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HBASE-11574. hbase:meta's regions can be replicated

This commit is contained in:
Devaraj Das 2015-01-27 16:40:29 -08:00
parent 0f6faaf5fc
commit 6b20a0f831
29 changed files with 1131 additions and 154 deletions
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14
hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
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@ -30,6 +30,7 @@ import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.KeyValue.KVComparator;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.client.RegionReplicaUtil;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.master.RegionState;
@ -219,12 +220,16 @@ public class HRegionInfo implements Comparable<HRegionInfo> {
* first meta regions
*/
private HRegionInfo(long regionId, TableName tableName) {
this(regionId, tableName, DEFAULT_REPLICA_ID);
}
public HRegionInfo(long regionId, TableName tableName, int replicaId) {
super();
this.regionId = regionId;
this.tableName = tableName;
// Note: First Meta regions names are still in old format
this.regionName = createRegionName(tableName, null,
regionId, false);
this.replicaId = replicaId;
// Note: First Meta region replicas names are in old format
this.regionName = createRegionName(tableName, null, regionId, replicaId, false);
setHashCode();
}
@ -914,7 +919,8 @@ public class HRegionInfo implements Comparable<HRegionInfo> {
TableName tableName =
ProtobufUtil.toTableName(proto.getTableName());
if (tableName.equals(TableName.META_TABLE_NAME)) {
return FIRST_META_REGIONINFO;
return RegionReplicaUtil.getRegionInfoForReplica(FIRST_META_REGIONINFO,
proto.getReplicaId());
}
long regionId = proto.getRegionId();
int replicaId = proto.hasReplicaId() ? proto.getReplicaId() : DEFAULT_REPLICA_ID;

4
hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java
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@ -1095,7 +1095,7 @@ public class MetaTableAccessor {
* Adds a (single) hbase:meta row for the specified new region and its daughters. Note that this
* does not add its daughter's as different rows, but adds information about the daughters
* in the same row as the parent. Use
* {@link #splitRegion(Connection, HRegionInfo, HRegionInfo, HRegionInfo, ServerName, int)
* {@link #splitRegion(Connection, HRegionInfo, HRegionInfo, HRegionInfo, ServerName, int)}
* if you want to do that.
* @param meta the Table for META
* @param regionInfo region information
@ -1117,7 +1117,7 @@ public class MetaTableAccessor {
* Adds a (single) hbase:meta row for the specified new region and its daughters. Note that this
* does not add its daughter's as different rows, but adds information about the daughters
* in the same row as the parent. Use
* {@link #splitRegion(Connection, HRegionInfo, HRegionInfo, HRegionInfo, ServerName, int)
* {@link #splitRegion(Connection, HRegionInfo, HRegionInfo, HRegionInfo, ServerName, int)}
* if you want to do that.
* @param connection connection we're using
* @param regionInfo region information

10
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionManager.java
View File

@ -551,6 +551,7 @@ final class ConnectionManager {
static class HConnectionImplementation implements ClusterConnection, Closeable {
static final Log LOG = LogFactory.getLog(HConnectionImplementation.class);
private final long pause;
private final boolean useMetaReplicas;
private final int numTries;
final int rpcTimeout;
private NonceGenerator nonceGenerator = null;
@ -674,6 +675,8 @@ final class ConnectionManager {
this.closed = false;
this.pause = conf.getLong(HConstants.HBASE_CLIENT_PAUSE,
HConstants.DEFAULT_HBASE_CLIENT_PAUSE);
this.useMetaReplicas = conf.getBoolean(HConstants.USE_META_REPLICAS,
HConstants.DEFAULT_USE_META_REPLICAS);
this.numTries = tableConfig.getRetriesNumber();
this.rpcTimeout = conf.getInt(
HConstants.HBASE_RPC_TIMEOUT_KEY,
@ -1132,7 +1135,7 @@ final class ConnectionManager {
RegionLocations locations = null;
if (useCache) {
locations = getCachedLocation(tableName, metaCacheKey);
if (locations != null) {
if (locations != null && locations.getRegionLocation(replicaId) != null) {
return locations;
}
}
@ -1143,7 +1146,7 @@ final class ConnectionManager {
// same query while we were waiting on the lock.
if (useCache) {
locations = getCachedLocation(tableName, metaCacheKey);
if (locations != null) {
if (locations != null && locations.getRegionLocation(replicaId) != null) {
return locations;
}
}
@ -1183,6 +1186,9 @@ final class ConnectionManager {
s.setStartRow(metaKey);
s.setSmall(true);
s.setCaching(1);
if (this.useMetaReplicas) {
s.setConsistency(Consistency.TIMELINE);
}
int localNumRetries = (retry ? numTries : 1);

3
hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
View File

@ -421,9 +421,6 @@ public class HBaseAdmin implements Admin {
public HTableDescriptor getTableDescriptor(final TableName tableName)
throws TableNotFoundException, IOException {
if (tableName == null) return null;
if (tableName.equals(TableName.META_TABLE_NAME)) {
return HTableDescriptor.META_TABLEDESC;
}
HTableDescriptor htd = executeCallable(new MasterCallable<HTableDescriptor>(getConnection()) {
@Override
public HTableDescriptor call(int callTimeout) throws ServiceException {

1
hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnectionKey.java
View File

@ -49,6 +49,7 @@ class HConnectionKey {
HConstants.HBASE_META_SCANNER_CACHING,
HConstants.HBASE_CLIENT_INSTANCE_ID,
HConstants.RPC_CODEC_CONF_KEY,
HConstants.USE_META_REPLICAS,
RpcControllerFactory.CUSTOM_CONTROLLER_CONF_KEY};
private Map<String, String> properties;

13
hbase-client/src/main/java/org/apache/hadoop/hbase/client/MetaScanner.java
View File

@ -153,7 +153,9 @@ public final class MetaScanner {
try (Table metaTable = new HTable(TableName.META_TABLE_NAME, connection, null)) {
if (row != null) {
// Scan starting at a particular row in a particular table
Result startRowResult = getClosestRowOrBefore(metaTable, tableName, row);
Result startRowResult = getClosestRowOrBefore(metaTable, tableName, row,
connection.getConfiguration().getBoolean(HConstants.USE_META_REPLICAS,
HConstants.DEFAULT_USE_META_REPLICAS));
if (startRowResult == null) {
throw new TableNotFoundException("Cannot find row in " + metaTable.getName() +
" for table: " + tableName + ", row=" + Bytes.toStringBinary(row));
@ -177,6 +179,10 @@ public final class MetaScanner {
int scannerCaching = connection.getConfiguration()
.getInt(HConstants.HBASE_META_SCANNER_CACHING,
HConstants.DEFAULT_HBASE_META_SCANNER_CACHING);
if (connection.getConfiguration().getBoolean(HConstants.USE_META_REPLICAS,
HConstants.DEFAULT_USE_META_REPLICAS)) {
scan.setConsistency(Consistency.TIMELINE);
}
if (rowUpperLimit <= scannerCaching) {
scan.setSmall(true);
}
@ -215,10 +221,13 @@ public final class MetaScanner {
* @throws IOException
*/
private static Result getClosestRowOrBefore(final Table metaTable, final TableName userTableName,
final byte [] row)
final byte [] row, boolean useMetaReplicas)
throws IOException {
byte[] searchRow = HRegionInfo.createRegionName(userTableName, row, HConstants.NINES, false);
Scan scan = Scan.createGetClosestRowOrBeforeReverseScan(searchRow);
if (useMetaReplicas) {
scan.setConsistency(Consistency.TIMELINE);
}
try (ResultScanner resultScanner = metaTable.getScanner(scan)) {
return resultScanner.next();
}

10
hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionReplicaUtil.java
View File

@ -47,9 +47,13 @@ public class RegionReplicaUtil {
if (regionInfo.getReplicaId() == replicaId) {
return regionInfo;
}
HRegionInfo replicaInfo = new HRegionInfo(regionInfo.getTable(), regionInfo.getStartKey(),
regionInfo.getEndKey(), regionInfo.isSplit(), regionInfo.getRegionId(), replicaId);
HRegionInfo replicaInfo;
if (regionInfo.isMetaRegion()) {
replicaInfo = new HRegionInfo(regionInfo.getRegionId(), regionInfo.getTable(), replicaId);
} else {
replicaInfo = new HRegionInfo(regionInfo.getTable(), regionInfo.getStartKey(),
regionInfo.getEndKey(), regionInfo.isSplit(), regionInfo.getRegionId(), replicaId);
}
replicaInfo.setOffline(regionInfo.isOffline());
return replicaInfo;
}

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

@ -272,7 +272,7 @@ class ScannerCallableWithReplicas implements RetryingCallable<Result[]> {
return 0; // not scheduling on other replicas for strong consistency
}
for (int id = min; id <= max; id++) {
if (currentScannerCallable.getHRegionInfo().getReplicaId() == id) {
if (currentScannerCallable.id == id) {
continue; //this was already scheduled earlier
}
ScannerCallable s = currentScannerCallable.getScannerCallableForReplica(id);

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

@ -18,6 +18,7 @@
package org.apache.hadoop.hbase.client;
import java.io.IOException;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@ -54,14 +55,32 @@ class ZooKeeperRegistry implements Registry {
if (LOG.isTraceEnabled()) {
LOG.trace("Looking up meta region location in ZK," + " connection=" + this);
}
ServerName servername = new MetaTableLocator().blockUntilAvailable(zkw, hci.rpcTimeout);
List<ServerName> servers = new MetaTableLocator().blockUntilAvailable(zkw, hci.rpcTimeout,
hci.getConfiguration());
if (LOG.isTraceEnabled()) {
LOG.trace("Looked up meta region location, connection=" + this +
"; serverName=" + ((servername == null) ? "null" : servername));
if (servers == null) {
LOG.trace("Looked up meta region location, connection=" + this +
"; servers = null");
} else {
StringBuilder str = new StringBuilder();
for (ServerName s : servers) {
str.append(s.toString());
str.append(" ");
}
LOG.trace("Looked up meta region location, connection=" + this +
"; servers = " + str.toString());
}
}
if (servername == null) return null;
HRegionLocation loc = new HRegionLocation(HRegionInfo.FIRST_META_REGIONINFO, servername, 0);
return new RegionLocations(new HRegionLocation[] {loc});
if (servers == null) return null;
HRegionLocation[] locs = new HRegionLocation[servers.size()];
int i = 0;
for (ServerName server : servers) {
HRegionInfo h = RegionReplicaUtil.getRegionInfoForReplica(
HRegionInfo.FIRST_META_REGIONINFO, i);
if (server == null) locs[i++] = null;
else locs[i++] = new HRegionLocation(h, server, 0);
}
return new RegionLocations(locs);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return null;

201
hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/MetaTableLocator.java
View File

@ -30,12 +30,14 @@ import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.NotAllMetaRegionsOnlineException;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.client.HConnection;
import org.apache.hadoop.hbase.client.RegionReplicaUtil;
import org.apache.hadoop.hbase.client.RetriesExhaustedException;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.ipc.FailedServerException;
@ -75,9 +77,6 @@ import com.google.protobuf.InvalidProtocolBufferException;
public class MetaTableLocator {
private static final Log LOG = LogFactory.getLog(MetaTableLocator.class);
static final byte [] META_REGION_NAME =
HRegionInfo.FIRST_META_REGIONINFO.getRegionName();
// only needed to allow non-timeout infinite waits to stop when cluster shuts down
private volatile boolean stopped = false;
@ -94,9 +93,21 @@ public class MetaTableLocator {
* @return meta table regions and their locations.
*/
public List<Pair<HRegionInfo, ServerName>> getMetaRegionsAndLocations(ZooKeeperWatcher zkw) {
ServerName serverName = new MetaTableLocator().getMetaRegionLocation(zkw);
return getMetaRegionsAndLocations(zkw, HRegionInfo.DEFAULT_REPLICA_ID);
}
/**
*
* @param zkw
* @param replicaId
* @return meta table regions and their locations.
*/
public List<Pair<HRegionInfo, ServerName>> getMetaRegionsAndLocations(ZooKeeperWatcher zkw,
int replicaId) {
ServerName serverName = getMetaRegionLocation(zkw, replicaId);
List<Pair<HRegionInfo, ServerName>> list = new ArrayList<Pair<HRegionInfo, ServerName>>();
list.add(new Pair<HRegionInfo, ServerName>(HRegionInfo.FIRST_META_REGIONINFO, serverName));
list.add(new Pair<HRegionInfo, ServerName>(RegionReplicaUtil.getRegionInfoForReplica(
HRegionInfo.FIRST_META_REGIONINFO, replicaId), serverName));
return list;
}
@ -105,8 +116,18 @@ public class MetaTableLocator {
* @return List of meta regions
*/
public List<HRegionInfo> getMetaRegions(ZooKeeperWatcher zkw) {
return getMetaRegions(zkw, HRegionInfo.DEFAULT_REPLICA_ID);
}
/**
*
* @param zkw
* @param replicaId
* @return List of meta regions
*/
public List<HRegionInfo> getMetaRegions(ZooKeeperWatcher zkw, int replicaId) {
List<Pair<HRegionInfo, ServerName>> result;
result = getMetaRegionsAndLocations(zkw);
result = getMetaRegionsAndLocations(zkw, replicaId);
return getListOfHRegionInfos(result);
}
@ -134,17 +155,52 @@ public class MetaTableLocator {
}
}
/**
* Gets the meta region location, if available. Does not block.
* @param zkw
* @param replicaId
* @return server name
*/
public ServerName getMetaRegionLocation(final ZooKeeperWatcher zkw, int replicaId) {
try {
RegionState state = getMetaRegionState(zkw, replicaId);
return state.isOpened() ? state.getServerName() : null;
} catch (KeeperException ke) {
return null;
}
}
/**
* Gets the meta region location, if available, and waits for up to the
* specified timeout if not immediately available.
* Given the zookeeper notification could be delayed, we will try to
* get the latest data.
* @param zkw
* @param timeout maximum time to wait, in millis
* @return server name for server hosting meta region formatted as per
* {@link ServerName}, or null if none available
* @throws InterruptedException if interrupted while waiting
* @throws NotAllMetaRegionsOnlineException
*/
public ServerName waitMetaRegionLocation(ZooKeeperWatcher zkw, long timeout)
throws InterruptedException, NotAllMetaRegionsOnlineException {
return waitMetaRegionLocation(zkw, HRegionInfo.DEFAULT_REPLICA_ID, timeout);
}
/**
* Gets the meta region location, if available, and waits for up to the
* specified timeout if not immediately available.
* Given the zookeeper notification could be delayed, we will try to
* get the latest data.
* @param zkw
* @param replicaId
* @param timeout maximum time to wait, in millis
* @return server name for server hosting meta region formatted as per
* {@link ServerName}, or null if none available
* @throws InterruptedException
* @throws NotAllMetaRegionsOnlineException
*/
public ServerName waitMetaRegionLocation(ZooKeeperWatcher zkw, int replicaId, long timeout)
throws InterruptedException, NotAllMetaRegionsOnlineException {
try {
if (ZKUtil.checkExists(zkw, zkw.baseZNode) == -1) {
@ -156,7 +212,7 @@ public class MetaTableLocator {
} catch (KeeperException e) {
throw new IllegalStateException("KeeperException while trying to check baseZNode:", e);
}
ServerName sn = blockUntilAvailable(zkw, timeout);
ServerName sn = blockUntilAvailable(zkw, replicaId, timeout);
if (sn == null) {
throw new NotAllMetaRegionsOnlineException("Timed out; " + timeout + "ms");
@ -193,6 +249,8 @@ public class MetaTableLocator {
/**
* Verify <code>hbase:meta</code> is deployed and accessible.
* @param hConnection
* @param zkw
* @param timeout How long to wait on zk for meta address (passed through to
* the internal call to {@link #getMetaServerConnection}.
* @return True if the <code>hbase:meta</code> location is healthy.
@ -201,10 +259,26 @@ public class MetaTableLocator {
*/
public boolean verifyMetaRegionLocation(HConnection hConnection,
ZooKeeperWatcher zkw, final long timeout)
throws InterruptedException, IOException {
return verifyMetaRegionLocation(hConnection, zkw, timeout, HRegionInfo.DEFAULT_REPLICA_ID);
}
/**
* Verify <code>hbase:meta</code> is deployed and accessible.
* @param hConnection
* @param zkw
* @param timeout How long to wait on zk for meta address (passed through to
* @param replicaId
* @return True if the <code>hbase:meta</code> location is healthy.
* @throws InterruptedException
* @throws IOException
*/
public boolean verifyMetaRegionLocation(HConnection hConnection,
ZooKeeperWatcher zkw, final long timeout, int replicaId)
throws InterruptedException, IOException {
AdminProtos.AdminService.BlockingInterface service = null;
try {
service = getMetaServerConnection(hConnection, zkw, timeout);
service = getMetaServerConnection(hConnection, zkw, timeout, replicaId);
} catch (NotAllMetaRegionsOnlineException e) {
// Pass
} catch (ServerNotRunningYetException e) {
@ -215,7 +289,8 @@ public class MetaTableLocator {
// Pass -- server name sends us to a server that is dying or already dead.
}
return (service != null) && verifyRegionLocation(service,
getMetaRegionLocation(zkw), META_REGION_NAME);
getMetaRegionLocation(zkw, replicaId), RegionReplicaUtil.getRegionInfoForReplica(
HRegionInfo.FIRST_META_REGIONINFO, replicaId).getRegionName());
}
/**
@ -271,16 +346,19 @@ public class MetaTableLocator {
* Gets a connection to the server hosting meta, as reported by ZooKeeper,
* waiting up to the specified timeout for availability.
* <p>WARNING: Does not retry. Use an {@link org.apache.hadoop.hbase.client.HTable} instead.
* @param hConnection
* @param zkw
* @param timeout How long to wait on meta location
* @param replicaId
* @return connection to server hosting meta
* @throws InterruptedException
* @throws NotAllMetaRegionsOnlineException if timed out waiting
* @throws IOException
*/
private AdminService.BlockingInterface getMetaServerConnection(HConnection hConnection,
ZooKeeperWatcher zkw, long timeout)
ZooKeeperWatcher zkw, long timeout, int replicaId)
throws InterruptedException, NotAllMetaRegionsOnlineException, IOException {
return getCachedConnection(hConnection, waitMetaRegionLocation(zkw, timeout));
return getCachedConnection(hConnection, waitMetaRegionLocation(zkw, replicaId, timeout));
}
/**
@ -345,6 +423,20 @@ public class MetaTableLocator {
*/
public static void setMetaLocation(ZooKeeperWatcher zookeeper,
ServerName serverName, RegionState.State state) throws KeeperException {
setMetaLocation(zookeeper, serverName, HRegionInfo.DEFAULT_REPLICA_ID, state);
}
/**
* Sets the location of <code>hbase:meta</code> in ZooKeeper to the
* specified server address.
* @param zookeeper
* @param serverName
* @param replicaId
* @param state
* @throws KeeperException
*/
public static void setMetaLocation(ZooKeeperWatcher zookeeper,
ServerName serverName, int replicaId, RegionState.State state) throws KeeperException {
LOG.info("Setting hbase:meta region location in ZooKeeper as " + serverName);
// Make the MetaRegionServer pb and then get its bytes and save this as
// the znode content.
@ -354,10 +446,15 @@ public class MetaTableLocator {
.setState(state.convert()).build();
byte[] data = ProtobufUtil.prependPBMagic(pbrsr.toByteArray());
try {
ZKUtil.setData(zookeeper, zookeeper.metaServerZNode, data);
ZKUtil.setData(zookeeper, zookeeper.getZNodeForReplica(replicaId), data);
} catch(KeeperException.NoNodeException nne) {
LOG.debug("META region location doesn't existed, create it");
ZKUtil.createAndWatch(zookeeper, zookeeper.metaServerZNode, data);
if (replicaId == HRegionInfo.DEFAULT_REPLICA_ID) {
LOG.debug("META region location doesn't exist, create it");
} else {
LOG.debug("META region location doesn't exist for replicaId " + replicaId +
", create it");
}
ZKUtil.createAndWatch(zookeeper, zookeeper.getZNodeForReplica(replicaId), data);
}
}
@ -365,10 +462,22 @@ public class MetaTableLocator {
* Load the meta region state from the meta server ZNode.
*/
public static RegionState getMetaRegionState(ZooKeeperWatcher zkw) throws KeeperException {
return getMetaRegionState(zkw, HRegionInfo.DEFAULT_REPLICA_ID);
}
/**
* Load the meta region state from the meta server ZNode.
* @param zkw
* @param replicaId
* @return regionstate
* @throws KeeperException
*/
public static RegionState getMetaRegionState(ZooKeeperWatcher zkw, int replicaId)
throws KeeperException {
RegionState.State state = RegionState.State.OPEN;
ServerName serverName = null;
try {
byte[] data = ZKUtil.getData(zkw, zkw.metaServerZNode);
byte[] data = ZKUtil.getData(zkw, zkw.getZNodeForReplica(replicaId));
if (data != null && data.length > 0 && ProtobufUtil.isPBMagicPrefix(data)) {
try {
int prefixLen = ProtobufUtil.lengthOfPBMagic();
@ -396,7 +505,8 @@ public class MetaTableLocator {
if (serverName == null) {
state = RegionState.State.OFFLINE;
}
return new RegionState(HRegionInfo.FIRST_META_REGIONINFO,
return new RegionState(
RegionReplicaUtil.getRegionInfoForReplica(HRegionInfo.FIRST_META_REGIONINFO, replicaId),
state, serverName);
}
@ -407,14 +517,53 @@ public class MetaTableLocator {
*/
public void deleteMetaLocation(ZooKeeperWatcher zookeeper)
throws KeeperException {
LOG.info("Deleting hbase:meta region location in ZooKeeper");
deleteMetaLocation(zookeeper, HRegionInfo.DEFAULT_REPLICA_ID);
}
public void deleteMetaLocation(ZooKeeperWatcher zookeeper, int replicaId)
throws KeeperException {
if (replicaId == HRegionInfo.DEFAULT_REPLICA_ID) {
LOG.info("Deleting hbase:meta region location in ZooKeeper");
} else {
LOG.info("Deleting hbase:meta for " + replicaId + " region location in ZooKeeper");
}
try {
// Just delete the node. Don't need any watches.
ZKUtil.deleteNode(zookeeper, zookeeper.metaServerZNode);
ZKUtil.deleteNode(zookeeper, zookeeper.getZNodeForReplica(replicaId));
} catch(KeeperException.NoNodeException nne) {
// Has already been deleted
}
}
/**
* Wait until the primary meta region is available. Get the secondary
* locations as well but don't block for those.
* @param zkw
* @param timeout
* @param conf
* @return ServerName or null if we timed out.
* @throws InterruptedException
*/
public List<ServerName> blockUntilAvailable(final ZooKeeperWatcher zkw,
final long timeout, Configuration conf)
throws InterruptedException {
int numReplicasConfigured = 1;
try {
List<String> metaReplicaNodes = zkw.getMetaReplicaNodes();
numReplicasConfigured = metaReplicaNodes.size();
} catch (KeeperException e) {
LOG.warn("Got ZK exception " + e);
}
List<ServerName> servers = new ArrayList<ServerName>(numReplicasConfigured);
ServerName server = blockUntilAvailable(zkw, timeout);
if (server == null) return null;
servers.add(server);
for (int replicaId = 1; replicaId < numReplicasConfigured; replicaId++) {
// return all replica locations for the meta
servers.add(getMetaRegionLocation(zkw, replicaId));
}
return servers;
}
/**
* Wait until the meta region is available and is not in transition.
@ -425,6 +574,20 @@ public class MetaTableLocator {
*/
public ServerName blockUntilAvailable(final ZooKeeperWatcher zkw,
final long timeout)
throws InterruptedException {
return blockUntilAvailable(zkw, HRegionInfo.DEFAULT_REPLICA_ID, timeout);
}
/**
* Wait until the meta region is available and is not in transition.
* @param zkw
* @param replicaId
* @param timeout
* @return ServerName or null if we timed out.
* @throws InterruptedException
*/
public ServerName blockUntilAvailable(final ZooKeeperWatcher zkw, int replicaId,
final long timeout)
throws InterruptedException {
if (timeout < 0) throw new IllegalArgumentException();
if (zkw == null) throw new IllegalArgumentException();
@ -432,7 +595,7 @@ public class MetaTableLocator {
ServerName sn = null;
try {
while (true) {
sn = getMetaRegionLocation(zkw);
sn = getMetaRegionLocation(zkw, replicaId);
if (sn != null || sw.elapsedMillis()
> timeout - HConstants.SOCKET_RETRY_WAIT_MS) {
break;

12
hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java
View File

@ -40,6 +40,7 @@ import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
@ -966,7 +967,7 @@ public class ZKUtil {
// Certain znodes are accessed directly by the client,
// so they must be readable by non-authenticated clients
if ((node.equals(zkw.baseZNode) == true) ||
(node.equals(zkw.metaServerZNode) == true) ||
(zkw.isAnyMetaReplicaZnode(node)) ||
(node.equals(zkw.getMasterAddressZNode()) == true) ||
(node.equals(zkw.clusterIdZNode) == true) ||
(node.equals(zkw.rsZNode) == true) ||
@ -1699,6 +1700,13 @@ public class ZKUtil {
}
sb.append("\nRegion server holding hbase:meta: "
+ new MetaTableLocator().getMetaRegionLocation(zkw));
Configuration conf = HBaseConfiguration.create();
int numMetaReplicas = conf.getInt(HConstants.META_REPLICAS_NUM,
HConstants.DEFAULT_META_REPLICA_NUM);
for (int i = 1; i < numMetaReplicas; i++) {
sb.append("\nRegion server holding hbase:meta, replicaId " + i + " "
+ new MetaTableLocator().getMetaRegionLocation(zkw, i));
}
sb.append("\nRegion servers:");
for (String child : listChildrenNoWatch(zkw, zkw.rsZNode)) {
sb.append("\n ").append(child);
@ -1887,7 +1895,7 @@ public class ZKUtil {
" byte(s) of data from znode " + znode +
(watcherSet? " and set watcher; ": "; data=") +
(data == null? "null": data.length == 0? "empty": (
znode.startsWith(zkw.metaServerZNode)?
znode.startsWith(ZooKeeperWatcher.META_ZNODE_PREFIX)?
getServerNameOrEmptyString(data):
znode.startsWith(zkw.backupMasterAddressesZNode)?
getServerNameOrEmptyString(data):

88
hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWatcher.java
View File

@ -22,7 +22,9 @@ import java.io.Closeable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CountDownLatch;
@ -31,6 +33,7 @@ import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Abortable;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.zookeeper.KeeperException;
@ -82,8 +85,8 @@ public class ZooKeeperWatcher implements Watcher, Abortable, Closeable {
// base znode for this cluster
public String baseZNode;
// znode containing location of server hosting meta region
public String metaServerZNode;
//znodes containing the locations of the servers hosting the meta replicas
private Map<Integer,String> metaReplicaZnodes = new HashMap<Integer, String>();
// znode containing ephemeral nodes of the regionservers
public String rsZNode;
// znode containing ephemeral nodes of the draining regionservers
@ -110,6 +113,7 @@ public class ZooKeeperWatcher implements Watcher, Abortable, Closeable {
// znode containing namespace descriptors
public static String namespaceZNode = "namespace";
public final static String META_ZNODE_PREFIX = "meta-region-server";
private final Configuration conf;
@ -200,8 +204,15 @@ public class ZooKeeperWatcher implements Watcher, Abortable, Closeable {
private void setNodeNames(Configuration conf) {
baseZNode = conf.get(HConstants.ZOOKEEPER_ZNODE_PARENT,
HConstants.DEFAULT_ZOOKEEPER_ZNODE_PARENT);
metaServerZNode = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server"));
metaReplicaZnodes.put(0, ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server")));
int numMetaReplicas = conf.getInt(HConstants.META_REPLICAS_NUM,
HConstants.DEFAULT_META_REPLICA_NUM);
for (int i = 1; i < numMetaReplicas; i++) {
String str = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server") + "-" + i);
metaReplicaZnodes.put(i, str);
}
rsZNode = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.rs", "rs"));
drainingZNode = ZKUtil.joinZNode(baseZNode,
@ -228,6 +239,75 @@ public class ZooKeeperWatcher implements Watcher, Abortable, Closeable {
conf.get("zookeeper.znode.namespace", "namespace"));
}
/**
* Is the znode of any meta replica
* @param node
* @return true or false
*/
public boolean isAnyMetaReplicaZnode(String node) {
if (metaReplicaZnodes.values().contains(node)) {
return true;
}
return false;
}
/**
* Is it the default meta replica's znode
* @param node
* @return true or false
*/
public boolean isDefaultMetaReplicaZnode(String node) {
if (getZNodeForReplica(HRegionInfo.DEFAULT_REPLICA_ID).equals(node)) {
return true;
}
return false;
}
/**
* Get the znodes corresponding to the meta replicas from ZK
* @return list of znodes
* @throws KeeperException
*/
public List<String> getMetaReplicaNodes() throws KeeperException {
List<String> childrenOfBaseNode = ZKUtil.listChildrenNoWatch(this, baseZNode);
List<String> metaReplicaNodes = new ArrayList<String>(2);
String pattern = conf.get("zookeeper.znode.metaserver","meta-region-server");
for (String child : childrenOfBaseNode) {
if (child.startsWith(pattern)) metaReplicaNodes.add(child);
}
return metaReplicaNodes;
}
/**
* Get the znode string corresponding to a replicaId
* @param replicaId
* @return znode
*/
public String getZNodeForReplica(int replicaId) {
String str = metaReplicaZnodes.get(replicaId);
// return a newly created path but don't update the cache of paths
// This is mostly needed for tests that attempt to create meta replicas
// from outside the master
if (str == null) {
str = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server") + "-" + replicaId);
}
return str;
}
/**
* Parse the meta replicaId from the passed znode
* @param znode
* @return replicaId
*/
public int getMetaReplicaIdFromZnode(String znode) {
String pattern = conf.get("zookeeper.znode.metaserver","meta-region-server");
if (znode.equals(pattern)) return HRegionInfo.DEFAULT_REPLICA_ID;
// the non-default replicas are of the pattern meta-region-server-<replicaId>
String nonDefaultPattern = pattern + "-";
return Integer.parseInt(znode.substring(nonDefaultPattern.length()));
}
/**
* Register the specified listener to receive ZooKeeper events.
* @param listener

6
hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java
View File

@ -894,6 +894,12 @@ public final class HConstants {
public static final String LOG_REPLAY_WAIT_REGION_TIMEOUT =
"hbase.master.log.replay.wait.region.timeout";
/** Conf key for enabling meta replication */
public static final String USE_META_REPLICAS = "hbase.meta.replicas.use";
public static final boolean DEFAULT_USE_META_REPLICAS = false;
public static final String META_REPLICAS_NUM = "hbase.meta.replica.count";
public static final int DEFAULT_META_REPLICA_NUM = 1;
/**
* The name of the configuration parameter that specifies
* the number of bytes in a newly created checksum chunk.

108
hbase-it/src/test/java/org/apache/hadoop/hbase/IntegrationTestMetaReplicas.java Normal file
View File

@ -0,0 +1,108 @@
/**
* 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;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.client.TestMetaWithReplicas;
import org.apache.hadoop.hbase.regionserver.StorefileRefresherChore;
import org.apache.hadoop.hbase.testclassification.IntegrationTests;
import org.apache.hadoop.hbase.zookeeper.ZKUtil;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import org.apache.hadoop.util.ToolRunner;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
/**
* An integration test that starts the cluster with three replicas for the meta
* It then creates a table, flushes the meta, kills the server holding the primary.
* After that a client issues put/get requests on the created table - the other
* replicas of the meta would be used to get the location of the region of the created
* table.
*/
@Category(IntegrationTests.class)
public class IntegrationTestMetaReplicas {
static final Log LOG = LogFactory.getLog(IntegrationTestMetaReplicas.class);
/**
* Util to get at the cluster.
*/
private static IntegrationTestingUtility util;
@BeforeClass
public static void setUp() throws Exception {
// Set up the integration test util
if (util == null) {
util = new IntegrationTestingUtility();
}
util.getConfiguration().setInt(HConstants.META_REPLICAS_NUM, 3);
util.getConfiguration().setInt(
StorefileRefresherChore.REGIONSERVER_STOREFILE_REFRESH_PERIOD, 1000);
// Make sure there are three servers.
util.initializeCluster(3);
ZooKeeperWatcher zkw = util.getZooKeeperWatcher();
Configuration conf = util.getConfiguration();
String baseZNode = conf.get(HConstants.ZOOKEEPER_ZNODE_PARENT,
HConstants.DEFAULT_ZOOKEEPER_ZNODE_PARENT);
String primaryMetaZnode = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server"));
// check that the data in the znode is parseable (this would also mean the znode exists)
byte[] data = ZKUtil.getData(zkw, primaryMetaZnode);
ServerName.parseFrom(data);
waitUntilZnodeAvailable(1);
waitUntilZnodeAvailable(2);
}
@AfterClass
public static void teardown() throws Exception {
//Clean everything up.
util.restoreCluster();
util = null;
}
private static void waitUntilZnodeAvailable(int replicaId) throws Exception {
String znode = util.getZooKeeperWatcher().getZNodeForReplica(replicaId);
int i = 0;
while (i < 1000) {
if (ZKUtil.checkExists(util.getZooKeeperWatcher(), znode) == -1) {
Thread.sleep(100);
i++;
} else break;
}
if (i == 1000) throw new IOException("znode for meta replica " + replicaId + " not available");
}
@Test
public void testShutdownHandling() throws Exception {
// This test creates a table, flushes the meta (with 3 replicas), kills the
// server holding the primary meta replica. Then it does a put/get into/from
// the test table. The put/get operations would use the replicas to locate the
// location of the test table's region
TestMetaWithReplicas.shutdownMetaAndDoValidations(util);
}
public static void main(String[] args) throws Exception {
setUp();
new IntegrationTestMetaReplicas().testShutdownHandling();
teardown();
}
}

18
hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
View File

@ -1381,14 +1381,15 @@ public class AssignmentManager {
}
/**
* Assigns the hbase:meta region.
* Assigns the hbase:meta region or a replica.
* <p>
* Assumes that hbase:meta is currently closed and is not being actively served by
* any RegionServer.
* @param hri TODO
*/
public void assignMeta() throws KeeperException {
regionStates.updateRegionState(HRegionInfo.FIRST_META_REGIONINFO, State.OFFLINE);
assign(HRegionInfo.FIRST_META_REGIONINFO);
public void assignMeta(HRegionInfo hri) throws KeeperException {
regionStates.updateRegionState(hri, State.OFFLINE);
assign(hri);
}
/**
@ -1968,6 +1969,15 @@ public class AssignmentManager {
return isCarryingRegion(serverName, HRegionInfo.FIRST_META_REGIONINFO);
}
public boolean isCarryingMetaReplica(ServerName serverName, int replicaId) {
return isCarryingRegion(serverName,
RegionReplicaUtil.getRegionInfoForReplica(HRegionInfo.FIRST_META_REGIONINFO, replicaId));
}
public boolean isCarryingMetaReplica(ServerName serverName, HRegionInfo metaHri) {
return isCarryingRegion(serverName, metaHri);
}
/**
* Check if the shutdown server carries the specific region.
* @return whether the serverName currently hosts the region

90
hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
View File

@ -57,12 +57,14 @@ import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.MetaTableAccessor;
import org.apache.hadoop.hbase.NamespaceDescriptor;
import org.apache.hadoop.hbase.NamespaceNotFoundException;
import org.apache.hadoop.hbase.PleaseHoldException;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.Server;
import org.apache.hadoop.hbase.ServerLoad;
import org.apache.hadoop.hbase.ServerName;
@ -75,6 +77,7 @@ import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.client.MetaScanner;
import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitor;
import org.apache.hadoop.hbase.client.MetaScanner.MetaScannerVisitorBase;
import org.apache.hadoop.hbase.client.RegionReplicaUtil;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.TableState;
import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
@ -341,6 +344,9 @@ public class HMaster extends HRegionServer implements MasterServices, Server {
LOG.info("hbase.rootdir=" + FSUtils.getRootDir(this.conf) +
", hbase.cluster.distributed=" + this.conf.getBoolean(HConstants.CLUSTER_DISTRIBUTED, false));
// Disable usage of meta replicas in the master
this.conf.setBoolean(HConstants.USE_META_REPLICAS, false);
Replication.decorateMasterConfiguration(this.conf);
// Hack! Maps DFSClient => Master for logs. HDFS made this
@ -603,7 +609,9 @@ public class HMaster extends HRegionServer implements MasterServices, Server {
// enable table descriptors cache
this.tableDescriptors.setCacheOn();
// set the META's descriptor to the correct replication
this.tableDescriptors.get(TableName.META_TABLE_NAME).setRegionReplication(
conf.getInt(HConstants.META_REPLICAS_NUM, HConstants.DEFAULT_META_REPLICA_NUM));
// warm-up HTDs cache on master initialization
if (preLoadTableDescriptors) {
status.setStatus("Pre-loading table descriptors");
@ -693,7 +701,7 @@ public class HMaster extends HRegionServer implements MasterServices, Server {
// Make sure meta assigned before proceeding.
status.setStatus("Assigning Meta Region");
assignMeta(status, previouslyFailedMetaRSs);
assignMeta(status, previouslyFailedMetaRSs, HRegionInfo.DEFAULT_REPLICA_ID);
// check if master is shutting down because above assignMeta could return even hbase:meta isn't
// assigned when master is shutting down
if(isStopped()) return;
@ -737,6 +745,15 @@ public class HMaster extends HRegionServer implements MasterServices, Server {
LOG.info("Master has completed initialization");
configurationManager.registerObserver(this.balancer);
initialized = true;
// assign the meta replicas
Set<ServerName> EMPTY_SET = new HashSet<ServerName>();
int numReplicas = conf.getInt(HConstants.META_REPLICAS_NUM,
HConstants.DEFAULT_META_REPLICA_NUM);
for (int i = 1; i < numReplicas; i++) {
assignMeta(status, EMPTY_SET, i);
}
unassignExcessMetaReplica(zooKeeper, numReplicas);
status.setStatus("Starting quota manager");
initQuotaManager();
@ -773,47 +790,81 @@ public class HMaster extends HRegionServer implements MasterServices, Server {
return new ServerManager(master, services);
}
private void unassignExcessMetaReplica(ZooKeeperWatcher zkw, int numMetaReplicasConfigured) {
// unassign the unneeded replicas (for e.g., if the previous master was configured
// with a replication of 3 and now it is 2, we need to unassign the 1 unneeded replica)
try {
List<String> metaReplicaZnodes = zooKeeper.getMetaReplicaNodes();
for (String metaReplicaZnode : metaReplicaZnodes) {
int replicaId = zooKeeper.getMetaReplicaIdFromZnode(metaReplicaZnode);
if (replicaId >= numMetaReplicasConfigured) {
RegionState r = MetaTableLocator.getMetaRegionState(zkw, replicaId);
serverManager.sendRegionClose(r.getServerName(), r.getRegion());
ZKUtil.deleteNode(zkw, zkw.getZNodeForReplica(replicaId));
}
}
} catch (Exception ex) {
// ignore the exception since we don't want the master to be wedged due to potential
// issues in the cleanup of the extra regions. We can do that cleanup via hbck or manually
LOG.warn("Ignoring exception " + ex);
}
}
/**
* Check <code>hbase:meta</code> is assigned. If not, assign it.
* @param status MonitoredTask
* @param previouslyFailedMetaRSs
* @param replicaId
* @throws InterruptedException
* @throws IOException
* @throws KeeperException
*/
void assignMeta(MonitoredTask status, Set<ServerName> previouslyFailedMetaRSs)
void assignMeta(MonitoredTask status, Set<ServerName> previouslyFailedMetaRSs, int replicaId)
throws InterruptedException, IOException, KeeperException {
// Work on meta region
int assigned = 0;
long timeout = this.conf.getLong("hbase.catalog.verification.timeout", 1000);
status.setStatus("Assigning hbase:meta region");
if (replicaId == HRegionInfo.DEFAULT_REPLICA_ID) {
status.setStatus("Assigning hbase:meta region");
} else {
status.setStatus("Assigning hbase:meta region, replicaId " + replicaId);
}
// Get current meta state from zk.
RegionState metaState = MetaTableLocator.getMetaRegionState(getZooKeeper());
RegionState metaState = MetaTableLocator.getMetaRegionState(getZooKeeper(), replicaId);
HRegionInfo hri = RegionReplicaUtil.getRegionInfoForReplica(HRegionInfo.FIRST_META_REGIONINFO,
replicaId);
RegionStates regionStates = assignmentManager.getRegionStates();
regionStates.createRegionState(HRegionInfo.FIRST_META_REGIONINFO,
metaState.getState(), metaState.getServerName(), null);
regionStates.createRegionState(hri, metaState.getState(),
metaState.getServerName(), null);
if (!metaState.isOpened() || !metaTableLocator.verifyMetaRegionLocation(
this.getConnection(), this.getZooKeeper(), timeout)) {
this.getConnection(), this.getZooKeeper(), timeout, replicaId)) {
ServerName currentMetaServer = metaState.getServerName();
if (serverManager.isServerOnline(currentMetaServer)) {
LOG.info("Meta was in transition on " + currentMetaServer);
if (replicaId == HRegionInfo.DEFAULT_REPLICA_ID) {
LOG.info("Meta was in transition on " + currentMetaServer);
} else {
LOG.info("Meta with replicaId " + replicaId + " was in transition on " +
currentMetaServer);
}
assignmentManager.processRegionsInTransition(Arrays.asList(metaState));
} else {
if (currentMetaServer != null) {
splitMetaLogBeforeAssignment(currentMetaServer);
regionStates.logSplit(HRegionInfo.FIRST_META_REGIONINFO);
previouslyFailedMetaRSs.add(currentMetaServer);
if (replicaId == HRegionInfo.DEFAULT_REPLICA_ID) {
splitMetaLogBeforeAssignment(currentMetaServer);
regionStates.logSplit(HRegionInfo.FIRST_META_REGIONINFO);
previouslyFailedMetaRSs.add(currentMetaServer);
}
}
LOG.info("Re-assigning hbase:meta, it was on " + currentMetaServer);
assignmentManager.assignMeta();
LOG.info("Re-assigning hbase:meta with replicaId, " + replicaId +
" it was on " + currentMetaServer);
assignmentManager.assignMeta(hri);
}
assigned++;
}
enableMeta(TableName.META_TABLE_NAME);
if (replicaId == HRegionInfo.DEFAULT_REPLICA_ID) enableMeta(TableName.META_TABLE_NAME);
if ((RecoveryMode.LOG_REPLAY == this.getMasterFileSystem().getLogRecoveryMode())
&& (!previouslyFailedMetaRSs.isEmpty())) {
@ -826,10 +877,9 @@ public class HMaster extends HRegionServer implements MasterServices, Server {
// if the meta region server is died at this time, we need it to be re-assigned
// by SSH so that system tables can be assigned.
// No need to wait for meta is assigned = 0 when meta is just verified.
enableServerShutdownHandler(assigned != 0);
LOG.info("hbase:meta assigned=" + assigned + ", location="
+ metaTableLocator.getMetaRegionLocation(this.getZooKeeper()));
if (replicaId == HRegionInfo.DEFAULT_REPLICA_ID) enableServerShutdownHandler(assigned != 0);
LOG.info("hbase:meta with replicaId " + replicaId + " assigned=" + assigned + ", location="
+ metaTableLocator.getMetaRegionLocation(this.getZooKeeper(), replicaId));
status.setStatus("META assigned.");
}

2
hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionStateStore.java
View File

@ -170,7 +170,7 @@ public class RegionStateStore {
// persist meta state in MetaTableLocator (which in turn is zk storage currently)
try {
MetaTableLocator.setMetaLocation(server.getZooKeeper(),
newState.getServerName(), newState.getState());
newState.getServerName(), hri.getReplicaId(), newState.getState());
return; // Done
} catch (KeeperException e) {
throw new IOException("Failed to update meta ZNode", e);

5
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.java
View File

@ -857,10 +857,11 @@ public abstract class BaseLoadBalancer implements LoadBalancer {
/**
* Check if a region belongs to some small system table.
* If so, it may be expected to be put on the master regionserver.
* If so, the primary replica may be expected to be put on the master regionserver.
*/
public boolean shouldBeOnMaster(HRegionInfo region) {
return tablesOnMaster.contains(region.getTable().getNameAsString());
return tablesOnMaster.contains(region.getTable().getNameAsString())
&& region.getReplicaId() == HRegionInfo.DEFAULT_REPLICA_ID;
}
/**

2
hbase-server/src/main/java/org/apache/hadoop/hbase/master/handler/MetaServerShutdownHandler.java
View File

@ -150,7 +150,7 @@ public class MetaServerShutdownHandler extends ServerShutdownHandler {
getLong("hbase.catalog.verification.timeout", 1000);
if (!server.getMetaTableLocator().verifyMetaRegionLocation(server.getConnection(),
this.server.getZooKeeper(), timeout)) {
this.services.getAssignmentManager().assignMeta();
this.services.getAssignmentManager().assignMeta(HRegionInfo.FIRST_META_REGIONINFO);
} else if (serverName.equals(server.getMetaTableLocator().getMetaRegionLocation(
this.server.getZooKeeper()))) {
throw new IOException("hbase:meta is onlined on the dead server "

16
hbase-server/src/main/java/org/apache/hadoop/hbase/master/handler/ServerShutdownHandler.java
View File

@ -32,6 +32,7 @@ import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.Server;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.client.RegionReplicaUtil;
import org.apache.hadoop.hbase.client.TableState;
import org.apache.hadoop.hbase.executor.EventHandler;
import org.apache.hadoop.hbase.executor.EventType;
@ -198,7 +199,17 @@ public class ServerShutdownHandler extends EventHandler {
} catch (IOException ioe) {
resubmit(serverName, ioe);
}
List<HRegionInfo> toAssignRegions = new ArrayList<HRegionInfo>();
int replicaCount = services.getConfiguration().getInt(HConstants.META_REPLICAS_NUM,
HConstants.DEFAULT_META_REPLICA_NUM);
for (int i = 1; i < replicaCount; i++) {
HRegionInfo metaHri =
RegionReplicaUtil.getRegionInfoForReplica(HRegionInfo.FIRST_META_REGIONINFO, i);
if (am.isCarryingMetaReplica(serverName, metaHri)) {
LOG.info("Reassigning meta replica" + metaHri + " that was on " + serverName);
toAssignRegions.add(metaHri);
}
}
// Clean out anything in regions in transition. Being conservative and
// doing after log splitting. Could do some states before -- OPENING?
// OFFLINE? -- and then others after like CLOSING that depend on log
@ -208,8 +219,7 @@ public class ServerShutdownHandler extends EventHandler {
" region(s) that " + (serverName == null? "null": serverName) +
" was carrying (and " + regionsInTransition.size() +
" regions(s) that were opening on this server)");
List<HRegionInfo> toAssignRegions = new ArrayList<HRegionInfo>();
toAssignRegions.addAll(regionsInTransition);
// Iterate regions that were on this server and assign them

12
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
View File

@ -1167,6 +1167,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver { //
"hbase.regionserver.optionalcacheflushinterval";
/** Default interval for the memstore flush */
public static final int DEFAULT_CACHE_FLUSH_INTERVAL = 3600000;
public static final int META_CACHE_FLUSH_INTERVAL = 300000; // 5 minutes
/** Conf key to force a flush if there are already enough changes for one region in memstore */
public static final String MEMSTORE_FLUSH_PER_CHANGES =
@ -1799,18 +1800,23 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver { //
&& (this.maxFlushedSeqId + this.flushPerChanges < this.sequenceId.get())) {
return true;
}
if (flushCheckInterval <= 0) { //disabled
long modifiedFlushCheckInterval = flushCheckInterval;
if (getRegionInfo().isMetaRegion() &&
getRegionInfo().getReplicaId() == HRegionInfo.DEFAULT_REPLICA_ID) {
modifiedFlushCheckInterval = META_CACHE_FLUSH_INTERVAL;
}
if (modifiedFlushCheckInterval <= 0) { //disabled
return false;
}
long now = EnvironmentEdgeManager.currentTime();
//if we flushed in the recent past, we don't need to do again now
if ((now - getEarliestFlushTimeForAllStores() < flushCheckInterval)) {
if ((now - getEarliestFlushTimeForAllStores() < modifiedFlushCheckInterval)) {
return false;
}
//since we didn't flush in the recent past, flush now if certain conditions
//are met. Return true on first such memstore hit.
for (Store s : this.getStores().values()) {
if (s.timeOfOldestEdit() < now - flushCheckInterval) {
if (s.timeOfOldestEdit() < now - modifiedFlushCheckInterval) {
// we have an old enough edit in the memstore, flush
return true;
}

18
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
View File

@ -470,6 +470,8 @@ public class HRegionServer extends HasThread implements
checkCodecs(this.conf);
this.userProvider = UserProvider.instantiate(conf);
FSUtils.setupShortCircuitRead(this.conf);
// Disable usage of meta replicas in the regionserver
this.conf.setBoolean(HConstants.USE_META_REPLICAS, false);
// Config'ed params
this.numRetries = this.conf.getInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER,
@ -788,11 +790,19 @@ public class HRegionServer extends HasThread implements
rpcClient = RpcClientFactory.createClient(conf, clusterId, new InetSocketAddress(
rpcServices.isa.getAddress(), 0));
boolean onlyMetaRefresh = false;
int storefileRefreshPeriod = conf.getInt(
StorefileRefresherChore.REGIONSERVER_STOREFILE_REFRESH_PERIOD
, StorefileRefresherChore.DEFAULT_REGIONSERVER_STOREFILE_REFRESH_PERIOD);
if (storefileRefreshPeriod == 0) {
storefileRefreshPeriod = conf.getInt(
StorefileRefresherChore.REGIONSERVER_META_STOREFILE_REFRESH_PERIOD,
StorefileRefresherChore.DEFAULT_REGIONSERVER_STOREFILE_REFRESH_PERIOD);
onlyMetaRefresh = true;
}
if (storefileRefreshPeriod > 0) {
this.storefileRefresher = new StorefileRefresherChore(storefileRefreshPeriod, this, this);
this.storefileRefresher = new StorefileRefresherChore(storefileRefreshPeriod,
onlyMetaRefresh, this, this);
}
registerConfigurationObservers();
}
@ -1739,7 +1749,8 @@ public class HRegionServer extends HasThread implements
WAL wal;
LogRoller roller = walRoller;
//_ROOT_ and hbase:meta regions have separate WAL.
if (regionInfo != null && regionInfo.isMetaTable()) {
if (regionInfo != null && regionInfo.isMetaTable() &&
regionInfo.getReplicaId() == HRegionInfo.DEFAULT_REPLICA_ID) {
roller = ensureMetaWALRoller();
wal = walFactory.getMetaWAL(regionInfo.getEncodedNameAsBytes());
} else if (regionInfo == null) {
@ -1837,7 +1848,8 @@ public class HRegionServer extends HasThread implements
Preconditions.checkArgument(hris != null && hris.length == 1);
if (hris[0].isMetaRegion()) {
try {
MetaTableLocator.setMetaLocation(getZooKeeper(), serverName, State.OPEN);
MetaTableLocator.setMetaLocation(getZooKeeper(), serverName,
hris[0].getReplicaId(),State.OPEN);
} catch (KeeperException e) {
LOG.info("Failed to update meta location", e);
return false;

14
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StorefileRefresherChore.java
View File

@ -53,19 +53,28 @@ public class StorefileRefresherChore extends Chore {
= "hbase.regionserver.storefile.refresh.period";
static final int DEFAULT_REGIONSERVER_STOREFILE_REFRESH_PERIOD = 0; //disabled by default
/**
* Whether all storefiles should be refreshed, as opposed to just hbase:meta's
* Meta region doesn't have WAL replication for replicas enabled yet
*/
public static final String REGIONSERVER_META_STOREFILE_REFRESH_PERIOD
= "hbase.regionserver.meta.storefile.refresh.period";
private HRegionServer regionServer;
private long hfileTtl;
private int period;
private boolean onlyMetaRefresh = true;
//ts of last time regions store files are refreshed
private Map<String, Long> lastRefreshTimes; // encodedName -> long
public StorefileRefresherChore(int period, HRegionServer regionServer, Stoppable stoppable) {
public StorefileRefresherChore(int period, boolean onlyMetaRefresh, HRegionServer regionServer,
Stoppable stoppable) {
super("StorefileRefresherChore", period, stoppable);
this.period = period;
this.regionServer = regionServer;
this.hfileTtl = this.regionServer.getConfiguration().getLong(
TimeToLiveHFileCleaner.TTL_CONF_KEY, TimeToLiveHFileCleaner.DEFAULT_TTL);
this.onlyMetaRefresh = onlyMetaRefresh;
if (period > hfileTtl / 2) {
throw new RuntimeException(REGIONSERVER_STOREFILE_REFRESH_PERIOD +
" should be set smaller than half of " + TimeToLiveHFileCleaner.TTL_CONF_KEY);
@ -80,6 +89,9 @@ public class StorefileRefresherChore extends Chore {
// skip checking for this region if it can accept writes
continue;
}
// don't refresh unless enabled for all files, or it the meta region
// meta region don't have WAL replication for replicas enabled yet
if (onlyMetaRefresh && !r.getRegionInfo().isMetaTable()) continue;
String encodedName = r.getRegionInfo().getEncodedName();
long time = EnvironmentEdgeManager.currentTime();
if (!lastRefreshTimes.containsKey(encodedName)) {

152
hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java
View File

@ -126,6 +126,7 @@ import org.apache.hadoop.hbase.wal.WAL;
import org.apache.hadoop.hbase.wal.WALFactory;
import org.apache.hadoop.hbase.wal.WALSplitter;
import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;
import org.apache.hadoop.hbase.zookeeper.ZKUtil;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException;
import org.apache.hadoop.io.IOUtils;
@ -306,6 +307,8 @@ public class HBaseFsck extends Configured implements Closeable {
setConf(HBaseConfiguration.create(getConf()));
// disable blockcache for tool invocation, see HBASE-10500
getConf().setFloat(HConstants.HFILE_BLOCK_CACHE_SIZE_KEY, 0);
// Disable usage of meta replicas in hbck
getConf().setBoolean(HConstants.USE_META_REPLICAS, false);
errors = getErrorReporter(conf);
int numThreads = conf.getInt("hbasefsck.numthreads", MAX_NUM_THREADS);
@ -1608,28 +1611,29 @@ public class HBaseFsck extends Configured implements Closeable {
* Record the location of the hbase:meta region as found in ZooKeeper.
*/
private boolean recordMetaRegion() throws IOException {
HRegionLocation metaLocation = connection.locateRegion(
TableName.META_TABLE_NAME, HConstants.EMPTY_START_ROW);
// Check if Meta region is valid and existing
if (metaLocation == null || metaLocation.getRegionInfo() == null ||
metaLocation.getHostname() == null) {
RegionLocations rl = ((ClusterConnection)connection).locateRegion(TableName.META_TABLE_NAME,
HConstants.EMPTY_START_ROW, false, false);
if (rl == null) {
errors.reportError(ERROR_CODE.NULL_META_REGION,
"META region or some of its attributes are null.");
"META region or some of its attributes are null.");
return false;
}
ServerName sn;
try {
sn = getMetaRegionServerName();
} catch (KeeperException e) {
throw new IOException(e);
}
MetaEntry m = new MetaEntry(metaLocation.getRegionInfo(), sn, System.currentTimeMillis());
HbckInfo hbckInfo = regionInfoMap.get(metaLocation.getRegionInfo().getEncodedName());
if (hbckInfo == null) {
regionInfoMap.put(metaLocation.getRegionInfo().getEncodedName(), new HbckInfo(m));
} else {
hbckInfo.metaEntry = m;
for (HRegionLocation metaLocation : rl.getRegionLocations()) {
// Check if Meta region is valid and existing
if (metaLocation == null || metaLocation.getRegionInfo() == null ||
metaLocation.getHostname() == null) {
errors.reportError(ERROR_CODE.NULL_META_REGION,
"META region or some of its attributes are null.");
return false;
}
ServerName sn = metaLocation.getServerName();
MetaEntry m = new MetaEntry(metaLocation.getRegionInfo(), sn, System.currentTimeMillis());
HbckInfo hbckInfo = regionInfoMap.get(metaLocation.getRegionInfo().getEncodedName());
if (hbckInfo == null) {
regionInfoMap.put(metaLocation.getRegionInfo().getEncodedName(), new HbckInfo(m));
} else {
hbckInfo.metaEntry = m;
}
}
return true;
}
@ -1650,12 +1654,12 @@ public class HBaseFsck extends Configured implements Closeable {
});
}
private ServerName getMetaRegionServerName()
private ServerName getMetaRegionServerName(int replicaId)
throws IOException, KeeperException {
ZooKeeperWatcher zkw = createZooKeeperWatcher();
ServerName sn = null;
try {
sn = new MetaTableLocator().getMetaRegionLocation(zkw);
sn = new MetaTableLocator().getMetaRegionLocation(zkw, replicaId);
} finally {
zkw.close();
}
@ -3027,55 +3031,83 @@ public class HBaseFsck extends Configured implements Closeable {
* If there are inconsistencies (i.e. zero or more than one regions
* pretend to be holding the hbase:meta) try to fix that and report an error.
* @throws IOException from HBaseFsckRepair functions
* @throws KeeperException
* @throws InterruptedException
* @throws KeeperException
* @throws InterruptedException
*/
boolean checkMetaRegion() throws IOException, KeeperException, InterruptedException {
List<HbckInfo> metaRegions = Lists.newArrayList();
Map<Integer, HbckInfo> metaRegions = new HashMap<Integer, HbckInfo>();
for (HbckInfo value : regionInfoMap.values()) {
if (value.metaEntry != null && value.metaEntry.isMetaRegion()) {
metaRegions.add(value);
metaRegions.put(value.getReplicaId(), value);
}
}
// There will be always one entry in regionInfoMap corresponding to hbase:meta
// Check the deployed servers. It should be exactly one server.
List<ServerName> servers = new ArrayList<ServerName>();
HbckInfo metaHbckInfo = null;
if (!metaRegions.isEmpty()) {
metaHbckInfo = metaRegions.get(0);
servers = metaHbckInfo.deployedOn;
}
if (servers.size() != 1) {
if (servers.size() == 0) {
errors.reportError(ERROR_CODE.NO_META_REGION, "hbase:meta is not found on any region.");
if (shouldFixAssignments()) {
errors.print("Trying to fix a problem with hbase:meta..");
setShouldRerun();
// try to fix it (treat it as unassigned region)
HBaseFsckRepair.fixUnassigned(admin, HRegionInfo.FIRST_META_REGIONINFO);
HBaseFsckRepair.waitUntilAssigned(admin, HRegionInfo.FIRST_META_REGIONINFO);
}
} else if (servers.size() > 1) {
errors
.reportError(ERROR_CODE.MULTI_META_REGION, "hbase:meta is found on more than one region.");
if (shouldFixAssignments()) {
if (metaHbckInfo == null) {
errors.print(
"Unable to fix problem with hbase:meta due to hbase:meta region info missing");
return false;
int metaReplication = admin.getTableDescriptor(TableName.META_TABLE_NAME)
.getRegionReplication();
boolean noProblem = true;
// There will be always entries in regionInfoMap corresponding to hbase:meta & its replicas
// Check the deployed servers. It should be exactly one server for each replica.
for (int i = 0; i < metaReplication; i++) {
HbckInfo metaHbckInfo = metaRegions.remove(i);
List<ServerName> servers = new ArrayList<ServerName>();
if (metaHbckInfo != null) {
servers = metaHbckInfo.deployedOn;
}
if (servers.size() != 1) {
noProblem = false;
if (servers.size() == 0) {
assignMetaReplica(i);
} else if (servers.size() > 1) {
errors
.reportError(ERROR_CODE.MULTI_META_REGION, "hbase:meta, replicaId " +
metaHbckInfo.getReplicaId() + " is found on more than one region.");
if (shouldFixAssignments()) {
errors.print("Trying to fix a problem with hbase:meta, replicaId " +
metaHbckInfo.getReplicaId() +"..");
setShouldRerun();
// try fix it (treat is a dupe assignment)
HBaseFsckRepair.fixMultiAssignment(connection, metaHbckInfo.metaEntry, servers);
}
errors.print("Trying to fix a problem with hbase:meta..");
setShouldRerun();
// try fix it (treat is a dupe assignment)
HBaseFsckRepair.fixMultiAssignment(connection, metaHbckInfo.metaEntry, servers);
}
}
// rerun hbck with hopefully fixed META
return false;
}
// no errors, so continue normally
return true;
// unassign whatever is remaining in metaRegions. They are excess replicas.
for (Map.Entry<Integer, HbckInfo> entry : metaRegions.entrySet()) {
noProblem = false;
errors.reportError(ERROR_CODE.SHOULD_NOT_BE_DEPLOYED,
"hbase:meta replicas are deployed in excess. Configured " + metaReplication +
", deployed " + metaRegions.size());
if (shouldFixAssignments()) {
errors.print("Trying to undeploy excess replica, replicaId: " + entry.getKey() +
" of hbase:meta..");
setShouldRerun();
unassignMetaReplica(entry.getValue());
}
}
// if noProblem is false, rerun hbck with hopefully fixed META
// if noProblem is true, no errors, so continue normally
return noProblem;
}
private void unassignMetaReplica(HbckInfo hi) throws IOException, InterruptedException,
KeeperException {
undeployRegions(hi);
ZooKeeperWatcher zkw = createZooKeeperWatcher();
ZKUtil.deleteNode(zkw, zkw.getZNodeForReplica(hi.metaEntry.getReplicaId()));
}
private void assignMetaReplica(int replicaId)
throws IOException, KeeperException, InterruptedException {
errors.reportError(ERROR_CODE.NO_META_REGION, "hbase:meta, replicaId " +
replicaId +" is not found on any region.");
if (shouldFixAssignments()) {
errors.print("Trying to fix a problem with hbase:meta..");
setShouldRerun();
// try to fix it (treat it as unassigned region)
HRegionInfo h = RegionReplicaUtil.getRegionInfoForReplica(
HRegionInfo.FIRST_META_REGIONINFO, replicaId);
HBaseFsckRepair.fixUnassigned(admin, h);
HBaseFsckRepair.waitUntilAssigned(admin, h);
}
}
/**

18
hbase-server/src/main/resources/hbase-webapps/master/table.jsp
View File

@ -28,12 +28,14 @@
import="org.apache.hadoop.hbase.ServerName"
import="org.apache.hadoop.hbase.ServerLoad"
import="org.apache.hadoop.hbase.RegionLoad"
import="org.apache.hadoop.hbase.HConstants"
import="org.apache.hadoop.hbase.master.HMaster"
import="org.apache.hadoop.hbase.zookeeper.MetaTableLocator"
import="org.apache.hadoop.hbase.util.Bytes"
import="org.apache.hadoop.hbase.util.FSUtils"
import="org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetRegionInfoResponse.CompactionState"
import="org.apache.hadoop.hbase.TableName"
import="org.apache.hadoop.hbase.client.RegionReplicaUtil"
import="org.apache.hadoop.hbase.HBaseConfiguration" %>
<%
HMaster master = (HMaster)getServletContext().getAttribute(HMaster.MASTER);
@ -53,6 +55,8 @@
ServerName rl = metaTableLocator.getMetaRegionLocation(master.getZooKeeper());
boolean showFragmentation = conf.getBoolean("hbase.master.ui.fragmentation.enabled", false);
boolean readOnly = conf.getBoolean("hbase.master.ui.readonly", false);
int numMetaReplicas = conf.getInt(HConstants.META_REPLICAS_NUM,
HConstants.DEFAULT_META_REPLICA_NUM);
Map<String, Integer> frags = null;
if (showFragmentation) {
frags = FSUtils.getTableFragmentation(master);
@ -202,11 +206,14 @@
%>
<%= tableHeader %>
<%
// NOTE: Presumes one meta region only.
HRegionInfo meta = HRegionInfo.FIRST_META_REGIONINFO;
ServerName metaLocation = metaTableLocator.waitMetaRegionLocation(master.getZooKeeper(), 1);
for (int i = 0; i < 1; i++) {
String url = "//" + metaLocation.getHostname() + ":" + master.getRegionServerInfoPort(metaLocation) + "/";
// NOTE: Presumes meta with one or more replicas
for (int j = 0; j < numMetaReplicas; j++) {
HRegionInfo meta = RegionReplicaUtil.getRegionInfoForReplica(
HRegionInfo.FIRST_META_REGIONINFO, j);
ServerName metaLocation = metaTableLocator.waitMetaRegionLocation(master.getZooKeeper(), j, 1);
for (int i = 0; i < 1; i++) {
String url = "//" + metaLocation.getHostname() + ":" +
master.getRegionServerInfoPort(metaLocation) + "/";
%>
<tr>
<td><%= escapeXml(meta.getRegionNameAsString()) %></td>
@ -217,6 +224,7 @@
<td>-</td>
</tr>
<% } %>
<%} %>
</table>
<%} else {
Admin admin = master.getConnection().getAdmin();

393
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaWithReplicas.java Normal file
View File

@ -0,0 +1,393 @@
/**
*
* 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.apache.hadoop.hbase.util.hbck.HbckTestingUtil.assertErrors;
import static org.apache.hadoop.hbase.util.hbck.HbckTestingUtil.doFsck;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Abortable;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.MetaTableAccessor;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.TableNotFoundException;
import org.apache.hadoop.hbase.regionserver.StorefileRefresherChore;
import org.apache.hadoop.hbase.testclassification.MediumTests;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.HBaseFsck;
import org.apache.hadoop.hbase.util.HBaseFsckRepair;
import org.apache.hadoop.hbase.util.HBaseFsck.ErrorReporter.ERROR_CODE;
import org.apache.hadoop.hbase.util.hbck.HbckTestingUtil;
import org.apache.hadoop.hbase.zookeeper.LoadBalancerTracker;
import org.apache.hadoop.hbase.zookeeper.ZKUtil;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
/**
* Tests the scenarios where replicas are enabled for the meta table
*/
@Category(MediumTests.class)
public class TestMetaWithReplicas {
static final Log LOG = LogFactory.getLog(TestMetaWithReplicas.class);
private final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
@Before
public void setup() throws Exception {
TEST_UTIL.getConfiguration().setInt("zookeeper.session.timeout", 30000);
TEST_UTIL.getConfiguration().setInt(HConstants.META_REPLICAS_NUM, 3);
TEST_UTIL.getConfiguration().setInt(
StorefileRefresherChore.REGIONSERVER_STOREFILE_REFRESH_PERIOD, 1000);
TEST_UTIL.startMiniCluster(3);
// disable the balancer
LoadBalancerTracker l = new LoadBalancerTracker(TEST_UTIL.getZooKeeperWatcher(),
new Abortable() {
boolean aborted = false;
@Override
public boolean isAborted() {
return aborted;
}
@Override
public void abort(String why, Throwable e) {
aborted = true;
}
});
l.setBalancerOn(false);
for (int replicaId = 1; replicaId < 3; replicaId ++) {
HRegionInfo h = RegionReplicaUtil.getRegionInfoForReplica(HRegionInfo.FIRST_META_REGIONINFO,
replicaId);
TEST_UTIL.getMiniHBaseCluster().getMaster().getAssignmentManager().waitForAssignment(h);
}
LOG.debug("All meta replicas assigned");
}
@After
public void tearDown() throws Exception {
TEST_UTIL.shutdownMiniCluster();
}
@Test
public void testMetaHTDReplicaCount() throws Exception {
assertTrue(TEST_UTIL.getHBaseAdmin().getTableDescriptor(TableName.META_TABLE_NAME)
.getRegionReplication() == 3);
}
@Test
public void testZookeeperNodesForReplicas() throws Exception {
// Checks all the znodes exist when meta's replicas are enabled
ZooKeeperWatcher zkw = TEST_UTIL.getZooKeeperWatcher();
Configuration conf = TEST_UTIL.getConfiguration();
String baseZNode = conf.get(HConstants.ZOOKEEPER_ZNODE_PARENT,
HConstants.DEFAULT_ZOOKEEPER_ZNODE_PARENT);
String primaryMetaZnode = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server"));
// check that the data in the znode is parseable (this would also mean the znode exists)
byte[] data = ZKUtil.getData(zkw, primaryMetaZnode);
ServerName.parseFrom(data);
for (int i = 1; i < 3; i++) {
String secZnode = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server") + "-" + i);
String str = zkw.getZNodeForReplica(i);
assertTrue(str.equals(secZnode));
// check that the data in the znode is parseable (this would also mean the znode exists)
data = ZKUtil.getData(zkw, secZnode);
ServerName.parseFrom(data);
}
}
@Test
public void testShutdownHandling() throws Exception {
// This test creates a table, flushes the meta (with 3 replicas), kills the
// server holding the primary meta replica. Then it does a put/get into/from
// the test table. The put/get operations would use the replicas to locate the
// location of the test table's region
shutdownMetaAndDoValidations(TEST_UTIL);
}
public static void shutdownMetaAndDoValidations(HBaseTestingUtility util) throws Exception {
// This test creates a table, flushes the meta (with 3 replicas), kills the
// server holding the primary meta replica. Then it does a put/get into/from
// the test table. The put/get operations would use the replicas to locate the
// location of the test table's region
ZooKeeperWatcher zkw = util.getZooKeeperWatcher();
Configuration conf = util.getConfiguration();
conf.setBoolean(HConstants.USE_META_REPLICAS, true);
String baseZNode = conf.get(HConstants.ZOOKEEPER_ZNODE_PARENT,
HConstants.DEFAULT_ZOOKEEPER_ZNODE_PARENT);
String primaryMetaZnode = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server"));
byte[] data = ZKUtil.getData(zkw, primaryMetaZnode);
ServerName primary = ServerName.parseFrom(data);
byte[] TABLE = Bytes.toBytes("testShutdownHandling");
byte[][] FAMILIES = new byte[][] { Bytes.toBytes("foo") };
if (util.getHBaseAdmin().tableExists(TABLE)) {
util.getHBaseAdmin().disableTable(TABLE);
util.getHBaseAdmin().deleteTable(TABLE);
}
Table htable = util.createTable(TABLE, FAMILIES, conf);
util.getHBaseAdmin().flush(TableName.META_TABLE_NAME);
Thread.sleep(conf.getInt(StorefileRefresherChore.REGIONSERVER_STOREFILE_REFRESH_PERIOD,
30000) * 6);
Connection c = ConnectionFactory.createConnection(util.getConfiguration());
List<HRegionInfo> regions = MetaTableAccessor.getTableRegions(c, TableName.valueOf(TABLE));
HRegionLocation hrl = MetaTableAccessor.getRegionLocation(c, regions.get(0));
// Ensure that the primary server for test table is not the same one as the primary
// of the meta region since we will be killing the srv holding the meta's primary...
// We want to be able to write to the test table even when the meta is not present ..
// If the servers are the same, then move the test table's region out of the server
// to another random server
if (hrl.getServerName().equals(primary)) {
util.getHBaseAdmin().move(hrl.getRegionInfo().getEncodedNameAsBytes(), null);
// wait for the move to complete
do {
Thread.sleep(10);
hrl = MetaTableAccessor.getRegionLocation(c, regions.get(0));
} while (primary.equals(hrl.getServerName()));
util.getHBaseAdmin().flush(TableName.META_TABLE_NAME);
Thread.sleep(conf.getInt(StorefileRefresherChore.REGIONSERVER_STOREFILE_REFRESH_PERIOD,
30000) * 3);
}
ServerName master = util.getHBaseClusterInterface().getClusterStatus().getMaster();
// kill the master so that regionserver recovery is not triggered at all
// for the meta server
util.getHBaseClusterInterface().stopMaster(master);
util.getHBaseClusterInterface().waitForMasterToStop(master, 60000);
if (!master.equals(primary)) {
util.getHBaseClusterInterface().killRegionServer(primary);
util.getHBaseClusterInterface().waitForRegionServerToStop(primary, 60000);
}
((ClusterConnection)c).clearRegionCache();
htable.close();
htable = c.getTable(TableName.valueOf(TABLE));
byte[] row = "test".getBytes();
Put put = new Put(row);
put.add("foo".getBytes(), row, row);
BufferedMutator m = c.getBufferedMutator(TableName.valueOf(TABLE));
m.mutate(put);
m.flush();
// Try to do a get of the row that was just put
Get get = new Get(row);
Result r = htable.get(get);
assertTrue(Arrays.equals(r.getRow(), row));
// now start back the killed servers and disable use of replicas. That would mean
// calls go to the primary
util.getHBaseClusterInterface().startMaster(master.getHostname(), 0);
util.getHBaseClusterInterface().startRegionServer(primary.getHostname(), 0);
util.getHBaseClusterInterface().waitForActiveAndReadyMaster();
((ClusterConnection)c).clearRegionCache();
htable.close();
conf.setBoolean(HConstants.USE_META_REPLICAS, false);
htable = c.getTable(TableName.valueOf(TABLE));
r = htable.get(get);
assertTrue(Arrays.equals(r.getRow(), row));
}
@Test
public void testChangingReplicaCount() throws Exception {
// tests changing the replica count across master restarts
// reduce the replica count from 3 to 2
stopMasterAndValidateReplicaCount(3, 2);
// increase the replica count from 2 to 3
stopMasterAndValidateReplicaCount(2, 3);
}
private void stopMasterAndValidateReplicaCount(int originalReplicaCount, int newReplicaCount)
throws Exception {
ServerName sn = TEST_UTIL.getHBaseClusterInterface().getClusterStatus().getMaster();
TEST_UTIL.getHBaseClusterInterface().stopMaster(sn);
TEST_UTIL.getHBaseClusterInterface().waitForMasterToStop(sn, 60000);
List<String> metaZnodes = TEST_UTIL.getZooKeeperWatcher().getMetaReplicaNodes();
assert(metaZnodes.size() == originalReplicaCount); //we should have what was configured before
TEST_UTIL.getHBaseClusterInterface().getConf().setInt(HConstants.META_REPLICAS_NUM,
newReplicaCount);
TEST_UTIL.getHBaseClusterInterface().startMaster(sn.getHostname(), 0);
TEST_UTIL.getHBaseClusterInterface().waitForActiveAndReadyMaster();
int count = 0;
do {
metaZnodes = TEST_UTIL.getZooKeeperWatcher().getMetaReplicaNodes();
Thread.sleep(10);
count++;
// wait for the count to be different from the originalReplicaCount. When the
// replica count is reduced, that will happen when the master unassigns excess
// replica, and deletes the excess znodes
} while (metaZnodes.size() == originalReplicaCount && count < 1000);
assert(metaZnodes.size() == newReplicaCount);
// also check if hbck returns without errors
TEST_UTIL.getConfiguration().setInt(HConstants.META_REPLICAS_NUM,
newReplicaCount);
HBaseFsck hbck = HbckTestingUtil.doFsck(TEST_UTIL.getConfiguration(), false);
HbckTestingUtil.assertNoErrors(hbck);
}
@Test
public void testHBaseFsckWithMetaReplicas() throws Exception {
HBaseFsck hbck = HbckTestingUtil.doFsck(TEST_UTIL.getConfiguration(), false);
HbckTestingUtil.assertNoErrors(hbck);
}
@Test
public void testHBaseFsckWithFewerMetaReplicas() throws Exception {
ClusterConnection c = (ClusterConnection)ConnectionFactory.createConnection(
TEST_UTIL.getConfiguration());
RegionLocations rl = c.locateRegion(TableName.META_TABLE_NAME, HConstants.EMPTY_START_ROW,
false, false);
HBaseFsckRepair.closeRegionSilentlyAndWait(c,
rl.getRegionLocation(1).getServerName(), rl.getRegionLocation(1).getRegionInfo());
// check that problem exists
HBaseFsck hbck = doFsck(TEST_UTIL.getConfiguration(), false);
assertErrors(hbck, new ERROR_CODE[]{ERROR_CODE.UNKNOWN,ERROR_CODE.NO_META_REGION});
// fix the problem
hbck = doFsck(TEST_UTIL.getConfiguration(), true);
// run hbck again to make sure we don't see any errors
hbck = doFsck(TEST_UTIL.getConfiguration(), false);
assertErrors(hbck, new ERROR_CODE[]{});
}
@Test
public void testHBaseFsckWithFewerMetaReplicaZnodes() throws Exception {
ClusterConnection c = (ClusterConnection)ConnectionFactory.createConnection(
TEST_UTIL.getConfiguration());
RegionLocations rl = c.locateRegion(TableName.META_TABLE_NAME, HConstants.EMPTY_START_ROW,
false, false);
HBaseFsckRepair.closeRegionSilentlyAndWait(c,
rl.getRegionLocation(2).getServerName(), rl.getRegionLocation(2).getRegionInfo());
ZooKeeperWatcher zkw = TEST_UTIL.getZooKeeperWatcher();
ZKUtil.deleteNode(zkw, zkw.getZNodeForReplica(2));
// check that problem exists
HBaseFsck hbck = doFsck(TEST_UTIL.getConfiguration(), false);
assertErrors(hbck, new ERROR_CODE[]{ERROR_CODE.UNKNOWN,ERROR_CODE.NO_META_REGION});
// fix the problem
hbck = doFsck(TEST_UTIL.getConfiguration(), true);
// run hbck again to make sure we don't see any errors
hbck = doFsck(TEST_UTIL.getConfiguration(), false);
assertErrors(hbck, new ERROR_CODE[]{});
}
@Test
public void testAccessingUnknownTables() throws Exception {
Configuration conf = new Configuration(TEST_UTIL.getConfiguration());
conf.setBoolean(HConstants.USE_META_REPLICAS, true);
Table table = TEST_UTIL.getConnection().getTable(TableName.valueOf("RandomTable"));
Get get = new Get(Bytes.toBytes("foo"));
try {
table.get(get);
} catch (TableNotFoundException t) {
return;
}
fail("Expected TableNotFoundException");
}
@Test
public void testMetaAddressChange() throws Exception {
// checks that even when the meta's location changes, the various
// caches update themselves. Uses the master operations to test
// this
Configuration conf = TEST_UTIL.getConfiguration();
ZooKeeperWatcher zkw = TEST_UTIL.getZooKeeperWatcher();
String baseZNode = conf.get(HConstants.ZOOKEEPER_ZNODE_PARENT,
HConstants.DEFAULT_ZOOKEEPER_ZNODE_PARENT);
String primaryMetaZnode = ZKUtil.joinZNode(baseZNode,
conf.get("zookeeper.znode.metaserver", "meta-region-server"));
// check that the data in the znode is parseable (this would also mean the znode exists)
byte[] data = ZKUtil.getData(zkw, primaryMetaZnode);
ServerName currentServer = ServerName.parseFrom(data);
Collection<ServerName> liveServers = TEST_UTIL.getHBaseAdmin().getClusterStatus().getServers();
ServerName moveToServer = null;
for (ServerName s : liveServers) {
if (!currentServer.equals(s)) {
moveToServer = s;
}
}
assert(moveToServer != null);
String tableName = "randomTable5678";
TEST_UTIL.createTable(TableName.valueOf(tableName), "f");
assertTrue(TEST_UTIL.getHBaseAdmin().tableExists(tableName));
TEST_UTIL.getHBaseAdmin().move(HRegionInfo.FIRST_META_REGIONINFO.getEncodedNameAsBytes(),
Bytes.toBytes(moveToServer.getServerName()));
int i = 0;
do {
Thread.sleep(10);
data = ZKUtil.getData(zkw, primaryMetaZnode);
currentServer = ServerName.parseFrom(data);
i++;
} while (!moveToServer.equals(currentServer) && i < 1000); //wait for 10 seconds overall
assert(i != 1000);
TEST_UTIL.getHBaseAdmin().disableTable("randomTable5678");
assertTrue(TEST_UTIL.getHBaseAdmin().isTableDisabled("randomTable5678"));
}
@Test
public void testShutdownOfReplicaHolder() throws Exception {
// checks that the when the server holding meta replica is shut down, the meta replica
// can be recovered
RegionLocations rl = ConnectionManager.getConnectionInternal(TEST_UTIL.getConfiguration()).
locateRegion(TableName.META_TABLE_NAME, Bytes.toBytes(""), false, true);
HRegionLocation hrl = rl.getRegionLocation(1);
ServerName oldServer = hrl.getServerName();
TEST_UTIL.getHBaseClusterInterface().killRegionServer(oldServer);
int i = 0;
do {
LOG.debug("Waiting for the replica " + hrl.getRegionInfo() + " to come up");
Thread.sleep(30000); //wait for the detection/recovery
rl = ConnectionManager.getConnectionInternal(TEST_UTIL.getConfiguration()).
locateRegion(TableName.META_TABLE_NAME, Bytes.toBytes(""), false, true);
hrl = rl.getRegionLocation(1);
i++;
} while ((hrl == null || hrl.getServerName().equals(oldServer)) && i < 3);
assertTrue(i != 3);
}
@Test
public void testHBaseFsckWithExcessMetaReplicas() throws Exception {
HBaseFsck hbck = new HBaseFsck(TEST_UTIL.getConfiguration());
// Create a meta replica (this will be the 4th one) and assign it
HRegionInfo h = RegionReplicaUtil.getRegionInfoForReplica(
HRegionInfo.FIRST_META_REGIONINFO, 3);
// create in-memory state otherwise master won't assign
TEST_UTIL.getMiniHBaseCluster().getMaster().getAssignmentManager()
.getRegionStates().createRegionState(h);
TEST_UTIL.getMiniHBaseCluster().getMaster().assignRegion(h);
HBaseFsckRepair.waitUntilAssigned(TEST_UTIL.getHBaseAdmin(), h);
// check that problem exists
hbck = doFsck(TEST_UTIL.getConfiguration(), false);
assertErrors(hbck, new ERROR_CODE[]{ERROR_CODE.UNKNOWN, ERROR_CODE.SHOULD_NOT_BE_DEPLOYED});
// fix the problem
hbck = doFsck(TEST_UTIL.getConfiguration(), true);
// run hbck again to make sure we don't see any errors
hbck = doFsck(TEST_UTIL.getConfiguration(), false);
assertErrors(hbck, new ERROR_CODE[]{});
}
}

4
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterNoCluster.java
View File

@ -262,8 +262,8 @@ public class TestMasterNoCluster {
TESTUTIL.getConfiguration());
HMaster master = new HMaster(conf, cp) {
@Override
void assignMeta(MonitoredTask status, Set<ServerName> previouslyFailedMeatRSs) {
}
void assignMeta(MonitoredTask status, Set<ServerName> previouslyFailedMeatRSs, int replicaId)
{ }
@Override
void initializeZKBasedSystemTrackers() throws IOException,

36
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDefaultMemStore.java
View File

@ -33,22 +33,28 @@ import junit.framework.TestCase;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.KeepDeletedCells;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValueTestUtil;
import org.apache.hadoop.hbase.KeyValueUtil;
import org.apache.hadoop.hbase.TableDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.testclassification.MediumTests;
import org.apache.hadoop.hbase.testclassification.RegionServerTests;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.EnvironmentEdge;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.wal.WALFactory;
import org.junit.experimental.categories.Category;
import com.google.common.base.Joiner;
@ -928,6 +934,36 @@ public class TestDefaultMemStore extends TestCase {
}
}
public void testShouldFlushMeta() throws Exception {
// write an edit in the META and ensure the shouldFlush (that the periodic memstore
// flusher invokes) returns true after META_CACHE_FLUSH_INTERVAL (even though
// the MEMSTORE_PERIODIC_FLUSH_INTERVAL is set to a higher value)
Configuration conf = new Configuration();
conf.setInt(HRegion.MEMSTORE_PERIODIC_FLUSH_INTERVAL, HRegion.META_CACHE_FLUSH_INTERVAL * 10);
HBaseTestingUtility hbaseUtility = HBaseTestingUtility.createLocalHTU(conf);
Path testDir = hbaseUtility.getDataTestDir();
EnvironmentEdgeForMemstoreTest edge = new EnvironmentEdgeForMemstoreTest();
EnvironmentEdgeManager.injectEdge(edge);
edge.setCurrentTimeMillis(1234);
WALFactory wFactory = new WALFactory(conf, null, "1234");
HRegion meta = HRegion.createHRegion(HRegionInfo.FIRST_META_REGIONINFO, testDir,
conf, TableDescriptor.metaTableDescriptor(conf),
wFactory.getMetaWAL(HRegionInfo.FIRST_META_REGIONINFO.
getEncodedNameAsBytes()));
HRegionInfo hri = new HRegionInfo(TableName.valueOf("testShouldFlushMeta"),
Bytes.toBytes("row_0200"), Bytes.toBytes("row_0300"));
HTableDescriptor desc = new HTableDescriptor(TableName.valueOf("testShouldFlushMeta"));
desc.addFamily(new HColumnDescriptor("foo".getBytes()));
HRegion r =
HRegion.createHRegion(hri, testDir, conf, desc,
wFactory.getWAL(hri.getEncodedNameAsBytes()));
HRegion.addRegionToMETA(meta, r);
edge.setCurrentTimeMillis(1234 + 100);
assertTrue(meta.shouldFlush() == false);
edge.setCurrentTimeMillis(edge.currentTime() + HRegion.META_CACHE_FLUSH_INTERVAL + 1);
assertTrue(meta.shouldFlush() == true);
}
private class EnvironmentEdgeForMemstoreTest implements EnvironmentEdge {
long t = 1234;
@Override

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

@ -145,7 +145,7 @@ public class TestStoreFileRefresherChore {
boolean isStale = false;
public StaleStorefileRefresherChore(int period, HRegionServer regionServer,
Stoppable stoppable) {
super(period, regionServer, stoppable);
super(period, false, regionServer, stoppable);
}
@Override
protected boolean isRegionStale(String encodedName, long time) {