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HBASE-21504 If enable FIFOCompactionPolicy, a compaction may write a "empty" hfile whose maxTimeStamp is long max. This kind of hfile will never be archived.

This commit is contained in:
huzheng 2018-11-29 18:00:18 +08:00
parent 3ad2a89fdf
commit d42e0ade1c
2 changed files with 89 additions and 10 deletions
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32
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/FIFOCompactionPolicy.java
View File

@ -96,16 +96,29 @@ public class FIFOCompactionPolicy extends ExploringCompactionPolicy {
return hasExpiredStores(storeFiles);
}
/**
* The FIFOCompactionPolicy only choose those TTL expired HFiles as the compaction candidates. So
* if all HFiles are TTL expired, then the compaction will generate a new empty HFile. While its
* max timestamp will be Long.MAX_VALUE. If not considered separately, the HFile will never be
* archived because its TTL will be never expired. So we'll check the empty store file separately.
* (See HBASE-21504)
*/
private boolean isEmptyStoreFile(HStoreFile sf) {
return sf.getReader().getEntries() == 0;
}
private boolean hasExpiredStores(Collection<HStoreFile> files) {
long currentTime = EnvironmentEdgeManager.currentTime();
for(HStoreFile sf: files){
for (HStoreFile sf : files) {
if (isEmptyStoreFile(sf)) {
return true;
}
// Check MIN_VERSIONS is in HStore removeUnneededFiles
long maxTs = sf.getReader().getMaxTimestamp();
long maxTtl = storeConfigInfo.getStoreFileTtl();
if (maxTtl == Long.MAX_VALUE
|| (currentTime - maxTtl < maxTs)){
if (maxTtl == Long.MAX_VALUE || (currentTime - maxTtl < maxTs)) {
continue;
} else{
} else {
return true;
}
}
@ -116,14 +129,17 @@ public class FIFOCompactionPolicy extends ExploringCompactionPolicy {
Collection<HStoreFile> filesCompacting) {
long currentTime = EnvironmentEdgeManager.currentTime();
Collection<HStoreFile> expiredStores = new ArrayList<>();
for(HStoreFile sf: files){
for (HStoreFile sf : files) {
if (isEmptyStoreFile(sf)) {
expiredStores.add(sf);
continue;
}
// Check MIN_VERSIONS is in HStore removeUnneededFiles
long maxTs = sf.getReader().getMaxTimestamp();
long maxTtl = storeConfigInfo.getStoreFileTtl();
if (maxTtl == Long.MAX_VALUE
|| (currentTime - maxTtl < maxTs)){
if (maxTtl == Long.MAX_VALUE || (currentTime - maxTtl < maxTs)) {
continue;
} else if(filesCompacting == null || !filesCompacting.contains(sf)){
} else if (filesCompacting == null || !filesCompacting.contains(sf)) {
expiredStores.add(sf);
}
}

63
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/compactions/TestFIFOCompactionPolicy.java
View File

@ -22,6 +22,7 @@ import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HBaseClassTestRule;
@ -41,6 +42,7 @@ import org.apache.hadoop.hbase.regionserver.DisabledRegionSplitPolicy;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.HRegionServer;
import org.apache.hadoop.hbase.regionserver.HStore;
import org.apache.hadoop.hbase.regionserver.HStoreFile;
import org.apache.hadoop.hbase.testclassification.MediumTests;
import org.apache.hadoop.hbase.testclassification.RegionServerTests;
import org.apache.hadoop.hbase.util.Bytes;
@ -49,6 +51,7 @@ import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.JVMClusterUtil;
import org.apache.hadoop.hbase.util.TimeOffsetEnvironmentEdge;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Rule;
@ -191,4 +194,64 @@ public class TestFIFOCompactionPolicy {
.build();
TEST_UTIL.getAdmin().createTable(desc);
}
/**
* Unit test for HBASE-21504
*/
@Test
public void testFIFOCompactionPolicyExpiredEmptyHFiles() throws Exception {
TableName tableName = TableName.valueOf("testFIFOCompactionPolicyExpiredEmptyHFiles");
TableDescriptor desc = TableDescriptorBuilder.newBuilder(tableName)
.setValue(DefaultStoreEngine.DEFAULT_COMPACTION_POLICY_CLASS_KEY,
FIFOCompactionPolicy.class.getName())
.setValue(HConstants.HBASE_REGION_SPLIT_POLICY_KEY,
DisabledRegionSplitPolicy.class.getName())
.setColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(family).setTimeToLive(1).build())
.build();
Table table = TEST_UTIL.createTable(desc, null);
long ts = System.currentTimeMillis() - 10 * 1000;
Put put =
new Put(Bytes.toBytes("row1")).addColumn(family, qualifier, ts, Bytes.toBytes("value0"));
table.put(put);
TEST_UTIL.getAdmin().flush(tableName); // HFile-0
put = new Put(Bytes.toBytes("row2")).addColumn(family, qualifier, ts, Bytes.toBytes("value1"));
table.put(put);
TEST_UTIL.getAdmin().flush(tableName); // HFile-1
HStore store = getStoreWithName(tableName);
Assert.assertNotNull(store);
Assert.assertEquals(2, store.getStorefilesCount());
TEST_UTIL.getAdmin().majorCompact(tableName);
for (int i = 0; i < 100; i++) {
if (store.getStorefilesCount() > 1) {
Thread.sleep(100);
} else {
break;
}
}
Assert.assertEquals(1, store.getStorefilesCount());
HStoreFile sf = store.getStorefiles().iterator().next();
Assert.assertNotNull(sf);
Assert.assertEquals(0, sf.getReader().getEntries());
put = new Put(Bytes.toBytes("row3")).addColumn(family, qualifier, ts, Bytes.toBytes("value1"));
table.put(put);
TEST_UTIL.getAdmin().flush(tableName); // HFile-2
Assert.assertEquals(2, store.getStorefilesCount());
TEST_UTIL.getAdmin().majorCompact(tableName);
for (int i = 0; i < 100; i++) {
if (store.getStorefilesCount() > 1) {
Thread.sleep(100);
} else {
break;
}
}
Assert.assertEquals(1, store.getStorefilesCount());
sf = store.getStorefiles().iterator().next();
Assert.assertNotNull(sf);
Assert.assertEquals(0, sf.getReader().getEntries());
}
}