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HBASE-8597 compaction record (probably) can block WAL cleanup forever if region is closed without edits (Sergey) 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1486212 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Zhihong Yu 2013-05-24 20:36:21 +00:00
parent 83edb0f4ee
commit 6e68b91ef2
5 changed files with 129 additions and 58 deletions
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23
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
View File

@ -832,7 +832,13 @@ class FSHLog implements HLog, Syncable {
public void append(HRegionInfo info, byte [] tableName, WALEdit edits,
final long now, HTableDescriptor htd)
throws IOException {
append(info, tableName, edits, HConstants.DEFAULT_CLUSTER_ID, now, htd);
append(info, tableName, edits, now, htd, true);
}
@Override
public void append(HRegionInfo info, byte [] tableName, WALEdit edits,
final long now, HTableDescriptor htd, boolean isInMemstore) throws IOException {
append(info, tableName, edits, HConstants.DEFAULT_CLUSTER_ID, now, htd, true, isInMemstore);
}
/**
@ -862,9 +868,9 @@ class FSHLog implements HLog, Syncable {
* @throws IOException
*/
private long append(HRegionInfo info, byte [] tableName, WALEdit edits, UUID clusterId,
final long now, HTableDescriptor htd, boolean doSync)
final long now, HTableDescriptor htd, boolean doSync, boolean isInMemstore)
throws IOException {
if (edits.isEmpty()) return this.unflushedEntries.get();;
if (edits.isEmpty()) return this.unflushedEntries.get();
if (this.closed) {
throw new IOException("Cannot append; log is closed");
}
@ -879,7 +885,7 @@ class FSHLog implements HLog, Syncable {
// Use encoded name. Its shorter, guaranteed unique and a subset of
// actual name.
byte [] encodedRegionName = info.getEncodedNameAsBytes();
this.oldestUnflushedSeqNums.putIfAbsent(encodedRegionName, seqNum);
if (isInMemstore) this.oldestUnflushedSeqNums.putIfAbsent(encodedRegionName, seqNum);
HLogKey logKey = makeKey(encodedRegionName, tableName, seqNum, now, clusterId);
doWrite(info, logKey, edits, htd);
this.numEntries.incrementAndGet();
@ -903,14 +909,7 @@ class FSHLog implements HLog, Syncable {
public long appendNoSync(HRegionInfo info, byte [] tableName, WALEdit edits,
UUID clusterId, final long now, HTableDescriptor htd)
throws IOException {
return append(info, tableName, edits, clusterId, now, htd, false);
}
@Override
public long append(HRegionInfo info, byte [] tableName, WALEdit edits,
UUID clusterId, final long now, HTableDescriptor htd)
throws IOException {
return append(info, tableName, edits, clusterId, now, htd, true);
return append(info, tableName, edits, clusterId, now, htd, false, true);
}
/**

35
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java
View File

@ -264,17 +264,25 @@ public interface HLog {
public void closeAndDelete() throws IOException;
/**
* Only used in tests.
*
* Same as {@link #appendNoSync(HRegionInfo, byte[], WALEdit, UUID, long, HTableDescriptor)},
* except it causes a sync on the log
*/
public void append(HRegionInfo info, byte[] tableName, WALEdit edits,
final long now, HTableDescriptor htd) throws IOException;
/**
* Append a set of edits to the log. Log edits are keyed by (encoded)
* regionName, rowname, and log-sequence-id. The HLog is flushed after this
* transaction is written to the log.
* @param info
* @param tableName
* @param edits
* @param now
* @param htd
* @throws IOException
* @param isInMemstore Whether the record is in memstore. False for system records.
*/
public void append(HRegionInfo info, byte[] tableName, WALEdit edits,
final long now, HTableDescriptor htd) throws IOException;
final long now, HTableDescriptor htd, boolean isInMemstore) throws IOException;
/**
* Append a set of edits to the log. Log edits are keyed by (encoded)
@ -287,28 +295,11 @@ public interface HLog {
* @param clusterId
* The originating clusterId for this edit (for replication)
* @param now
* @return txid of this transaction
* @throws IOException
*/
public long appendNoSync(HRegionInfo info, byte[] tableName, WALEdit edits,
UUID clusterId, final long now, HTableDescriptor htd) throws IOException;
/**
* Append a set of edits to the log. Log edits are keyed by (encoded)
* regionName, rowname, and log-sequence-id. The HLog is flushed after this
* transaction is written to the log.
*
* @param info
* @param tableName
* @param edits
* @param clusterId
* The originating clusterId for this edit (for replication)
* @param now
* @param htd
* @return txid of this transaction
* @throws IOException
*/
public long append(HRegionInfo info, byte[] tableName, WALEdit edits,
public long appendNoSync(HRegionInfo info, byte[] tableName, WALEdit edits,
UUID clusterId, final long now, HTableDescriptor htd) throws IOException;
public void hsync() throws IOException;

2
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLogUtil.java
View File

@ -262,7 +262,7 @@ public class HLogUtil {
final CompactionDescriptor c) throws IOException {
WALEdit e = WALEdit.createCompaction(c);
log.append(info, c.getTableName().toByteArray(), e,
EnvironmentEdgeManager.currentTimeMillis(), htd);
EnvironmentEdgeManager.currentTimeMillis(), htd, false);
if (LOG.isTraceEnabled()) {
LOG.trace("Appended compaction marker " + TextFormat.shortDebugString(c));
}

29
hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
View File

@ -735,7 +735,16 @@ public class HBaseTestingUtility extends HBaseCommonTestingUtility {
*/
public MiniHBaseCluster startMiniCluster(final int numMasters,
final int numSlaves, final String[] dataNodeHosts) throws Exception {
return startMiniCluster(numMasters, numSlaves, dataNodeHosts, null, null);
return startMiniCluster(numMasters, numSlaves, numSlaves, dataNodeHosts, null, null);
}
/**
* Same as {@link #startMiniCluster(int, int)}, but with custom number of datanodes.
* @param numDataNodes Number of data nodes.
*/
public MiniHBaseCluster startMiniCluster(final int numMasters,
final int numSlaves, final int numDataNodes) throws Exception {
return startMiniCluster(numMasters, numSlaves, numDataNodes, null, null, null);
}
/**
@ -766,12 +775,24 @@ public class HBaseTestingUtility extends HBaseCommonTestingUtility {
* @return Mini hbase cluster instance created.
*/
public MiniHBaseCluster startMiniCluster(final int numMasters,
final int numSlaves, final String[] dataNodeHosts,
final int numSlaves, final String[] dataNodeHosts, Class<? extends HMaster> masterClass,
Class<? extends MiniHBaseCluster.MiniHBaseClusterRegionServer> regionserverClass)
throws Exception {
return startMiniCluster(
numMasters, numSlaves, numSlaves, dataNodeHosts, masterClass, regionserverClass);
}
/**
* Same as {@link #startMiniCluster(int, int, String[], Class, Class)}, but with custom
* number of datanodes.
* @param numDataNodes Number of data nodes.
*/
public MiniHBaseCluster startMiniCluster(final int numMasters,
final int numSlaves, int numDataNodes, final String[] dataNodeHosts,
Class<? extends HMaster> masterClass,
Class<? extends MiniHBaseCluster.MiniHBaseClusterRegionServer> regionserverClass)
throws Exception {
int numDataNodes = numSlaves;
if ( dataNodeHosts != null && dataNodeHosts.length != 0) {
if (dataNodeHosts != null && dataNodeHosts.length != 0) {
numDataNodes = dataNodeHosts.length;
}

96
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
View File

@ -57,9 +57,11 @@ import org.apache.hadoop.hbase.exceptions.FailedLogCloseException;
import org.apache.hadoop.hbase.fs.HFileSystem;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.HRegionServer;
import org.apache.hadoop.hbase.regionserver.Store;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.hbase.util.JVMClusterUtil;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.hadoop.hdfs.DFSClient;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
@ -67,6 +69,7 @@ import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.namenode.LeaseManager;
import org.apache.log4j.Level;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
@ -170,7 +173,7 @@ public class TestLogRolling {
@Before
public void setUp() throws Exception {
TEST_UTIL.startMiniCluster(2);
TEST_UTIL.startMiniCluster(1, 1, 2);
cluster = TEST_UTIL.getHBaseCluster();
dfsCluster = TEST_UTIL.getDFSCluster();
@ -192,18 +195,12 @@ public class TestLogRolling {
this.server = cluster.getRegionServerThreads().get(0).getRegionServer();
this.log = server.getWAL();
// Create the test table and open it
HTableDescriptor desc = new HTableDescriptor(tableName);
desc.addFamily(new HColumnDescriptor(HConstants.CATALOG_FAMILY));
admin.createTable(desc);
HTable table = new HTable(TEST_UTIL.getConfiguration(), tableName);
HTable table = createTestTable(this.tableName);
server = TEST_UTIL.getRSForFirstRegionInTable(Bytes.toBytes(tableName));
this.log = server.getWAL();
for (int i = 1; i <= 256; i++) { // 256 writes should cause 8 log rolls
Put put = new Put(Bytes.toBytes("row" + String.format("%1$04d", i)));
put.add(HConstants.CATALOG_FAMILY, null, value);
table.put(put);
doPut(table, i);
if (i % 32 == 0) {
// After every 32 writes sleep to let the log roller run
try {
@ -221,7 +218,7 @@ public class TestLogRolling {
* @throws org.apache.hadoop.hbase.exceptions.FailedLogCloseException
*/
@Test
public void testLogRolling() throws FailedLogCloseException, IOException {
public void testLogRolling() throws Exception {
this.tableName = getName();
startAndWriteData();
LOG.info("after writing there are " + ((FSHLog) log).getNumLogFiles() + " log files");
@ -248,9 +245,7 @@ public class TestLogRolling {
}
void writeData(HTable table, int rownum) throws IOException {
Put put = new Put(Bytes.toBytes("row" + String.format("%1$04d", rownum)));
put.add(HConstants.CATALOG_FAMILY, null, value);
table.put(put);
doPut(table, rownum);
// sleep to let the log roller run (if it needs to)
try {
@ -324,11 +319,6 @@ public class TestLogRolling {
/**
* Tests that logs are rolled upon detecting datanode death
* Requires an HDFS jar with HDFS-826 & syncFs() support (HDFS-200)
* @throws IOException
* @throws InterruptedException
* @throws InvocationTargetException
* @throws IllegalAccessException
* @throws IllegalArgumentException
*/
@Test
public void testLogRollOnDatanodeDeath() throws Exception {
@ -587,5 +577,75 @@ public class TestLogRolling {
}
}
/**
* Tests that logs are deleted when some region has a compaction
* record in WAL and no other records. See HBASE-8597.
*/
@Test
public void testCompactionRecordDoesntBlockRolling() throws Exception {
// When the META table can be opened, the region servers are running
new HTable(TEST_UTIL.getConfiguration(), HConstants.META_TABLE_NAME);
String tableName = getName();
HTable table = createTestTable(tableName);
String tableName2 = tableName + "1";
HTable table2 = createTestTable(tableName2);
server = TEST_UTIL.getRSForFirstRegionInTable(Bytes.toBytes(tableName));
this.log = server.getWAL();
FSHLog fshLog = (FSHLog)log;
HRegion region = server.getOnlineRegions(table2.getTableName()).get(0);
Store s = region.getStore(HConstants.CATALOG_FAMILY);
// Put some stuff into table2, to make sure we have some files to compact.
for (int i = 1; i <= 2; ++i) {
doPut(table2, i);
admin.flush(table2.getTableName());
}
doPut(table2, 3); // don't flush yet, or compaction might trigger before we roll WAL
assertEquals("Should have no WAL after initial writes", 0, fshLog.getNumLogFiles());
assertEquals(2, s.getStorefilesCount());
// Roll the log and compact table2, to have compaction record in the 2nd WAL.
fshLog.rollWriter();
assertEquals("Should have WAL; one table is not flushed", 1, fshLog.getNumLogFiles());
admin.flush(table2.getTableName());
region.compactStores();
// Wait for compaction in case if flush triggered it before us.
Assert.assertNotNull(s);
for (int waitTime = 3000; s.getStorefilesCount() > 1 && waitTime > 0; waitTime -= 200) {
Threads.sleepWithoutInterrupt(200);
}
assertEquals("Compaction didn't happen", 1, s.getStorefilesCount());
// Write some value to the table so the WAL cannot be deleted until table is flushed.
doPut(table, 0); // Now 2nd WAL will have compaction record for table2 and put for table.
fshLog.rollWriter(); // 1st WAL deleted, 2nd not deleted yet.
assertEquals("Should have WAL; one table is not flushed", 1, fshLog.getNumLogFiles());
// Flush table to make latest WAL obsolete; write another record, and roll again.
admin.flush(table.getTableName());
doPut(table, 1);
fshLog.rollWriter(); // Now 2nd WAL is deleted and 3rd is added.
assertEquals("Should have 1 WALs at the end", 1, fshLog.getNumLogFiles());
table.close();
table2.close();
}
private void doPut(HTable table, int i) throws IOException {
Put put = new Put(Bytes.toBytes("row" + String.format("%1$04d", i)));
put.add(HConstants.CATALOG_FAMILY, null, value);
table.put(put);
}
private HTable createTestTable(String tableName) throws IOException {
// Create the test table and open it
HTableDescriptor desc = new HTableDescriptor(tableName);
desc.addFamily(new HColumnDescriptor(HConstants.CATALOG_FAMILY));
admin.createTable(desc);
return new HTable(TEST_UTIL.getConfiguration(), tableName);
}
}