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Do not add noop from local translog to translog again (#29637)

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Today we always add no-ops to translog regardless of its origin, thus a
noop may appear in the translog multiple times. This is not a big deal
as noops are small and rare to appear.

This commit ensures to add a noop to translog only if its origin is not
from local translog. This restriction has been applied for index and
delete.
This commit is contained in:
Nhat Nguyen 2018-04-25 21:02:12 -04:00 committed by GitHub
parent a8f40b3e04
commit 52c50e353b
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 21 additions and 11 deletions
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6
server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
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@ -1269,8 +1269,10 @@ public class InternalEngine extends Engine {
final long seqNo = noOp.seqNo();
try {
final NoOpResult noOpResult = new NoOpResult(noOp.seqNo());
final Translog.Location location = translog.add(new Translog.NoOp(noOp.seqNo(), noOp.primaryTerm(), noOp.reason()));
noOpResult.setTranslogLocation(location);
if (noOp.origin() != Operation.Origin.LOCAL_TRANSLOG_RECOVERY) {
final Translog.Location location = translog.add(new Translog.NoOp(noOp.seqNo(), noOp.primaryTerm(), noOp.reason()));
noOpResult.setTranslogLocation(location);
}
noOpResult.setTook(System.nanoTime() - noOp.startTime());
noOpResult.freeze();
return noOpResult;

16
server/src/test/java/org/elasticsearch/index/engine/InternalEngineTests.java
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@ -3724,15 +3724,13 @@ public class InternalEngineTests extends EngineTestCase {
noOpEngine.recoverFromTranslog();
final int gapsFilled = noOpEngine.fillSeqNoGaps(primaryTerm.get());
final String reason = randomAlphaOfLength(16);
noOpEngine.noOp(
new Engine.NoOp(
maxSeqNo + 1,
primaryTerm.get(),
randomFrom(PRIMARY, REPLICA, PEER_RECOVERY, LOCAL_TRANSLOG_RECOVERY),
System.nanoTime(),
reason));
noOpEngine.noOp(new Engine.NoOp(maxSeqNo + 1, primaryTerm.get(), LOCAL_TRANSLOG_RECOVERY, System.nanoTime(), reason));
assertThat(noOpEngine.getLocalCheckpointTracker().getCheckpoint(), equalTo((long) (maxSeqNo + 1)));
assertThat(noOpEngine.getTranslog().stats().getUncommittedOperations(), equalTo(1 + gapsFilled));
assertThat(noOpEngine.getTranslog().stats().getUncommittedOperations(), equalTo(gapsFilled));
noOpEngine.noOp(
new Engine.NoOp(maxSeqNo + 2, primaryTerm.get(), randomFrom(PRIMARY, REPLICA, PEER_RECOVERY), System.nanoTime(), reason));
assertThat(noOpEngine.getLocalCheckpointTracker().getCheckpoint(), equalTo((long) (maxSeqNo + 2)));
assertThat(noOpEngine.getTranslog().stats().getUncommittedOperations(), equalTo(gapsFilled + 1));
// skip to the op that we added to the translog
Translog.Operation op;
Translog.Operation last = null;
@ -3744,7 +3742,7 @@ public class InternalEngineTests extends EngineTestCase {
assertNotNull(last);
assertThat(last, instanceOf(Translog.NoOp.class));
final Translog.NoOp noOp = (Translog.NoOp) last;
assertThat(noOp.seqNo(), equalTo((long) (maxSeqNo + 1)));
assertThat(noOp.seqNo(), equalTo((long) (maxSeqNo + 2)));
assertThat(noOp.primaryTerm(), equalTo(primaryTerm.get()));
assertThat(noOp.reason(), equalTo(reason));
} finally {

10
server/src/test/java/org/elasticsearch/index/shard/IndexShardTests.java
View File

@ -1661,6 +1661,16 @@ public class IndexShardTests extends IndexShardTestCase {
IndexShardTestCase.updateRoutingEntry(newShard, newShard.routingEntry().moveToStarted());
assertDocCount(newShard, 1);
assertDocCount(shard, 2);
for (int i = 0; i < 2; i++) {
newShard = reinitShard(newShard, ShardRoutingHelper.initWithSameId(primaryShardRouting,
RecoverySource.StoreRecoverySource.EXISTING_STORE_INSTANCE));
newShard.markAsRecovering("store", new RecoveryState(newShard.routingEntry(), localNode, null));
assertTrue(newShard.recoverFromStore());
try (Translog.Snapshot snapshot = getTranslog(newShard).newSnapshot()) {
assertThat(snapshot.totalOperations(), equalTo(2));
}
}
closeShards(newShard, shard);
}