RetryingCallable.class), Mockito.anyInt());
assertEquals(1, scanner.cache.size());
@ -281,15 +281,13 @@ public class TestClientScanner {
ScannerCallableWithReplicas.class);
switch (count) {
case 0: // initialize
case 2: // close
count++;
// if we set no here the implementation will trigger a close
callable.currentScannerCallable.setMoreResultsInRegion(MoreResults.YES);
return results;
case 1: // close
count++;
return null;
case 1:
count++;
callable.setHasMoreResultsContext(true);
// if we set false here the implementation will trigger a close
callable.setServerHasMoreResults(true);
return results;
default:
throw new RuntimeException("Expected only 2 invocations");
}
@ -305,18 +303,11 @@ public class TestClientScanner {
try (MockClientScanner scanner = new MockClientScanner(conf, scan, TableName.valueOf("table"),
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
// Due to initializeScannerInConstruction()
Mockito.verify(caller).callWithoutRetries(Mockito.any(RetryingCallable.class),
Mockito.anyInt());
InOrder inOrder = Mockito.inOrder(caller);
scanner.loadCache();
// Ensures that possiblyNextScanner isn't called at the end which would trigger
// another call to callWithoutRetries
inOrder.verify(caller, Mockito.times(2)).callWithoutRetries(
inOrder.verify(caller, Mockito.times(1)).callWithoutRetries(
Mockito.any(RetryingCallable.class), Mockito.anyInt());
assertEquals(3, scanner.cache.size());
@ -363,14 +354,12 @@ public class TestClientScanner {
ScannerCallableWithReplicas.class);
switch (count) {
case 0: // initialize
case 2: // close
count++;
callable.currentScannerCallable.setMoreResultsInRegion(MoreResults.NO);
return results;
case 1: // close
count++;
return null;
case 1:
count++;
callable.setHasMoreResultsContext(true);
callable.setServerHasMoreResults(false);
return results;
default:
throw new RuntimeException("Expected only 2 invocations");
}
@ -385,18 +374,13 @@ public class TestClientScanner {
try (MockClientScanner scanner = new MockClientScanner(conf, scan, TableName.valueOf("table"),
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
// Due to initializeScannerInConstruction()
Mockito.verify(caller).callWithoutRetries(Mockito.any(RetryingCallable.class),
Mockito.anyInt());
scanner.setRpcFinished(true);
InOrder inOrder = Mockito.inOrder(caller);
scanner.loadCache();
inOrder.verify(caller, Mockito.times(2)).callWithoutRetries(
inOrder.verify(caller, Mockito.times(1)).callWithoutRetries(
Mockito.any(RetryingCallable.class), Mockito.anyInt());
assertEquals(1, scanner.cache.size());
@ -435,22 +419,19 @@ public class TestClientScanner {
ScannerCallableWithReplicas.class);
switch (count) {
case 0: // initialize
case 3: // close
count++;
return null;
callable.currentScannerCallable.setMoreResultsInRegion(MoreResults.YES);
return results1;
case 1:
count++;
callable.setHasMoreResultsContext(true);
callable.setServerHasMoreResults(true);
return results1;
case 2:
count++;
// The server reports back false WRT more results
callable.setHasMoreResultsContext(true);
callable.setServerHasMoreResults(false);
callable.currentScannerCallable.setMoreResultsInRegion(MoreResults.NO);
return results2;
case 2: // close
count++;
return null;
default:
throw new RuntimeException("Expected only 2 invocations");
throw new RuntimeException("Expected only 3 invocations");
}
}
});
@ -461,17 +442,12 @@ public class TestClientScanner {
try (MockClientScanner scanner = new MockClientScanner(conf, scan, TableName.valueOf("table"),
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
// Due to initializeScannerInConstruction()
Mockito.verify(caller).callWithoutRetries(Mockito.any(RetryingCallable.class),
Mockito.anyInt());
InOrder inOrder = Mockito.inOrder(caller);
scanner.setRpcFinished(true);
scanner.loadCache();
inOrder.verify(caller, Mockito.times(3)).callWithoutRetries(
inOrder.verify(caller, Mockito.times(2)).callWithoutRetries(
Mockito.any(RetryingCallable.class), Mockito.anyInt());
assertEquals(2, scanner.cache.size());
@ -516,8 +492,8 @@ public class TestClientScanner {
iter.next();
}
fail("Should have failed with RetriesExhaustedException");
} catch (RetriesExhaustedException expected) {
} catch (RuntimeException expected) {
assertThat(expected.getCause(), instanceOf(RetriesExhaustedException.class));
}
}
@ -552,7 +528,5 @@ public class TestClientScanner {
}
};
}
}
}

349
hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientSmallReversedScanner.java
View File

@ -1,349 +0,0 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.client;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValue.Type;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.ClientSmallReversedScanner.SmallReversedScannerCallableFactory;
import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
/**
* Test the ClientSmallReversedScanner.
*/
@Category(SmallTests.class)
public class TestClientSmallReversedScanner {
Scan scan;
ExecutorService pool;
Configuration conf;
ClusterConnection clusterConn;
RpcRetryingCallerFactory rpcFactory;
RpcControllerFactory controllerFactory;
RpcRetryingCaller<Result[]> caller;
@Before
@SuppressWarnings({"deprecation", "unchecked"})
public void setup() throws IOException {
clusterConn = Mockito.mock(ClusterConnection.class);
rpcFactory = Mockito.mock(RpcRetryingCallerFactory.class);
controllerFactory = Mockito.mock(RpcControllerFactory.class);
pool = Executors.newSingleThreadExecutor();
scan = new Scan();
conf = new Configuration();
Mockito.when(clusterConn.getConfiguration()).thenReturn(conf);
// Mock out the RpcCaller
caller = Mockito.mock(RpcRetryingCaller.class);
// Return the mock from the factory
Mockito.when(rpcFactory.<Result[]> newCaller()).thenReturn(caller);
}
@After
public void teardown() {
if (null != pool) {
pool.shutdownNow();
}
}
/**
* Create a simple Answer which returns true the first time, and false every time after.
*/
private Answer<Boolean> createTrueThenFalseAnswer() {
return new Answer<Boolean>() {
boolean first = true;
@Override
public Boolean answer(InvocationOnMock invocation) {
if (first) {
first = false;
return true;
}
return false;
}
};
}
private SmallReversedScannerCallableFactory getFactory(
final ScannerCallableWithReplicas callableWithReplicas) {
return new SmallReversedScannerCallableFactory() {
@Override
public ScannerCallableWithReplicas getCallable(ClusterConnection connection, TableName table,
Scan scan, ScanMetrics scanMetrics, byte[] localStartKey, int cacheNum,
RpcControllerFactory controllerFactory, ExecutorService pool,
int primaryOperationTimeout, int retries, int scannerTimeout, Configuration conf,
RpcRetryingCaller<Result[]> caller, boolean isFirstRegionToLocate) {
return callableWithReplicas;
}
};
}
@Test
public void testContextPresent() throws Exception {
final KeyValue kv1 = new KeyValue("row1".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum), kv2 = new KeyValue("row2".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum), kv3 = new KeyValue("row3".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum);
ScannerCallableWithReplicas callableWithReplicas = Mockito
.mock(ScannerCallableWithReplicas.class);
// Mock out the RpcCaller
@SuppressWarnings("unchecked")
RpcRetryingCaller<Result[]> caller = Mockito.mock(RpcRetryingCaller.class);
// Return the mock from the factory
Mockito.when(rpcFactory.<Result[]> newCaller()).thenReturn(caller);
// Intentionally leave a "default" caching size in the Scan. No matter the value, we
// should continue based on the server context
SmallReversedScannerCallableFactory factory = getFactory(callableWithReplicas);
try (ClientSmallReversedScanner csrs = new ClientSmallReversedScanner(conf, scan,
TableName.valueOf("table"), clusterConn, rpcFactory, controllerFactory, pool,
Integer.MAX_VALUE)) {
csrs.setScannerCallableFactory(factory);
// Return some data the first time, less the second, and none after that
Mockito.when(caller.callWithoutRetries(callableWithReplicas, csrs.getScannerTimeout()))
.thenAnswer(new Answer<Result[]>() {
int count = 0;
@Override
public Result[] answer(InvocationOnMock invocation) {
Result[] results;
if (0 == count) {
results = new Result[] {Result.create(new Cell[] {kv3}),
Result.create(new Cell[] {kv2})};
} else if (1 == count) {
results = new Result[] {Result.create(new Cell[] {kv1})};
} else {
results = new Result[0];
}
count++;
return results;
}
});
// Pass back the context always
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(true);
// Only have more results the first time
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenAnswer(
createTrueThenFalseAnswer());
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
// Trigger the "no more data" branch for #nextScanner(...)
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
csrs.loadCache();
List<Result> results = csrs.cache;
Iterator<Result> iter = results.iterator();
assertEquals(3, results.size());
for (int i = 3; i >= 1 && iter.hasNext(); i--) {
Result result = iter.next();
byte[] row = result.getRow();
assertEquals("row" + i, new String(row, StandardCharsets.UTF_8));
assertEquals(1, result.getMap().size());
}
assertTrue(csrs.closed);
}
}
@Test
public void testNoContextFewerRecords() throws Exception {
final KeyValue kv1 = new KeyValue("row1".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum), kv2 = new KeyValue("row2".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum), kv3 = new KeyValue("row3".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum);
ScannerCallableWithReplicas callableWithReplicas = Mockito
.mock(ScannerCallableWithReplicas.class);
// While the server returns 2 records per batch, we expect more records.
scan.setCaching(2);
SmallReversedScannerCallableFactory factory = getFactory(callableWithReplicas);
try (ClientSmallReversedScanner csrs = new ClientSmallReversedScanner(conf, scan,
TableName.valueOf("table"), clusterConn, rpcFactory, controllerFactory, pool,
Integer.MAX_VALUE)) {
csrs.setScannerCallableFactory(factory);
// Return some data the first time, less the second, and none after that
Mockito.when(caller.callWithoutRetries(callableWithReplicas, csrs.getScannerTimeout()))
.thenAnswer(new Answer<Result[]>() {
int count = 0;
@Override
public Result[] answer(InvocationOnMock invocation) {
Result[] results;
if (0 == count) {
results = new Result[] {Result.create(new Cell[] {kv3}),
Result.create(new Cell[] {kv2})};
} else if (1 == count) {
// Return fewer records than expected (2)
results = new Result[] {Result.create(new Cell[] {kv1})};
} else {
throw new RuntimeException("Should not fetch a third batch from the server");
}
count++;
return results;
}
});
// Server doesn't return the context
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(false);
// getServerHasMoreResults shouldn't be called when hasMoreResultsContext returns false
Mockito.when(callableWithReplicas.getServerHasMoreResults())
.thenThrow(new RuntimeException("Should not be called"));
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
// Trigger the "no more data" branch for #nextScanner(...)
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
csrs.loadCache();
List<Result> results = csrs.cache;
Iterator<Result> iter = results.iterator();
assertEquals(2, results.size());
for (int i = 3; i >= 2 && iter.hasNext(); i--) {
Result result = iter.next();
byte[] row = result.getRow();
assertEquals("row" + i, new String(row, StandardCharsets.UTF_8));
assertEquals(1, result.getMap().size());
}
// "consume" the Results
results.clear();
csrs.loadCache();
assertEquals(1, results.size());
Result result = results.get(0);
assertEquals("row1", new String(result.getRow(), StandardCharsets.UTF_8));
assertEquals(1, result.getMap().size());
assertTrue(csrs.closed);
}
}
@Test
public void testNoContextNoRecords() throws Exception {
ScannerCallableWithReplicas callableWithReplicas = Mockito
.mock(ScannerCallableWithReplicas.class);
// While the server return 2 records per RPC, we expect there to be more records.
scan.setCaching(2);
SmallReversedScannerCallableFactory factory = getFactory(callableWithReplicas);
try (ClientSmallReversedScanner csrs = new ClientSmallReversedScanner(conf, scan,
TableName.valueOf("table"), clusterConn, rpcFactory, controllerFactory, pool,
Integer.MAX_VALUE)) {
csrs.setScannerCallableFactory(factory);
// Return some data the first time, less the second, and none after that
Mockito.when(caller.callWithoutRetries(callableWithReplicas, csrs.getScannerTimeout()))
.thenReturn(new Result[0]);
// Server doesn't return the context
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(false);
// Only have more results the first time
Mockito.when(callableWithReplicas.getServerHasMoreResults())
.thenThrow(new RuntimeException("Should not be called"));
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
// Trigger the "no more data" branch for #nextScanner(...)
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
csrs.loadCache();
assertEquals(0, csrs.cache.size());
assertTrue(csrs.closed);
}
}
@Test
public void testContextNoRecords() throws Exception {
ScannerCallableWithReplicas callableWithReplicas = Mockito
.mock(ScannerCallableWithReplicas.class);
SmallReversedScannerCallableFactory factory = getFactory(callableWithReplicas);
try (ClientSmallReversedScanner csrs = new ClientSmallReversedScanner(conf, scan,
TableName.valueOf("table"), clusterConn, rpcFactory, controllerFactory, pool,
Integer.MAX_VALUE)) {
csrs.setScannerCallableFactory(factory);
// Return some data the first time, less the second, and none after that
Mockito.when(caller.callWithoutRetries(callableWithReplicas, csrs.getScannerTimeout()))
.thenReturn(new Result[0]);
// Server doesn't return the context
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(true);
// Only have more results the first time
Mockito.when(callableWithReplicas.getServerHasMoreResults())
.thenReturn(false);
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
// Trigger the "no more data" branch for #nextScanner(...)
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
csrs.loadCache();
assertEquals(0, csrs.cache.size());
assertTrue(csrs.closed);
}
}
}

339
hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientSmallScanner.java
View File

@ -1,339 +0,0 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.client;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValue.Type;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.ClientSmallScanner.SmallScannerCallableFactory;
import org.apache.hadoop.hbase.client.metrics.ScanMetrics;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
/**
* Test the ClientSmallScanner.
*/
@Category(SmallTests.class)
public class TestClientSmallScanner {
Scan scan;
ExecutorService pool;
Configuration conf;
ClusterConnection clusterConn;
RpcRetryingCallerFactory rpcFactory;
RpcControllerFactory controllerFactory;
RpcRetryingCaller<Result[]> caller;
@Before
@SuppressWarnings({"deprecation", "unchecked"})
public void setup() throws IOException {
clusterConn = Mockito.mock(ClusterConnection.class);
rpcFactory = Mockito.mock(RpcRetryingCallerFactory.class);
controllerFactory = Mockito.mock(RpcControllerFactory.class);
pool = Executors.newSingleThreadExecutor();
scan = new Scan();
conf = new Configuration();
Mockito.when(clusterConn.getConfiguration()).thenReturn(conf);
// Mock out the RpcCaller
caller = Mockito.mock(RpcRetryingCaller.class);
// Return the mock from the factory
Mockito.when(rpcFactory.<Result[]> newCaller()).thenReturn(caller);
}
@After
public void teardown() {
if (null != pool) {
pool.shutdownNow();
}
}
/**
* Create a simple Answer which returns true the first time, and false every time after.
*/
private Answer<Boolean> createTrueThenFalseAnswer() {
return new Answer<Boolean>() {
boolean first = true;
@Override
public Boolean answer(InvocationOnMock invocation) {
if (first) {
first = false;
return true;
}
return false;
}
};
}
private SmallScannerCallableFactory getFactory(
final ScannerCallableWithReplicas callableWithReplicas) {
return new SmallScannerCallableFactory() {
@Override
public ScannerCallableWithReplicas getCallable(ClusterConnection connection, TableName table,
Scan scan, ScanMetrics scanMetrics, byte[] localStartKey, int cacheNum,
RpcControllerFactory controllerFactory, ExecutorService pool,
int primaryOperationTimeout, int retries, int scannerTimeout, Configuration conf,
RpcRetryingCaller<Result[]> caller) {
return callableWithReplicas;
}
};
}
@Test
public void testContextPresent() throws Exception {
final KeyValue kv1 = new KeyValue("row1".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum), kv2 = new KeyValue("row2".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum), kv3 = new KeyValue("row3".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum);
ScannerCallableWithReplicas callableWithReplicas = Mockito
.mock(ScannerCallableWithReplicas.class);
// Mock out the RpcCaller
@SuppressWarnings("unchecked")
RpcRetryingCaller<Result[]> caller = Mockito.mock(RpcRetryingCaller.class);
// Return the mock from the factory
Mockito.when(rpcFactory.<Result[]> newCaller()).thenReturn(caller);
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
// Intentionally leave a "default" caching size in the Scan. No matter the value, we
// should continue based on the server context
try (ClientSmallScanner css = new ClientSmallScanner(conf, scan, TableName.valueOf("table"),
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
css.setScannerCallableFactory(factory);
// Return some data the first time, less the second, and none after that
Mockito.when(caller.callWithoutRetries(callableWithReplicas, css.getScannerTimeout()))
.thenAnswer(new Answer<Result[]>() {
int count = 0;
@Override
public Result[] answer(InvocationOnMock invocation) {
Result[] results;
if (0 == count) {
results = new Result[] {Result.create(new Cell[] {kv1}),
Result.create(new Cell[] {kv2})};
} else if (1 == count) {
results = new Result[] {Result.create(new Cell[] {kv3})};
} else {
results = new Result[0];
}
count++;
return results;
}
});
// Pass back the context always
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(true);
// Only have more results the first time
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenAnswer(
createTrueThenFalseAnswer());
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
// Trigger the "no more data" branch for #nextScanner(...)
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
css.loadCache();
List<Result> results = css.cache;
assertEquals(3, results.size());
for (int i = 1; i <= 3; i++) {
Result result = results.get(i - 1);
byte[] row = result.getRow();
assertEquals("row" + i, new String(row, StandardCharsets.UTF_8));
assertEquals(1, result.getMap().size());
}
assertTrue(css.closed);
}
}
@Test
public void testNoContextFewerRecords() throws Exception {
final KeyValue kv1 = new KeyValue("row1".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum), kv2 = new KeyValue("row2".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum), kv3 = new KeyValue("row3".getBytes(), "cf".getBytes(), "cq".getBytes(), 1,
Type.Maximum);
ScannerCallableWithReplicas callableWithReplicas = Mockito
.mock(ScannerCallableWithReplicas.class);
// While the server returns 2 records per batch, we expect more records.
scan.setCaching(2);
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
try (ClientSmallScanner css = new ClientSmallScanner(conf, scan, TableName.valueOf("table"),
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
css.setScannerCallableFactory(factory);
// Return some data the first time, less the second, and none after that
Mockito.when(caller.callWithoutRetries(callableWithReplicas, css.getScannerTimeout()))
.thenAnswer(new Answer<Result[]>() {
int count = 0;
@Override
public Result[] answer(InvocationOnMock invocation) {
Result[] results;
if (0 == count) {
results = new Result[] {Result.create(new Cell[] {kv1}),
Result.create(new Cell[] {kv2})};
} else if (1 == count) {
// Return fewer records than expected (2)
results = new Result[] {Result.create(new Cell[] {kv3})};
} else {
throw new RuntimeException("Should not fetch a third batch from the server");
}
count++;
return results;
}
});
// Server doesn't return the context
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(false);
// Only have more results the first time
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenThrow(
new RuntimeException("Should not be called"));
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
// Trigger the "no more data" branch for #nextScanner(...)
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
css.loadCache();
List<Result> results = css.cache;
assertEquals(2, results.size());
for (int i = 1; i <= 2; i++) {
Result result = results.get(i - 1);
byte[] row = result.getRow();
assertEquals("row" + i, new String(row, StandardCharsets.UTF_8));
assertEquals(1, result.getMap().size());
}
// "consume" the results we verified
results.clear();
css.loadCache();
assertEquals(1, results.size());
Result result = results.get(0);
assertEquals("row3", new String(result.getRow(), StandardCharsets.UTF_8));
assertEquals(1, result.getMap().size());
assertTrue(css.closed);
}
}
@Test
public void testNoContextNoRecords() throws Exception {
ScannerCallableWithReplicas callableWithReplicas = Mockito
.mock(ScannerCallableWithReplicas.class);
// While the server return 2 records per RPC, we expect there to be more records.
scan.setCaching(2);
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
try (ClientSmallScanner css = new ClientSmallScanner(conf, scan, TableName.valueOf("table"),
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
css.setScannerCallableFactory(factory);
// Return some data the first time, less the second, and none after that
Mockito.when(caller.callWithoutRetries(callableWithReplicas, css.getScannerTimeout()))
.thenReturn(new Result[0]);
// Server doesn't return the context
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(false);
// Only have more results the first time
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenThrow(
new RuntimeException("Should not be called"));
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
// Trigger the "no more data" branch for #nextScanner(...)
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
css.loadCache();
assertEquals(0, css.cache.size());
assertTrue(css.closed);
}
}
@Test
public void testContextNoRecords() throws Exception {
ScannerCallableWithReplicas callableWithReplicas = Mockito
.mock(ScannerCallableWithReplicas.class);
SmallScannerCallableFactory factory = getFactory(callableWithReplicas);
try (ClientSmallScanner css = new ClientSmallScanner(conf, scan, TableName.valueOf("table"),
clusterConn, rpcFactory, controllerFactory, pool, Integer.MAX_VALUE)) {
css.setScannerCallableFactory(factory);
// Return some data the first time, less the second, and none after that
Mockito.when(caller.callWithoutRetries(callableWithReplicas, css.getScannerTimeout()))
.thenReturn(new Result[0]);
// Server doesn't return the context
Mockito.when(callableWithReplicas.hasMoreResultsContext()).thenReturn(true);
// Only have more results the first time
Mockito.when(callableWithReplicas.getServerHasMoreResults()).thenReturn(false);
// A mocked HRegionInfo so ClientSmallScanner#nextScanner(...) works right
HRegionInfo regionInfo = Mockito.mock(HRegionInfo.class);
Mockito.when(callableWithReplicas.getHRegionInfo()).thenReturn(regionInfo);
// Trigger the "no more data" branch for #nextScanner(...)
Mockito.when(regionInfo.getEndKey()).thenReturn(HConstants.EMPTY_BYTE_ARRAY);
css.loadCache();
assertEquals(0, css.cache.size());
assertTrue(css.closed);
}
}
}

655
hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/ClientProtos.java
View File

@ -14239,6 +14239,36 @@ public final class ClientProtos {
* <code>optional uint64 mvcc_read_point = 20 [default = 0];</code>
*/
long getMvccReadPoint();
// optional bool include_start_row = 21 [default = true];
/**
* <code>optional bool include_start_row = 21 [default = true];</code>
*/
boolean hasIncludeStartRow();
/**
* <code>optional bool include_start_row = 21 [default = true];</code>
*/
boolean getIncludeStartRow();
// optional bool include_stop_row = 22 [default = false];
/**
* <code>optional bool include_stop_row = 22 [default = false];</code>
*/
boolean hasIncludeStopRow();
/**
* <code>optional bool include_stop_row = 22 [default = false];</code>
*/
boolean getIncludeStopRow();
// optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];
/**
* <code>optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];</code>
*/
boolean hasReadType();
/**
* <code>optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];</code>
*/
org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType getReadType();
}
/**
* Protobuf type {@code hbase.pb.Scan}
@ -14433,6 +14463,27 @@ public final class ClientProtos {
mvccReadPoint_ = input.readUInt64();
break;
}
case 168: {
bitField0_ |= 0x00020000;
includeStartRow_ = input.readBool();
break;
}
case 176: {
bitField0_ |= 0x00040000;
includeStopRow_ = input.readBool();
break;
}
case 184: {
int rawValue = input.readEnum();
org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType value = org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType.valueOf(rawValue);
if (value == null) {
unknownFields.mergeVarintField(23, rawValue);
} else {
bitField0_ |= 0x00080000;
readType_ = value;
}
break;
}
}
}
} catch (com.google.protobuf.InvalidProtocolBufferException e) {
@ -14481,6 +14532,97 @@ public final class ClientProtos {
return PARSER;
}
/**
* Protobuf enum {@code hbase.pb.Scan.ReadType}
*/
public enum ReadType
implements com.google.protobuf.ProtocolMessageEnum {
/**
* <code>DEFAULT = 0;</code>
*/
DEFAULT(0, 0),
/**
* <code>STREAM = 1;</code>
*/
STREAM(1, 1),
/**
* <code>PREAD = 2;</code>
*/
PREAD(2, 2),
;
/**
* <code>DEFAULT = 0;</code>
*/
public static final int DEFAULT_VALUE = 0;
/**
* <code>STREAM = 1;</code>
*/
public static final int STREAM_VALUE = 1;
/**
* <code>PREAD = 2;</code>
*/
public static final int PREAD_VALUE = 2;
public final int getNumber() { return value; }
public static ReadType valueOf(int value) {
switch (value) {
case 0: return DEFAULT;
case 1: return STREAM;
case 2: return PREAD;
default: return null;
}
}
public static com.google.protobuf.Internal.EnumLiteMap<ReadType>
internalGetValueMap() {
return internalValueMap;
}
private static com.google.protobuf.Internal.EnumLiteMap<ReadType>
internalValueMap =
new com.google.protobuf.Internal.EnumLiteMap<ReadType>() {
public ReadType findValueByNumber(int number) {
return ReadType.valueOf(number);
}
};
public final com.google.protobuf.Descriptors.EnumValueDescriptor
getValueDescriptor() {
return getDescriptor().getValues().get(index);
}
public final com.google.protobuf.Descriptors.EnumDescriptor
getDescriptorForType() {
return getDescriptor();
}
public static final com.google.protobuf.Descriptors.EnumDescriptor
getDescriptor() {
return org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.getDescriptor().getEnumTypes().get(0);
}
private static final ReadType[] VALUES = values();
public static ReadType valueOf(
com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
if (desc.getType() != getDescriptor()) {
throw new java.lang.IllegalArgumentException(
"EnumValueDescriptor is not for this type.");
}
return VALUES[desc.getIndex()];
}
private final int index;
private final int value;
private ReadType(int index, int value) {
this.index = index;
this.value = value;
}
// @@protoc_insertion_point(enum_scope:hbase.pb.Scan.ReadType)
}
private int bitField0_;
// repeated .hbase.pb.Column column = 1;
public static final int COLUMN_FIELD_NUMBER = 1;
@ -14882,6 +15024,54 @@ public final class ClientProtos {
return mvccReadPoint_;
}
// optional bool include_start_row = 21 [default = true];
public static final int INCLUDE_START_ROW_FIELD_NUMBER = 21;
private boolean includeStartRow_;
/**
* <code>optional bool include_start_row = 21 [default = true];</code>
*/
public boolean hasIncludeStartRow() {
return ((bitField0_ & 0x00020000) == 0x00020000);
}
/**
* <code>optional bool include_start_row = 21 [default = true];</code>
*/
public boolean getIncludeStartRow() {
return includeStartRow_;
}
// optional bool include_stop_row = 22 [default = false];
public static final int INCLUDE_STOP_ROW_FIELD_NUMBER = 22;
private boolean includeStopRow_;
/**
* <code>optional bool include_stop_row = 22 [default = false];</code>
*/
public boolean hasIncludeStopRow() {
return ((bitField0_ & 0x00040000) == 0x00040000);
}
/**
* <code>optional bool include_stop_row = 22 [default = false];</code>
*/
public boolean getIncludeStopRow() {
return includeStopRow_;
}
// optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];
public static final int READTYPE_FIELD_NUMBER = 23;
private org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType readType_;
/**
* <code>optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];</code>
*/
public boolean hasReadType() {
return ((bitField0_ & 0x00080000) == 0x00080000);
}
/**
* <code>optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];</code>
*/
public org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType getReadType() {
return readType_;
}
private void initFields() {
column_ = java.util.Collections.emptyList();
attribute_ = java.util.Collections.emptyList();
@ -14903,6 +15093,9 @@ public final class ClientProtos {
allowPartialResults_ = false;
cfTimeRange_ = java.util.Collections.emptyList();
mvccReadPoint_ = 0L;
includeStartRow_ = true;
includeStopRow_ = false;
readType_ = org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType.DEFAULT;
}
private byte memoizedIsInitialized = -1;
public final boolean isInitialized() {
@ -15000,6 +15193,15 @@ public final class ClientProtos {
if (((bitField0_ & 0x00010000) == 0x00010000)) {
output.writeUInt64(20, mvccReadPoint_);
}
if (((bitField0_ & 0x00020000) == 0x00020000)) {
output.writeBool(21, includeStartRow_);
}
if (((bitField0_ & 0x00040000) == 0x00040000)) {
output.writeBool(22, includeStopRow_);
}
if (((bitField0_ & 0x00080000) == 0x00080000)) {
output.writeEnum(23, readType_.getNumber());
}
getUnknownFields().writeTo(output);
}
@ -15089,6 +15291,18 @@ public final class ClientProtos {
size += com.google.protobuf.CodedOutputStream
.computeUInt64Size(20, mvccReadPoint_);
}
if (((bitField0_ & 0x00020000) == 0x00020000)) {
size += com.google.protobuf.CodedOutputStream
.computeBoolSize(21, includeStartRow_);
}
if (((bitField0_ & 0x00040000) == 0x00040000)) {
size += com.google.protobuf.CodedOutputStream
.computeBoolSize(22, includeStopRow_);
}
if (((bitField0_ & 0x00080000) == 0x00080000)) {
size += com.google.protobuf.CodedOutputStream
.computeEnumSize(23, readType_.getNumber());
}
size += getUnknownFields().getSerializedSize();
memoizedSerializedSize = size;
return size;
@ -15203,6 +15417,21 @@ public final class ClientProtos {
result = result && (getMvccReadPoint()
== other.getMvccReadPoint());
}
result = result && (hasIncludeStartRow() == other.hasIncludeStartRow());
if (hasIncludeStartRow()) {
result = result && (getIncludeStartRow()
== other.getIncludeStartRow());
}
result = result && (hasIncludeStopRow() == other.hasIncludeStopRow());
if (hasIncludeStopRow()) {
result = result && (getIncludeStopRow()
== other.getIncludeStopRow());
}
result = result && (hasReadType() == other.hasReadType());
if (hasReadType()) {
result = result &&
(getReadType() == other.getReadType());
}
result = result &&
getUnknownFields().equals(other.getUnknownFields());
return result;
@ -15296,6 +15525,18 @@ public final class ClientProtos {
hash = (37 * hash) + MVCC_READ_POINT_FIELD_NUMBER;
hash = (53 * hash) + hashLong(getMvccReadPoint());
}
if (hasIncludeStartRow()) {
hash = (37 * hash) + INCLUDE_START_ROW_FIELD_NUMBER;
hash = (53 * hash) + hashBoolean(getIncludeStartRow());
}
if (hasIncludeStopRow()) {
hash = (37 * hash) + INCLUDE_STOP_ROW_FIELD_NUMBER;
hash = (53 * hash) + hashBoolean(getIncludeStopRow());
}
if (hasReadType()) {
hash = (37 * hash) + READTYPE_FIELD_NUMBER;
hash = (53 * hash) + hashEnum(getReadType());
}
hash = (29 * hash) + getUnknownFields().hashCode();
memoizedHashCode = hash;
return hash;
@ -15481,6 +15722,12 @@ public final class ClientProtos {
}
mvccReadPoint_ = 0L;
bitField0_ = (bitField0_ & ~0x00080000);
includeStartRow_ = true;
bitField0_ = (bitField0_ & ~0x00100000);
includeStopRow_ = false;
bitField0_ = (bitField0_ & ~0x00200000);
readType_ = org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType.DEFAULT;
bitField0_ = (bitField0_ & ~0x00400000);
return this;
}
@ -15612,6 +15859,18 @@ public final class ClientProtos {
to_bitField0_ |= 0x00010000;
}
result.mvccReadPoint_ = mvccReadPoint_;
if (((from_bitField0_ & 0x00100000) == 0x00100000)) {
to_bitField0_ |= 0x00020000;
}
result.includeStartRow_ = includeStartRow_;
if (((from_bitField0_ & 0x00200000) == 0x00200000)) {
to_bitField0_ |= 0x00040000;
}
result.includeStopRow_ = includeStopRow_;
if (((from_bitField0_ & 0x00400000) == 0x00400000)) {
to_bitField0_ |= 0x00080000;
}
result.readType_ = readType_;
result.bitField0_ = to_bitField0_;
onBuilt();
return result;
@ -15757,6 +16016,15 @@ public final class ClientProtos {
if (other.hasMvccReadPoint()) {
setMvccReadPoint(other.getMvccReadPoint());
}
if (other.hasIncludeStartRow()) {
setIncludeStartRow(other.getIncludeStartRow());
}
if (other.hasIncludeStopRow()) {
setIncludeStopRow(other.getIncludeStopRow());
}
if (other.hasReadType()) {
setReadType(other.getReadType());
}
this.mergeUnknownFields(other.getUnknownFields());
return this;
}
@ -17282,6 +17550,108 @@ public final class ClientProtos {
return this;
}
// optional bool include_start_row = 21 [default = true];
private boolean includeStartRow_ = true;
/**
* <code>optional bool include_start_row = 21 [default = true];</code>
*/
public boolean hasIncludeStartRow() {
return ((bitField0_ & 0x00100000) == 0x00100000);
}
/**
* <code>optional bool include_start_row = 21 [default = true];</code>
*/
public boolean getIncludeStartRow() {
return includeStartRow_;
}
/**
* <code>optional bool include_start_row = 21 [default = true];</code>
*/
public Builder setIncludeStartRow(boolean value) {
bitField0_ |= 0x00100000;
includeStartRow_ = value;
onChanged();
return this;
}
/**
* <code>optional bool include_start_row = 21 [default = true];</code>
*/
public Builder clearIncludeStartRow() {
bitField0_ = (bitField0_ & ~0x00100000);
includeStartRow_ = true;
onChanged();
return this;
}
// optional bool include_stop_row = 22 [default = false];
private boolean includeStopRow_ ;
/**
* <code>optional bool include_stop_row = 22 [default = false];</code>
*/
public boolean hasIncludeStopRow() {
return ((bitField0_ & 0x00200000) == 0x00200000);
}
/**
* <code>optional bool include_stop_row = 22 [default = false];</code>
*/
public boolean getIncludeStopRow() {
return includeStopRow_;
}
/**
* <code>optional bool include_stop_row = 22 [default = false];</code>
*/
public Builder setIncludeStopRow(boolean value) {
bitField0_ |= 0x00200000;
includeStopRow_ = value;
onChanged();
return this;
}
/**
* <code>optional bool include_stop_row = 22 [default = false];</code>
*/
public Builder clearIncludeStopRow() {
bitField0_ = (bitField0_ & ~0x00200000);
includeStopRow_ = false;
onChanged();
return this;
}
// optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];
private org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType readType_ = org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType.DEFAULT;
/**
* <code>optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];</code>
*/
public boolean hasReadType() {
return ((bitField0_ & 0x00400000) == 0x00400000);
}
/**
* <code>optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];</code>
*/
public org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType getReadType() {
return readType_;
}
/**
* <code>optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];</code>
*/
public Builder setReadType(org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType value) {
if (value == null) {
throw new NullPointerException();
}
bitField0_ |= 0x00400000;
readType_ = value;
onChanged();
return this;
}
/**
* <code>optional .hbase.pb.Scan.ReadType readType = 23 [default = DEFAULT];</code>
*/
public Builder clearReadType() {
bitField0_ = (bitField0_ & ~0x00400000);
readType_ = org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.ReadType.DEFAULT;
onChanged();
return this;
}
// @@protoc_insertion_point(builder_scope:hbase.pb.Scan)
}
@ -17403,6 +17773,24 @@ public final class ClientProtos {
* <code>optional bool renew = 10 [default = false];</code>
*/
boolean getRenew();
// optional uint32 limit_of_rows = 11 [default = 0];
/**
* <code>optional uint32 limit_of_rows = 11 [default = 0];</code>
*
* <pre>
* if we have returned limit_of_rows rows to client, then close the scanner.
* </pre>
*/
boolean hasLimitOfRows();
/**
* <code>optional uint32 limit_of_rows = 11 [default = 0];</code>
*
* <pre>
* if we have returned limit_of_rows rows to client, then close the scanner.
* </pre>
*/
int getLimitOfRows();
}
/**
* Protobuf type {@code hbase.pb.ScanRequest}
@ -17534,6 +17922,11 @@ public final class ClientProtos {
renew_ = input.readBool();
break;
}
case 88: {
bitField0_ |= 0x00000400;
limitOfRows_ = input.readUInt32();
break;
}
}
}
} catch (com.google.protobuf.InvalidProtocolBufferException e) {
@ -17746,6 +18139,30 @@ public final class ClientProtos {
return renew_;
}
// optional uint32 limit_of_rows = 11 [default = 0];
public static final int LIMIT_OF_ROWS_FIELD_NUMBER = 11;
private int limitOfRows_;
/**
* <code>optional uint32 limit_of_rows = 11 [default = 0];</code>
*
* <pre>
* if we have returned limit_of_rows rows to client, then close the scanner.
* </pre>
*/
public boolean hasLimitOfRows() {
return ((bitField0_ & 0x00000400) == 0x00000400);
}
/**
* <code>optional uint32 limit_of_rows = 11 [default = 0];</code>
*
* <pre>
* if we have returned limit_of_rows rows to client, then close the scanner.
* </pre>
*/
public int getLimitOfRows() {
return limitOfRows_;
}
private void initFields() {
region_ = org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionSpecifier.getDefaultInstance();
scan_ = org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Scan.getDefaultInstance();
@ -17757,6 +18174,7 @@ public final class ClientProtos {
clientHandlesHeartbeats_ = false;
trackScanMetrics_ = false;
renew_ = false;
limitOfRows_ = 0;
}
private byte memoizedIsInitialized = -1;
public final boolean isInitialized() {
@ -17812,6 +18230,9 @@ public final class ClientProtos {
if (((bitField0_ & 0x00000200) == 0x00000200)) {
output.writeBool(10, renew_);
}
if (((bitField0_ & 0x00000400) == 0x00000400)) {
output.writeUInt32(11, limitOfRows_);
}
getUnknownFields().writeTo(output);
}
@ -17861,6 +18282,10 @@ public final class ClientProtos {
size += com.google.protobuf.CodedOutputStream
.computeBoolSize(10, renew_);
}
if (((bitField0_ & 0x00000400) == 0x00000400)) {
size += com.google.protobuf.CodedOutputStream
.computeUInt32Size(11, limitOfRows_);
}
size += getUnknownFields().getSerializedSize();
memoizedSerializedSize = size;
return size;
@ -17934,6 +18359,11 @@ public final class ClientProtos {
result = result && (getRenew()
== other.getRenew());
}
result = result && (hasLimitOfRows() == other.hasLimitOfRows());
if (hasLimitOfRows()) {
result = result && (getLimitOfRows()
== other.getLimitOfRows());
}
result = result &&
getUnknownFields().equals(other.getUnknownFields());
return result;
@ -17987,6 +18417,10 @@ public final class ClientProtos {
hash = (37 * hash) + RENEW_FIELD_NUMBER;
hash = (53 * hash) + hashBoolean(getRenew());
}
if (hasLimitOfRows()) {
hash = (37 * hash) + LIMIT_OF_ROWS_FIELD_NUMBER;
hash = (53 * hash) + getLimitOfRows();
}
hash = (29 * hash) + getUnknownFields().hashCode();
memoizedHashCode = hash;
return hash;
@ -18139,6 +18573,8 @@ public final class ClientProtos {
bitField0_ = (bitField0_ & ~0x00000100);
renew_ = false;
bitField0_ = (bitField0_ & ~0x00000200);
limitOfRows_ = 0;
bitField0_ = (bitField0_ & ~0x00000400);
return this;
}
@ -18215,6 +18651,10 @@ public final class ClientProtos {
to_bitField0_ |= 0x00000200;
}
result.renew_ = renew_;
if (((from_bitField0_ & 0x00000400) == 0x00000400)) {
to_bitField0_ |= 0x00000400;
}
result.limitOfRows_ = limitOfRows_;
result.bitField0_ = to_bitField0_;
onBuilt();
return result;
@ -18261,6 +18701,9 @@ public final class ClientProtos {
if (other.hasRenew()) {
setRenew(other.getRenew());
}
if (other.hasLimitOfRows()) {
setLimitOfRows(other.getLimitOfRows());
}
this.mergeUnknownFields(other.getUnknownFields());
return this;
}
@ -18798,6 +19241,55 @@ public final class ClientProtos {
return this;
}
// optional uint32 limit_of_rows = 11 [default = 0];
private int limitOfRows_ ;
/**
* <code>optional uint32 limit_of_rows = 11 [default = 0];</code>
*
* <pre>
* if we have returned limit_of_rows rows to client, then close the scanner.
* </pre>
*/
public boolean hasLimitOfRows() {
return ((bitField0_ & 0x00000400) == 0x00000400);
}
/**
* <code>optional uint32 limit_of_rows = 11 [default = 0];</code>
*
* <pre>
* if we have returned limit_of_rows rows to client, then close the scanner.
* </pre>
*/
public int getLimitOfRows() {
return limitOfRows_;
}
/**
* <code>optional uint32 limit_of_rows = 11 [default = 0];</code>
*
* <pre>
* if we have returned limit_of_rows rows to client, then close the scanner.
* </pre>
*/
public Builder setLimitOfRows(int value) {
bitField0_ |= 0x00000400;
limitOfRows_ = value;
onChanged();
return this;
}
/**
* <code>optional uint32 limit_of_rows = 11 [default = 0];</code>
*
* <pre>
* if we have returned limit_of_rows rows to client, then close the scanner.
* </pre>
*/
public Builder clearLimitOfRows() {
bitField0_ = (bitField0_ & ~0x00000400);
limitOfRows_ = 0;
onChanged();
return this;
}
// @@protoc_insertion_point(builder_scope:hbase.pb.ScanRequest)
}
@ -35899,8 +36391,8 @@ public final class ClientProtos {
"\0132\027.hbase.pb.MutationProto\022&\n\tcondition\030" +
"\003 \001(\0132\023.hbase.pb.Condition\022\023\n\013nonce_grou" +
"p\030\004 \001(\004\"E\n\016MutateResponse\022 \n\006result\030\001 \001(" +
"\0132\020.hbase.pb.Result\022\021\n\tprocessed\030\002 \001(\010\"\331" +
"\004\n\004Scan\022 \n\006column\030\001 \003(\0132\020.hbase.pb.Colum" +
"\0132\020.hbase.pb.Result\022\021\n\tprocessed\030\002 \001(\010\"\377" +
"\005\n\004Scan\022 \n\006column\030\001 \003(\0132\020.hbase.pb.Colum" +
"n\022*\n\tattribute\030\002 \003(\0132\027.hbase.pb.NameByte" +
"sPair\022\021\n\tstart_row\030\003 \001(\014\022\020\n\010stop_row\030\004 \001" +
"(\014\022 \n\006filter\030\005 \001(\0132\020.hbase.pb.Filter\022\'\n\n" +
@ -35915,81 +36407,86 @@ public final class ClientProtos {
"g\030\021 \001(\r\022\035\n\025allow_partial_results\030\022 \001(\010\0226" +
"\n\rcf_time_range\030\023 \003(\0132\037.hbase.pb.ColumnF" +
"amilyTimeRange\022\032\n\017mvcc_read_point\030\024 \001(\004:",
"\0010\"\246\002\n\013ScanRequest\022)\n\006region\030\001 \001(\0132\031.hba" +
"se.pb.RegionSpecifier\022\034\n\004scan\030\002 \001(\0132\016.hb" +
"ase.pb.Scan\022\022\n\nscanner_id\030\003 \001(\004\022\026\n\016numbe" +
"r_of_rows\030\004 \001(\r\022\025\n\rclose_scanner\030\005 \001(\010\022\025" +
"\n\rnext_call_seq\030\006 \001(\004\022\037\n\027client_handles_" +
"partials\030\007 \001(\010\022!\n\031client_handles_heartbe" +
"ats\030\010 \001(\010\022\032\n\022track_scan_metrics\030\t \001(\010\022\024\n" +
"\005renew\030\n \001(\010:\005false\"\266\002\n\014ScanResponse\022\030\n\020" +
"cells_per_result\030\001 \003(\r\022\022\n\nscanner_id\030\002 \001" +
"(\004\022\024\n\014more_results\030\003 \001(\010\022\013\n\003ttl\030\004 \001(\r\022!\n",
"\007results\030\005 \003(\0132\020.hbase.pb.Result\022\r\n\005stal" +
"e\030\006 \001(\010\022\037\n\027partial_flag_per_result\030\007 \003(\010" +
"\022\036\n\026more_results_in_region\030\010 \001(\010\022\031\n\021hear" +
"tbeat_message\030\t \001(\010\022+\n\014scan_metrics\030\n \001(" +
"\0132\025.hbase.pb.ScanMetrics\022\032\n\017mvcc_read_po" +
"int\030\013 \001(\004:\0010\"\305\001\n\024BulkLoadHFileRequest\022)\n" +
"\006region\030\001 \002(\0132\031.hbase.pb.RegionSpecifier" +
"\022>\n\013family_path\030\002 \003(\0132).hbase.pb.BulkLoa" +
"dHFileRequest.FamilyPath\022\026\n\016assign_seq_n" +
"um\030\003 \001(\010\032*\n\nFamilyPath\022\016\n\006family\030\001 \002(\014\022\014",
"\n\004path\030\002 \002(\t\"\'\n\025BulkLoadHFileResponse\022\016\n" +
"\006loaded\030\001 \002(\010\"a\n\026CoprocessorServiceCall\022" +
"\013\n\003row\030\001 \002(\014\022\024\n\014service_name\030\002 \002(\t\022\023\n\013me" +
"thod_name\030\003 \002(\t\022\017\n\007request\030\004 \002(\014\"B\n\030Copr" +
"ocessorServiceResult\022&\n\005value\030\001 \001(\0132\027.hb" +
"ase.pb.NameBytesPair\"v\n\031CoprocessorServi" +
"ceRequest\022)\n\006region\030\001 \002(\0132\031.hbase.pb.Reg" +
"ionSpecifier\022.\n\004call\030\002 \002(\0132 .hbase.pb.Co" +
"processorServiceCall\"o\n\032CoprocessorServi" +
"ceResponse\022)\n\006region\030\001 \002(\0132\031.hbase.pb.Re",
"gionSpecifier\022&\n\005value\030\002 \002(\0132\027.hbase.pb." +
"NameBytesPair\"\226\001\n\006Action\022\r\n\005index\030\001 \001(\r\022" +
")\n\010mutation\030\002 \001(\0132\027.hbase.pb.MutationPro" +
"to\022\032\n\003get\030\003 \001(\0132\r.hbase.pb.Get\0226\n\014servic" +
"e_call\030\004 \001(\0132 .hbase.pb.CoprocessorServi" +
"ceCall\"k\n\014RegionAction\022)\n\006region\030\001 \002(\0132\031" +
".hbase.pb.RegionSpecifier\022\016\n\006atomic\030\002 \001(" +
"\010\022 \n\006action\030\003 \003(\0132\020.hbase.pb.Action\"c\n\017R" +
"egionLoadStats\022\027\n\014memstoreLoad\030\001 \001(\005:\0010\022" +
"\030\n\rheapOccupancy\030\002 \001(\005:\0010\022\035\n\022compactionP",
"ressure\030\003 \001(\005:\0010\"j\n\024MultiRegionLoadStats" +
"\022)\n\006region\030\001 \003(\0132\031.hbase.pb.RegionSpecif" +
"ier\022\'\n\004stat\030\002 \003(\0132\031.hbase.pb.RegionLoadS" +
"tats\"\336\001\n\021ResultOrException\022\r\n\005index\030\001 \001(" +
"\r\022 \n\006result\030\002 \001(\0132\020.hbase.pb.Result\022*\n\te" +
"xception\030\003 \001(\0132\027.hbase.pb.NameBytesPair\022" +
":\n\016service_result\030\004 \001(\0132\".hbase.pb.Copro" +
"cessorServiceResult\0220\n\tloadStats\030\005 \001(\0132\031" +
".hbase.pb.RegionLoadStatsB\002\030\001\"x\n\022RegionA" +
"ctionResult\0226\n\021resultOrException\030\001 \003(\0132\033",
".hbase.pb.ResultOrException\022*\n\texception" +
"\030\002 \001(\0132\027.hbase.pb.NameBytesPair\"x\n\014Multi" +
"Request\022,\n\014regionAction\030\001 \003(\0132\026.hbase.pb" +
".RegionAction\022\022\n\nnonceGroup\030\002 \001(\004\022&\n\tcon" +
"dition\030\003 \001(\0132\023.hbase.pb.Condition\"\226\001\n\rMu" +
"ltiResponse\0228\n\022regionActionResult\030\001 \003(\0132" +
"\034.hbase.pb.RegionActionResult\022\021\n\tprocess" +
"ed\030\002 \001(\010\0228\n\020regionStatistics\030\003 \001(\0132\036.hba" +
"se.pb.MultiRegionLoadStats*\'\n\013Consistenc" +
"y\022\n\n\006STRONG\020\000\022\014\n\010TIMELINE\020\0012\203\004\n\rClientSe",
"rvice\0222\n\003Get\022\024.hbase.pb.GetRequest\032\025.hba" +
"se.pb.GetResponse\022;\n\006Mutate\022\027.hbase.pb.M" +
"utateRequest\032\030.hbase.pb.MutateResponse\0225" +
"\n\004Scan\022\025.hbase.pb.ScanRequest\032\026.hbase.pb" +
".ScanResponse\022P\n\rBulkLoadHFile\022\036.hbase.p" +
"b.BulkLoadHFileRequest\032\037.hbase.pb.BulkLo" +
"adHFileResponse\022X\n\013ExecService\022#.hbase.p" +
"b.CoprocessorServiceRequest\032$.hbase.pb.C" +
"oprocessorServiceResponse\022d\n\027ExecRegionS" +
"erverService\022#.hbase.pb.CoprocessorServi",
"ceRequest\032$.hbase.pb.CoprocessorServiceR" +
"esponse\0228\n\005Multi\022\026.hbase.pb.MultiRequest" +
"\032\027.hbase.pb.MultiResponseBB\n*org.apache." +
"hadoop.hbase.protobuf.generatedB\014ClientP" +
"rotosH\001\210\001\001\240\001\001"
"\0010\022\037\n\021include_start_row\030\025 \001(\010:\004true\022\037\n\020i" +
"nclude_stop_row\030\026 \001(\010:\005false\0222\n\010readType" +
"\030\027 \001(\0162\027.hbase.pb.Scan.ReadType:\007DEFAULT" +
"\".\n\010ReadType\022\013\n\007DEFAULT\020\000\022\n\n\006STREAM\020\001\022\t\n" +
"\005PREAD\020\002\"\300\002\n\013ScanRequest\022)\n\006region\030\001 \001(\013" +
"2\031.hbase.pb.RegionSpecifier\022\034\n\004scan\030\002 \001(" +
"\0132\016.hbase.pb.Scan\022\022\n\nscanner_id\030\003 \001(\004\022\026\n" +
"\016number_of_rows\030\004 \001(\r\022\025\n\rclose_scanner\030\005" +
" \001(\010\022\025\n\rnext_call_seq\030\006 \001(\004\022\037\n\027client_ha" +
"ndles_partials\030\007 \001(\010\022!\n\031client_handles_h",
"eartbeats\030\010 \001(\010\022\032\n\022track_scan_metrics\030\t " +
"\001(\010\022\024\n\005renew\030\n \001(\010:\005false\022\030\n\rlimit_of_ro" +
"ws\030\013 \001(\r:\0010\"\266\002\n\014ScanResponse\022\030\n\020cells_pe" +
"r_result\030\001 \003(\r\022\022\n\nscanner_id\030\002 \001(\004\022\024\n\014mo" +
"re_results\030\003 \001(\010\022\013\n\003ttl\030\004 \001(\r\022!\n\007results" +
"\030\005 \003(\0132\020.hbase.pb.Result\022\r\n\005stale\030\006 \001(\010\022" +
"\037\n\027partial_flag_per_result\030\007 \003(\010\022\036\n\026more" +
"_results_in_region\030\010 \001(\010\022\031\n\021heartbeat_me" +
"ssage\030\t \001(\010\022+\n\014scan_metrics\030\n \001(\0132\025.hbas" +
"e.pb.ScanMetrics\022\032\n\017mvcc_read_point\030\013 \001(",
"\004:\0010\"\305\001\n\024BulkLoadHFileRequest\022)\n\006region\030" +
"\001 \002(\0132\031.hbase.pb.RegionSpecifier\022>\n\013fami" +
"ly_path\030\002 \003(\0132).hbase.pb.BulkLoadHFileRe" +
"quest.FamilyPath\022\026\n\016assign_seq_num\030\003 \001(\010" +
"\032*\n\nFamilyPath\022\016\n\006family\030\001 \002(\014\022\014\n\004path\030\002" +
" \002(\t\"\'\n\025BulkLoadHFileResponse\022\016\n\006loaded\030" +
"\001 \002(\010\"a\n\026CoprocessorServiceCall\022\013\n\003row\030\001" +
" \002(\014\022\024\n\014service_name\030\002 \002(\t\022\023\n\013method_nam" +
"e\030\003 \002(\t\022\017\n\007request\030\004 \002(\014\"B\n\030CoprocessorS" +
"erviceResult\022&\n\005value\030\001 \001(\0132\027.hbase.pb.N",
"ameBytesPair\"v\n\031CoprocessorServiceReques" +
"t\022)\n\006region\030\001 \002(\0132\031.hbase.pb.RegionSpeci" +
"fier\022.\n\004call\030\002 \002(\0132 .hbase.pb.Coprocesso" +
"rServiceCall\"o\n\032CoprocessorServiceRespon" +
"se\022)\n\006region\030\001 \002(\0132\031.hbase.pb.RegionSpec" +
"ifier\022&\n\005value\030\002 \002(\0132\027.hbase.pb.NameByte" +
"sPair\"\226\001\n\006Action\022\r\n\005index\030\001 \001(\r\022)\n\010mutat" +
"ion\030\002 \001(\0132\027.hbase.pb.MutationProto\022\032\n\003ge" +
"t\030\003 \001(\0132\r.hbase.pb.Get\0226\n\014service_call\030\004" +
" \001(\0132 .hbase.pb.CoprocessorServiceCall\"k",
"\n\014RegionAction\022)\n\006region\030\001 \002(\0132\031.hbase.p" +
"b.RegionSpecifier\022\016\n\006atomic\030\002 \001(\010\022 \n\006act" +
"ion\030\003 \003(\0132\020.hbase.pb.Action\"c\n\017RegionLoa" +
"dStats\022\027\n\014memstoreLoad\030\001 \001(\005:\0010\022\030\n\rheapO" +
"ccupancy\030\002 \001(\005:\0010\022\035\n\022compactionPressure\030" +
"\003 \001(\005:\0010\"j\n\024MultiRegionLoadStats\022)\n\006regi" +
"on\030\001 \003(\0132\031.hbase.pb.RegionSpecifier\022\'\n\004s" +
"tat\030\002 \003(\0132\031.hbase.pb.RegionLoadStats\"\336\001\n" +
"\021ResultOrException\022\r\n\005index\030\001 \001(\r\022 \n\006res" +
"ult\030\002 \001(\0132\020.hbase.pb.Result\022*\n\texception",
"\030\003 \001(\0132\027.hbase.pb.NameBytesPair\022:\n\016servi" +
"ce_result\030\004 \001(\0132\".hbase.pb.CoprocessorSe" +
"rviceResult\0220\n\tloadStats\030\005 \001(\0132\031.hbase.p" +
"b.RegionLoadStatsB\002\030\001\"x\n\022RegionActionRes" +
"ult\0226\n\021resultOrException\030\001 \003(\0132\033.hbase.p" +
"b.ResultOrException\022*\n\texception\030\002 \001(\0132\027" +
".hbase.pb.NameBytesPair\"x\n\014MultiRequest\022" +
",\n\014regionAction\030\001 \003(\0132\026.hbase.pb.RegionA" +
"ction\022\022\n\nnonceGroup\030\002 \001(\004\022&\n\tcondition\030\003" +
" \001(\0132\023.hbase.pb.Condition\"\226\001\n\rMultiRespo",
"nse\0228\n\022regionActionResult\030\001 \003(\0132\034.hbase." +
"pb.RegionActionResult\022\021\n\tprocessed\030\002 \001(\010" +
"\0228\n\020regionStatistics\030\003 \001(\0132\036.hbase.pb.Mu" +
"ltiRegionLoadStats*\'\n\013Consistency\022\n\n\006STR" +
"ONG\020\000\022\014\n\010TIMELINE\020\0012\203\004\n\rClientService\0222\n" +
"\003Get\022\024.hbase.pb.GetRequest\032\025.hbase.pb.Ge" +
"tResponse\022;\n\006Mutate\022\027.hbase.pb.MutateReq" +
"uest\032\030.hbase.pb.MutateResponse\0225\n\004Scan\022\025" +
".hbase.pb.ScanRequest\032\026.hbase.pb.ScanRes" +
"ponse\022P\n\rBulkLoadHFile\022\036.hbase.pb.BulkLo",
"adHFileRequest\032\037.hbase.pb.BulkLoadHFileR" +
"esponse\022X\n\013ExecService\022#.hbase.pb.Coproc" +
"essorServiceRequest\032$.hbase.pb.Coprocess" +
"orServiceResponse\022d\n\027ExecRegionServerSer" +
"vice\022#.hbase.pb.CoprocessorServiceReques" +
"t\032$.hbase.pb.CoprocessorServiceResponse\022" +
"8\n\005Multi\022\026.hbase.pb.MultiRequest\032\027.hbase" +
".pb.MultiResponseBB\n*org.apache.hadoop.h" +
"base.protobuf.generatedB\014ClientProtosH\001\210" +
"\001\001\240\001\001"
};
com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {
@ -36079,13 +36576,13 @@ public final class ClientProtos {
internal_static_hbase_pb_Scan_fieldAccessorTable = new
com.google.protobuf.GeneratedMessage.FieldAccessorTable(
internal_static_hbase_pb_Scan_descriptor,
new java.lang.String[] { "Column", "Attribute", "StartRow", "StopRow", "Filter", "TimeRange", "MaxVersions", "CacheBlocks", "BatchSize", "MaxResultSize", "StoreLimit", "StoreOffset", "LoadColumnFamiliesOnDemand", "Small", "Reversed", "Consistency", "Caching", "AllowPartialResults", "CfTimeRange", "MvccReadPoint", });
new java.lang.String[] { "Column", "Attribute", "StartRow", "StopRow", "Filter", "TimeRange", "MaxVersions", "CacheBlocks", "BatchSize", "MaxResultSize", "StoreLimit", "StoreOffset", "LoadColumnFamiliesOnDemand", "Small", "Reversed", "Consistency", "Caching", "AllowPartialResults", "CfTimeRange", "MvccReadPoint", "IncludeStartRow", "IncludeStopRow", "ReadType", });
internal_static_hbase_pb_ScanRequest_descriptor =
getDescriptor().getMessageTypes().get(12);
internal_static_hbase_pb_ScanRequest_fieldAccessorTable = new
com.google.protobuf.GeneratedMessage.FieldAccessorTable(
internal_static_hbase_pb_ScanRequest_descriptor,
new java.lang.String[] { "Region", "Scan", "ScannerId", "NumberOfRows", "CloseScanner", "NextCallSeq", "ClientHandlesPartials", "ClientHandlesHeartbeats", "TrackScanMetrics", "Renew", });
new java.lang.String[] { "Region", "Scan", "ScannerId", "NumberOfRows", "CloseScanner", "NextCallSeq", "ClientHandlesPartials", "ClientHandlesHeartbeats", "TrackScanMetrics", "Renew", "LimitOfRows", });
internal_static_hbase_pb_ScanResponse_descriptor =
getDescriptor().getMessageTypes().get(13);
internal_static_hbase_pb_ScanResponse_fieldAccessorTable = new

11
hbase-protocol/src/main/protobuf/Client.proto
View File

@ -260,6 +260,15 @@ message Scan {
optional bool allow_partial_results = 18;
repeated ColumnFamilyTimeRange cf_time_range = 19;
optional uint64 mvcc_read_point = 20 [default = 0];
optional bool include_start_row = 21 [default = true];
optional bool include_stop_row = 22 [default = false];
enum ReadType {
DEFAULT = 0;
STREAM = 1;
PREAD = 2;
}
optional ReadType readType = 23 [default = DEFAULT];
}
/**
@ -284,6 +293,8 @@ message ScanRequest {
optional bool client_handles_heartbeats = 8;
optional bool track_scan_metrics = 9;
optional bool renew = 10 [default = false];
// if we have returned limit_of_rows rows to client, then close the scanner.
optional uint32 limit_of_rows = 11 [default = 0];
}
/**

165
hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/SyncTable.java
View File

@ -63,27 +63,27 @@ public class SyncTable extends Configured implements Tool {
static final String SOURCE_ZK_CLUSTER_CONF_KEY = "sync.table.source.zk.cluster";
static final String TARGET_ZK_CLUSTER_CONF_KEY = "sync.table.target.zk.cluster";
static final String DRY_RUN_CONF_KEY="sync.table.dry.run";
Path sourceHashDir;
String sourceTableName;
String targetTableName;
String sourceZkCluster;
String targetZkCluster;
boolean dryRun;
Counters counters;
public SyncTable(Configuration conf) {
super(conf);
}
public Job createSubmittableJob(String[] args) throws IOException {
FileSystem fs = sourceHashDir.getFileSystem(getConf());
if (!fs.exists(sourceHashDir)) {
throw new IOException("Source hash dir not found: " + sourceHashDir);
}
HashTable.TableHash tableHash = HashTable.TableHash.read(getConf(), sourceHashDir);
LOG.info("Read source hash manifest: " + tableHash);
LOG.info("Read " + tableHash.partitions.size() + " partition keys");
@ -97,7 +97,7 @@ public class SyncTable extends Configured implements Tool {
+ " says numHashFiles=" + tableHash.numHashFiles + " but the number of partition keys"
+ " found in the partitions file is " + tableHash.partitions.size());
}
Path dataDir = new Path(sourceHashDir, HashTable.HASH_DATA_DIR);
int dataSubdirCount = 0;
for (FileStatus file : fs.listStatus(dataDir)) {
@ -105,14 +105,14 @@ public class SyncTable extends Configured implements Tool {
dataSubdirCount++;
}
}
if (dataSubdirCount != tableHash.numHashFiles) {
throw new RuntimeException("Hash data appears corrupt. The number of of hash files created"
+ " should be 1 more than the number of partition keys. However, the number of data dirs"
+ " found is " + dataSubdirCount + " but the number of partition keys"
+ " found in the partitions file is " + tableHash.partitions.size());
}
Job job = Job.getInstance(getConf(),getConf().get("mapreduce.job.name",
"syncTable_" + sourceTableName + "-" + targetTableName));
Configuration jobConf = job.getConfiguration();
@ -127,12 +127,12 @@ public class SyncTable extends Configured implements Tool {
jobConf.set(TARGET_ZK_CLUSTER_CONF_KEY, targetZkCluster);
}
jobConf.setBoolean(DRY_RUN_CONF_KEY, dryRun);
TableMapReduceUtil.initTableMapperJob(targetTableName, tableHash.initScan(),
SyncMapper.class, null, null, job);
job.setNumReduceTasks(0);
if (dryRun) {
job.setOutputFormatClass(NullOutputFormat.class);
} else {
@ -140,37 +140,37 @@ public class SyncTable extends Configured implements Tool {
// because it sets up the TableOutputFormat.
TableMapReduceUtil.initTableReducerJob(targetTableName, null, job, null,
targetZkCluster, null, null);
// would be nice to add an option for bulk load instead
}
return job;
}
public static class SyncMapper extends TableMapper<ImmutableBytesWritable, Mutation> {
Path sourceHashDir;
Connection sourceConnection;
Connection targetConnection;
Table sourceTable;
Table targetTable;
boolean dryRun;
HashTable.TableHash sourceTableHash;
HashTable.TableHash.Reader sourceHashReader;
ImmutableBytesWritable currentSourceHash;
ImmutableBytesWritable nextSourceKey;
HashTable.ResultHasher targetHasher;
Throwable mapperException;
public static enum Counter {BATCHES, HASHES_MATCHED, HASHES_NOT_MATCHED, SOURCEMISSINGROWS,
SOURCEMISSINGCELLS, TARGETMISSINGROWS, TARGETMISSINGCELLS, ROWSWITHDIFFS, DIFFERENTCELLVALUES,
MATCHINGROWS, MATCHINGCELLS, EMPTY_BATCHES, RANGESMATCHED, RANGESNOTMATCHED};
@Override
protected void setup(Context context) throws IOException {
Configuration conf = context.getConfiguration();
sourceHashDir = new Path(conf.get(SOURCE_HASH_DIR_CONF_KEY));
sourceConnection = openConnection(conf, SOURCE_ZK_CLUSTER_CONF_KEY, null);
@ -179,23 +179,23 @@ public class SyncTable extends Configured implements Tool {
sourceTable = openTable(sourceConnection, conf, SOURCE_TABLE_CONF_KEY);
targetTable = openTable(targetConnection, conf, TARGET_TABLE_CONF_KEY);
dryRun = conf.getBoolean(SOURCE_TABLE_CONF_KEY, false);
sourceTableHash = HashTable.TableHash.read(conf, sourceHashDir);
LOG.info("Read source hash manifest: " + sourceTableHash);
LOG.info("Read " + sourceTableHash.partitions.size() + " partition keys");
TableSplit split = (TableSplit) context.getInputSplit();
ImmutableBytesWritable splitStartKey = new ImmutableBytesWritable(split.getStartRow());
sourceHashReader = sourceTableHash.newReader(conf, splitStartKey);
findNextKeyHashPair();
// create a hasher, but don't start it right away
// instead, find the first hash batch at or after the start row
// and skip any rows that come before. they will be caught by the previous task
targetHasher = new HashTable.ResultHasher();
}
private static Connection openConnection(Configuration conf, String zkClusterConfKey,
String configPrefix)
throws IOException {
@ -204,12 +204,12 @@ public class SyncTable extends Configured implements Tool {
zkCluster, configPrefix);
return ConnectionFactory.createConnection(clusterConf);
}
private static Table openTable(Connection connection, Configuration conf,
String tableNameConfKey) throws IOException {
return connection.getTable(TableName.valueOf(conf.get(tableNameConfKey)));
}
/**
* Attempt to read the next source key/hash pair.
* If there are no more, set nextSourceKey to null
@ -223,7 +223,7 @@ public class SyncTable extends Configured implements Tool {
nextSourceKey = null;
}
}
@Override
protected void map(ImmutableBytesWritable key, Result value, Context context)
throws IOException, InterruptedException {
@ -232,7 +232,7 @@ public class SyncTable extends Configured implements Tool {
while (nextSourceKey != null && key.compareTo(nextSourceKey) >= 0) {
moveToNextBatch(context);
}
// next, add the scanned row (as long as we've reached the first batch)
if (targetHasher.isBatchStarted()) {
targetHasher.hashResult(value);
@ -247,7 +247,7 @@ public class SyncTable extends Configured implements Tool {
/**
* If there is an open hash batch, complete it and sync if there are diffs.
* Start a new batch, and seek to read the
* Start a new batch, and seek to read the
*/
private void moveToNextBatch(Context context) throws IOException, InterruptedException {
if (targetHasher.isBatchStarted()) {
@ -255,7 +255,7 @@ public class SyncTable extends Configured implements Tool {
}
targetHasher.startBatch(nextSourceKey);
currentSourceHash = sourceHashReader.getCurrentHash();
findNextKeyHashPair();
}
@ -276,28 +276,28 @@ public class SyncTable extends Configured implements Tool {
context.getCounter(Counter.HASHES_MATCHED).increment(1);
} else {
context.getCounter(Counter.HASHES_NOT_MATCHED).increment(1);
ImmutableBytesWritable stopRow = nextSourceKey == null
? new ImmutableBytesWritable(sourceTableHash.stopRow)
: nextSourceKey;
if (LOG.isDebugEnabled()) {
LOG.debug("Hash mismatch. Key range: " + toHex(targetHasher.getBatchStartKey())
+ " to " + toHex(stopRow)
+ " sourceHash: " + toHex(currentSourceHash)
+ " targetHash: " + toHex(targetHash));
}
syncRange(context, targetHasher.getBatchStartKey(), stopRow);
}
}
private static String toHex(ImmutableBytesWritable bytes) {
return Bytes.toHex(bytes.get(), bytes.getOffset(), bytes.getLength());
}
private static final CellScanner EMPTY_CELL_SCANNER
= new CellScanner(Iterators.<Result>emptyIterator());
/**
* Rescan the given range directly from the source and target tables.
* Count and log differences, and if this is not a dry run, output Puts and Deletes
@ -305,17 +305,16 @@ public class SyncTable extends Configured implements Tool {
*/
private void syncRange(Context context, ImmutableBytesWritable startRow,
ImmutableBytesWritable stopRow) throws IOException, InterruptedException {
Scan scan = sourceTableHash.initScan();
scan.setStartRow(startRow.copyBytes());
scan.setStopRow(stopRow.copyBytes());
ResultScanner sourceScanner = sourceTable.getScanner(scan);
CellScanner sourceCells = new CellScanner(sourceScanner.iterator());
ResultScanner targetScanner = targetTable.getScanner(scan);
ResultScanner targetScanner = targetTable.getScanner(new Scan(scan));
CellScanner targetCells = new CellScanner(targetScanner.iterator());
boolean rangeMatched = true;
byte[] nextSourceRow = sourceCells.nextRow();
byte[] nextTargetRow = targetCells.nextRow();
@ -327,7 +326,7 @@ public class SyncTable extends Configured implements Tool {
LOG.info("Target missing row: " + Bytes.toHex(nextSourceRow));
}
context.getCounter(Counter.TARGETMISSINGROWS).increment(1);
rowMatched = syncRowCells(context, nextSourceRow, sourceCells, EMPTY_CELL_SCANNER);
nextSourceRow = sourceCells.nextRow(); // advance only source to next row
} else if (rowComparison > 0) {
@ -335,41 +334,41 @@ public class SyncTable extends Configured implements Tool {
LOG.info("Source missing row: " + Bytes.toHex(nextTargetRow));
}
context.getCounter(Counter.SOURCEMISSINGROWS).increment(1);
rowMatched = syncRowCells(context, nextTargetRow, EMPTY_CELL_SCANNER, targetCells);
nextTargetRow = targetCells.nextRow(); // advance only target to next row
} else {
// current row is the same on both sides, compare cell by cell
rowMatched = syncRowCells(context, nextSourceRow, sourceCells, targetCells);
nextSourceRow = sourceCells.nextRow();
nextSourceRow = sourceCells.nextRow();
nextTargetRow = targetCells.nextRow();
}
if (!rowMatched) {
rangeMatched = false;
}
}
sourceScanner.close();
targetScanner.close();
context.getCounter(rangeMatched ? Counter.RANGESMATCHED : Counter.RANGESNOTMATCHED)
.increment(1);
}
private static class CellScanner {
private final Iterator<Result> results;
private byte[] currentRow;
private Result currentRowResult;
private int nextCellInRow;
private Result nextRowResult;
public CellScanner(Iterator<Result> results) {
this.results = results;
}
/**
* Advance to the next row and return its row key.
* Returns null iff there are no more rows.
@ -390,7 +389,7 @@ public class SyncTable extends Configured implements Tool {
nextRowResult = null;
}
}
if (nextRowResult == null) {
// end of data, no more rows
currentRowResult = null;
@ -398,7 +397,7 @@ public class SyncTable extends Configured implements Tool {
return null;
}
}
// advance to cached result for next row
currentRowResult = nextRowResult;
nextCellInRow = 0;
@ -406,7 +405,7 @@ public class SyncTable extends Configured implements Tool {
nextRowResult = null;
return currentRow;
}
/**
* Returns the next Cell in the current row or null iff none remain.
*/
@ -415,7 +414,7 @@ public class SyncTable extends Configured implements Tool {
// nothing left in current row
return null;
}
Cell nextCell = currentRowResult.rawCells()[nextCellInRow];
nextCellInRow++;
if (nextCellInRow == currentRowResult.size()) {
@ -441,7 +440,7 @@ public class SyncTable extends Configured implements Tool {
return nextCell;
}
}
/**
* Compare the cells for the given row from the source and target tables.
* Count and log any differences.
@ -465,14 +464,14 @@ public class SyncTable extends Configured implements Tool {
}
context.getCounter(Counter.TARGETMISSINGCELLS).increment(1);
matchingRow = false;
if (!dryRun) {
if (put == null) {
put = new Put(rowKey);
}
put.add(sourceCell);
}
sourceCell = sourceCells.nextCellInRow();
} else if (cellKeyComparison > 0) {
if (LOG.isDebugEnabled()) {
@ -480,7 +479,7 @@ public class SyncTable extends Configured implements Tool {
}
context.getCounter(Counter.SOURCEMISSINGCELLS).increment(1);
matchingRow = false;
if (!dryRun) {
if (delete == null) {
delete = new Delete(rowKey);
@ -489,7 +488,7 @@ public class SyncTable extends Configured implements Tool {
delete.addColumn(CellUtil.cloneFamily(targetCell),
CellUtil.cloneQualifier(targetCell), targetCell.getTimestamp());
}
targetCell = targetCells.nextCellInRow();
} else {
// the cell keys are equal, now check values
@ -507,7 +506,7 @@ public class SyncTable extends Configured implements Tool {
}
context.getCounter(Counter.DIFFERENTCELLVALUES).increment(1);
matchingRow = false;
if (!dryRun) {
// overwrite target cell
if (put == null) {
@ -519,7 +518,7 @@ public class SyncTable extends Configured implements Tool {
sourceCell = sourceCells.nextCellInRow();
targetCell = targetCells.nextCellInRow();
}
if (!dryRun && sourceTableHash.scanBatch > 0) {
if (put != null && put.size() >= sourceTableHash.scanBatch) {
context.write(new ImmutableBytesWritable(rowKey), put);
@ -531,7 +530,7 @@ public class SyncTable extends Configured implements Tool {
}
}
}
if (!dryRun) {
if (put != null) {
context.write(new ImmutableBytesWritable(rowKey), put);
@ -540,7 +539,7 @@ public class SyncTable extends Configured implements Tool {
context.write(new ImmutableBytesWritable(rowKey), delete);
}
}
if (matchingCells > 0) {
context.getCounter(Counter.MATCHINGCELLS).increment(matchingCells);
}
@ -580,21 +579,21 @@ public class SyncTable extends Configured implements Tool {
if (c2 == null) {
return -1; // target missing cell
}
int result = CellComparator.compareFamilies(c1, c2);
if (result != 0) {
return result;
}
result = CellComparator.compareQualifiers(c1, c2);
if (result != 0) {
return result;
}
// note timestamp comparison is inverted - more recent cells first
return CellComparator.compareTimestamps(c1, c2);
}
@Override
protected void cleanup(Context context)
throws IOException, InterruptedException {
@ -605,7 +604,7 @@ public class SyncTable extends Configured implements Tool {
mapperException = t;
}
}
try {
sourceTable.close();
targetTable.close();
@ -618,7 +617,7 @@ public class SyncTable extends Configured implements Tool {
LOG.error("Suppressing exception from closing tables", t);
}
}
// propagate first exception
if (mapperException != null) {
Throwables.propagateIfInstanceOf(mapperException, IOException.class);
@ -638,7 +637,7 @@ public class SyncTable extends Configured implements Tool {
&& (nextSourceKey.compareTo(splitEndRow) < 0 || reachedEndOfTable)) {
moveToNextBatch(context);
}
if (targetHasher.isBatchStarted()) {
// need to complete the final open hash batch
@ -653,7 +652,7 @@ public class SyncTable extends Configured implements Tool {
} else {
scan.setStopRow(nextSourceKey.copyBytes());
}
ResultScanner targetScanner = null;
try {
targetScanner = targetTable.getScanner(scan);
@ -671,7 +670,7 @@ public class SyncTable extends Configured implements Tool {
}
}
}
private static final int NUM_ARGS = 3;
private static void printUsage(final String errorMsg) {
if (errorMsg != null && errorMsg.length() > 0) {
@ -681,7 +680,7 @@ public class SyncTable extends Configured implements Tool {
System.err.println("Usage: SyncTable [options] <sourcehashdir> <sourcetable> <targettable>");
System.err.println();
System.err.println("Options:");
System.err.println(" sourcezkcluster ZK cluster key of the source table");
System.err.println(" (defaults to cluster in classpath's config)");
System.err.println(" targetzkcluster ZK cluster key of the target table");
@ -703,7 +702,7 @@ public class SyncTable extends Configured implements Tool {
+ " --sourcezkcluster=zk1.example.com,zk2.example.com,zk3.example.com:2181:/hbase"
+ " hdfs://nn:9000/hashes/tableA tableA tableA");
}
private boolean doCommandLine(final String[] args) {
if (args.length < NUM_ARGS) {
printUsage(null);
@ -713,37 +712,37 @@ public class SyncTable extends Configured implements Tool {
sourceHashDir = new Path(args[args.length - 3]);
sourceTableName = args[args.length - 2];
targetTableName = args[args.length - 1];
for (int i = 0; i < args.length - NUM_ARGS; i++) {
String cmd = args[i];
if (cmd.equals("-h") || cmd.startsWith("--h")) {
printUsage(null);
return false;
}
final String sourceZkClusterKey = "--sourcezkcluster=";
if (cmd.startsWith(sourceZkClusterKey)) {
sourceZkCluster = cmd.substring(sourceZkClusterKey.length());
continue;
}
final String targetZkClusterKey = "--targetzkcluster=";
if (cmd.startsWith(targetZkClusterKey)) {
targetZkCluster = cmd.substring(targetZkClusterKey.length());
continue;
}
final String dryRunKey = "--dryrun=";
if (cmd.startsWith(dryRunKey)) {
dryRun = Boolean.parseBoolean(cmd.substring(dryRunKey.length()));
continue;
}
printUsage("Invalid argument '" + cmd + "'");
return false;
}
} catch (Exception e) {
e.printStackTrace();
printUsage("Can't start because " + e.getMessage());
@ -751,7 +750,7 @@ public class SyncTable extends Configured implements Tool {
}
return true;
}
/**
* Main entry point.
*/

46
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
View File

@ -274,11 +274,13 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
private final String scannerName;
private final RegionScanner s;
private final Region r;
private final boolean allowPartial;
public RegionScannerHolder(String scannerName, RegionScanner s, Region r) {
public RegionScannerHolder(String scannerName, RegionScanner s, Region r, boolean allowPartial) {
this.scannerName = scannerName;
this.s = s;
this.r = r;
this.allowPartial = allowPartial;
}
public long getNextCallSeq() {
@ -1110,11 +1112,11 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
return lastBlock;
}
private RegionScannerHolder addScanner(String scannerName, RegionScanner s, Region r)
throws LeaseStillHeldException {
private RegionScannerHolder addScanner(String scannerName, RegionScanner s, Region r,
boolean allowPartial) throws LeaseStillHeldException {
regionServer.leases.createLease(scannerName, this.scannerLeaseTimeoutPeriod,
new ScannerListener(scannerName));
RegionScannerHolder rsh = new RegionScannerHolder(scannerName, s, r);
RegionScannerHolder rsh = new RegionScannerHolder(scannerName, s, r, allowPartial);
RegionScannerHolder existing = scanners.putIfAbsent(scannerName, rsh);
assert existing == null : "scannerId must be unique within regionserver's whole lifecycle!";
return rsh;
@ -2460,8 +2462,8 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
return rsh;
}
private Pair<RegionScannerHolder, Boolean> newRegionScanner(ScanRequest request,
ScanResponse.Builder builder) throws IOException {
private RegionScannerHolder newRegionScanner(ScanRequest request, ScanResponse.Builder builder)
throws IOException {
Region region = getRegion(request.getRegion());
ClientProtos.Scan protoScan = request.getScan();
boolean isLoadingCfsOnDemandSet = protoScan.hasLoadColumnFamiliesOnDemand();
@ -2491,7 +2493,8 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
builder.setMvccReadPoint(scanner.getMvccReadPoint());
builder.setTtl(scannerLeaseTimeoutPeriod);
String scannerName = String.valueOf(scannerId);
return Pair.newPair(addScanner(scannerName, scanner, region), scan.isSmall());
return addScanner(scannerName, scanner, region,
!scan.isSmall() && !(request.hasLimitOfRows() && request.getLimitOfRows() > 0));
}
private void checkScanNextCallSeq(ScanRequest request, RegionScannerHolder rsh)
@ -2548,9 +2551,9 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
// return whether we have more results in region.
private boolean scan(PayloadCarryingRpcController controller, ScanRequest request,
RegionScannerHolder rsh, boolean isSmallScan, long maxQuotaResultSize, int rows,
List<Result> results, ScanResponse.Builder builder, MutableObject lastBlock,
RpcCallContext context) throws IOException {
RegionScannerHolder rsh, long maxQuotaResultSize, int rows, List<Result> results,
ScanResponse.Builder builder, MutableObject lastBlock, RpcCallContext context)
throws IOException {
Region region = rsh.r;
RegionScanner scanner = rsh.s;
long maxResultSize;
@ -2581,7 +2584,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
// formed.
boolean serverGuaranteesOrderOfPartials = results.isEmpty();
boolean allowPartialResults =
clientHandlesPartials && serverGuaranteesOrderOfPartials && !isSmallScan;
clientHandlesPartials && serverGuaranteesOrderOfPartials && rsh.allowPartial;
boolean moreRows = false;
// Heartbeat messages occur when the processing of the ScanRequest is exceeds a
@ -2738,15 +2741,11 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
rpcScanRequestCount.increment();
RegionScannerHolder rsh;
ScanResponse.Builder builder = ScanResponse.newBuilder();
boolean isSmallScan;
try {
if (request.hasScannerId()) {
rsh = getRegionScanner(request);
isSmallScan = false;
} else {
Pair<RegionScannerHolder, Boolean> pair = newRegionScanner(request, builder);
rsh = pair.getFirst();
isSmallScan = pair.getSecond().booleanValue();
rsh = newRegionScanner(request, builder);
}
} catch (IOException e) {
if (e == SCANNER_ALREADY_CLOSED) {
@ -2805,6 +2804,15 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
RegionScanner scanner = rsh.s;
boolean moreResults = true;
boolean moreResultsInRegion = true;
// this is the limit of rows for this scan, if we the number of rows reach this value, we will
// close the scanner.
int limitOfRows;
if (request.hasLimitOfRows()) {
limitOfRows = request.getLimitOfRows();
rows = Math.min(rows, limitOfRows);
} else {
limitOfRows = -1;
}
MutableObject lastBlock = new MutableObject();
boolean scannerClosed = false;
try {
@ -2825,7 +2833,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
}
if (!done) {
moreResultsInRegion = scan((PayloadCarryingRpcController) controller, request, rsh,
isSmallScan, maxQuotaResultSize, rows, results, builder, lastBlock, context);
maxQuotaResultSize, rows, results, builder, lastBlock, context);
}
}
@ -2837,6 +2845,10 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
// with the old scan implementation where we just ignore the returned results if moreResults
// is false. Can remove the isEmpty check after we get rid of the old implementation.
moreResults = false;
} else if (limitOfRows > 0 && results.size() >= limitOfRows &&
!results.get(results.size() - 1).isPartial()) {
// if we have reached the limit of rows
moreResults = false;
}
addResults(builder, results, (PayloadCarryingRpcController) controller,
RegionReplicaUtil.isDefaultReplica(region.getRegionInfo()));

5
hbase-server/src/main/java/org/apache/hadoop/hbase/tool/Canary.java
View File

@ -77,6 +77,7 @@ import org.apache.hadoop.hbase.client.RegionLocator;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.client.Scan.ReadType;
import org.apache.hadoop.hbase.filter.FirstKeyOnlyFilter;
import org.apache.hadoop.hbase.tool.Canary.RegionTask.TaskType;
import org.apache.hadoop.hbase.util.Bytes;
@ -365,7 +366,7 @@ public final class Canary implements Tool {
scan.setFilter(new FirstKeyOnlyFilter());
scan.addFamily(column.getName());
scan.setMaxResultSize(1L);
scan.setSmall(true);
scan.setOneRowLimit();
}
if (LOG.isDebugEnabled()) {
@ -500,7 +501,7 @@ public final class Canary implements Tool {
scan.setFilter(new FirstKeyOnlyFilter());
scan.setCaching(1);
scan.setMaxResultSize(1L);
scan.setSmall(true);
scan.setOneRowLimit();
stopWatch.start();
ResultScanner s = table.getScanner(scan);
s.next();

25
hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
View File

@ -2427,14 +2427,17 @@ public class HBaseTestingUtility extends HBaseCommonTestingUtility {
* Return the number of rows in the given table.
*/
public int countRows(final Table table) throws IOException {
Scan scan = new Scan();
ResultScanner results = table.getScanner(scan);
int count = 0;
for (@SuppressWarnings("unused") Result res : results) {
count++;
return countRows(table, new Scan());
}
public int countRows(final Table table, final Scan scan) throws IOException {
try (ResultScanner results = table.getScanner(scan)) {
int count = 0;
while (results.next() != null) {
count++;
}
return count;
}
results.close();
return count;
}
public int countRows(final Table table, final byte[]... families) throws IOException {
@ -2442,13 +2445,7 @@ public class HBaseTestingUtility extends HBaseCommonTestingUtility {
for (byte[] family: families) {
scan.addFamily(family);
}
ResultScanner results = table.getScanner(scan);
int count = 0;
for (@SuppressWarnings("unused") Result res : results) {
count++;
}
results.close();
return count;
return countRows(table, scan);
}
/**

2
hbase-server/src/test/java/org/apache/hadoop/hbase/TestMetaTableAccessorNoCluster.java
View File

@ -166,7 +166,7 @@ public class TestMetaTableAccessorNoCluster {
public ScanResponse answer(InvocationOnMock invocation) throws Throwable {
((PayloadCarryingRpcController) invocation.getArguments()[0]).setCellScanner(CellUtil
.createCellScanner(cellScannables));
return builder.build();
return builder.setScannerId(1234567890L).build();
}
}).thenReturn(ScanResponse.newBuilder().setMoreResults(false).build());
// Associate a spied-upon HConnection with UTIL.getConfiguration. Need

12
hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
View File

@ -607,7 +607,6 @@ public class TestPartialResultsFromClientSide {
scan.setAllowPartialResults(true);
scan.setSmall(true);
scan.setMaxResultSize(1);
ResultScanner scanner = TABLE.getScanner(scan);
Result r = null;
@ -731,11 +730,13 @@ public class TestPartialResultsFromClientSide {
byte[] value = Bytes.createMaxByteArray(100);
Table tmpTable = createTestTable(testName, rows, families, qualifiers, value);
// Open scanner before deletes
ResultScanner scanner =
tmpTable.getScanner(new Scan().setMaxResultSize(1).setAllowPartialResults(true));
// now the openScanner will also fetch data and will be executed lazily, i.e, only openScanner
// when you call next, so here we need to make a next call to open scanner. The maxResultSize
// limit can make sure that we will not fetch all the data at once, so the test sill works.
int scannerCount = scanner.next().rawCells().length;
Delete delete1 = new Delete(rows[0]);
delete1.addColumn(families[0], qualifiers[0], 0);
tmpTable.delete(delete1);
@ -745,7 +746,7 @@ public class TestPartialResultsFromClientSide {
tmpTable.delete(delete2);
// Should see all cells because scanner was opened prior to deletes
int scannerCount = countCellsFromScanner(scanner);
scannerCount += countCellsFromScanner(scanner);
int expectedCount = numRows * numFamilies * numQualifiers;
assertTrue("scannerCount: " + scannerCount + " expectedCount: " + expectedCount,
scannerCount == expectedCount);
@ -758,6 +759,7 @@ public class TestPartialResultsFromClientSide {
scannerCount == expectedCount);
scanner = tmpTable.getScanner(new Scan().setMaxResultSize(1).setAllowPartialResults(true));
scannerCount = scanner.next().rawCells().length;
// Put in 2 new rows. The timestamps differ from the deleted rows
Put put1 = new Put(rows[0]);
put1.add(new KeyValue(rows[0], families[0], qualifiers[0], 1, value));
@ -768,7 +770,7 @@ public class TestPartialResultsFromClientSide {
tmpTable.put(put2);
// Scanner opened prior to puts. Cell count shouldn't have changed
scannerCount = countCellsFromScanner(scanner);
scannerCount += countCellsFromScanner(scanner);
expectedCount = numRows * numFamilies * numQualifiers - 2;
assertTrue("scannerCount: " + scannerCount + " expectedCount: " + expectedCount,
scannerCount == expectedCount);

5
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientScannerRPCTimeout.java
View File

@ -85,9 +85,11 @@ public class TestClientScannerRPCTimeout {
public void testScannerNextRPCTimesout() throws Exception {
final TableName TABLE_NAME = TableName.valueOf("testScannerNextRPCTimesout");
Table ht = TEST_UTIL.createTable(TABLE_NAME, FAMILY);
byte[] r0 = Bytes.toBytes("row-0");
byte[] r1 = Bytes.toBytes("row-1");
byte[] r2 = Bytes.toBytes("row-2");
byte[] r3 = Bytes.toBytes("row-3");
putToTable(ht, r0);
putToTable(ht, r1);
putToTable(ht, r2);
putToTable(ht, r3);
@ -97,6 +99,9 @@ public class TestClientScannerRPCTimeout {
scan.setCaching(1);
ResultScanner scanner = ht.getScanner(scan);
Result result = scanner.next();
// fetched when openScanner
assertTrue("Expected row: row-0", Bytes.equals(r0, result.getRow()));
result = scanner.next();
assertTrue("Expected row: row-1", Bytes.equals(r1, result.getRow()));
LOG.info("Got expected first row");
long t1 = System.currentTimeMillis();

2
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java
View File

@ -6108,7 +6108,7 @@ public class TestFromClientSide {
public void testReversedScanUnderMultiRegions() throws Exception {
// Test Initialization.
TableName TABLE = TableName.valueOf("testReversedScanUnderMultiRegions");
byte[] maxByteArray = ReversedClientScanner.MAX_BYTE_ARRAY;
byte[] maxByteArray = ConnectionUtils.MAX_BYTE_ARRAY;
byte[][] splitRows = new byte[][] { Bytes.toBytes("005"),
Bytes.add(Bytes.toBytes("005"), Bytes.multiple(maxByteArray, 16)),
Bytes.toBytes("006"),

4
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestLeaseRenewal.java
View File

@ -106,8 +106,8 @@ public class TestLeaseRenewal {
Scan s = new Scan();
s.setCaching(1);
ResultScanner rs = table.getScanner(s);
// make sure that calling renewLease does not impact the scan results
assertTrue(((AbstractClientScanner)rs).renewLease());
// we haven't open the scanner yet so nothing happens
assertFalse(((AbstractClientScanner) rs).renewLease());
assertTrue(Arrays.equals(rs.next().getRow(), ANOTHERROW));
// renew the lease a few times, long enough to be sure
// the lease would have expired otherwise

2
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerMetrics.java
View File

@ -169,7 +169,7 @@ public class TestRegionServerMetrics {
// By default, master doesn't host meta now.
// Adding some meta related requests
requests += 3;
requests += 1;
readRequests ++;
metricsRegionServer.getRegionServerWrapper().forceRecompute();

6
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerWithBulkload.java
View File

@ -21,8 +21,6 @@ import java.io.IOException;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import junit.framework.Assert;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
@ -46,6 +44,7 @@ import org.apache.hadoop.hbase.io.hfile.HFileContext;
import org.apache.hadoop.hbase.mapreduce.LoadIncrementalHFiles;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
@ -199,6 +198,7 @@ public class TestScannerWithBulkload {
HBaseAdmin admin = new HBaseAdmin(TEST_UTIL.getConfiguration());
createTable(admin, tableName);
Scan scan = createScan();
scan.setCaching(1);
final HTable table = init(admin, l, scan, tableName);
// use bulkload
final Path hfilePath = writeToHFile(l, "/temp/testBulkLoadWithParallelScan/",
@ -207,6 +207,7 @@ public class TestScannerWithBulkload {
conf.setBoolean("hbase.mapreduce.bulkload.assign.sequenceNumbers", true);
final LoadIncrementalHFiles bulkload = new LoadIncrementalHFiles(conf);
ResultScanner scanner = table.getScanner(scan);
Result result = scanner.next();
// Create a scanner and then do bulk load
final CountDownLatch latch = new CountDownLatch(1);
new Thread() {
@ -226,7 +227,6 @@ public class TestScannerWithBulkload {
latch.await();
// By the time we do next() the bulk loaded files are also added to the kv
// scanner
Result result = scanner.next();
scanAfterBulkLoad(scanner, result, "version1");
scanner.close();
table.close();

1
hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java
View File

@ -947,7 +947,6 @@ public class TestAccessController extends SecureTestUtil {
for (Result r = scanner.next(); r != null; r = scanner.next()) {
// do nothing
}
} catch (IOException e) {
} finally {
scanner.close();
}

3
hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController2.java
View File

@ -381,6 +381,7 @@ public class TestAccessController2 extends SecureTestUtil {
Scan s1 = new Scan();
s1.addFamily(TEST_FAMILY_2);
try (ResultScanner scanner1 = table.getScanner(s1);) {
scanner1.next();
}
}
return null;
@ -411,6 +412,7 @@ public class TestAccessController2 extends SecureTestUtil {
Scan s1 = new Scan();
s1.addFamily(TEST_FAMILY_2);
try (ResultScanner scanner1 = table.getScanner(s1);) {
scanner1.next();
}
}
return null;
@ -425,6 +427,7 @@ public class TestAccessController2 extends SecureTestUtil {
Scan s1 = new Scan();
s1.addColumn(TEST_FAMILY, Q2);
try (ResultScanner scanner1 = table.getScanner(s1);) {
scanner1.next();
}
}
return null;