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Remove isRecovering method from Engine (#47039) 

We already prevent flushing in Engine if it's recovering. Hence, we can
remove the protection in IndexShard.
This commit is contained in:
Nhat Nguyen 2019-09-25 08:25:14 -04:00
parent c4a166fc9a
commit 22575bd7e6
4 changed files with 12 additions and 32 deletions
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7
server/src/main/java/org/elasticsearch/index/engine/Engine.java
View File

@ -1874,13 +1874,6 @@ public abstract class Engine implements Closeable {
*/
public abstract void skipTranslogRecovery();
/**
* Returns <code>true</code> iff this engine is currently recovering from translog.
*/
public boolean isRecovering() {
return false;
}
/**
* Tries to prune buffered deletes from the version map.
*/

7
server/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
View File

@ -2461,7 +2461,7 @@ public class InternalEngine extends Engine {
}
}
private void ensureCanFlush() {
final void ensureCanFlush() {
// translog recover happens after the engine is fully constructed
// if we are in this stage we have to prevent flushes from this
// engine otherwise we might loose documents if the flush succeeds
@ -2659,11 +2659,6 @@ public class InternalEngine extends Engine {
}
}
@Override
public boolean isRecovering() {
return pendingTranslogRecovery.get();
}
/**
* Gets the commit data from {@link IndexWriter} as a map.
*/

16
server/src/main/java/org/elasticsearch/index/shard/IndexShard.java
View File

@ -1054,12 +1054,7 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
public Engine.SyncedFlushResult syncFlush(String syncId, Engine.CommitId expectedCommitId) {
verifyNotClosed();
logger.trace("trying to sync flush. sync id [{}]. expected commit id [{}]]", syncId, expectedCommitId);
Engine engine = getEngine();
if (engine.isRecovering()) {
throw new IllegalIndexShardStateException(shardId(), state, "syncFlush is only allowed if the engine is not recovery" +
" from translog");
}
return engine.syncFlush(syncId, expectedCommitId);
return getEngine().syncFlush(syncId, expectedCommitId);
}
/**
@ -1078,15 +1073,8 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
* since we use Engine#writeIndexingBuffer for this now.
*/
verifyNotClosed();
final Engine engine = getEngine();
if (engine.isRecovering()) {
throw new IllegalIndexShardStateException(
shardId(),
state,
"flush is only allowed if the engine is not recovery from translog");
}
final long time = System.nanoTime();
final Engine.CommitId commitId = engine.flush(force, waitIfOngoing);
final Engine.CommitId commitId = getEngine().flush(force, waitIfOngoing);
flushMetric.inc(System.nanoTime() - time);
return commitId;
}

12
server/src/test/java/org/elasticsearch/index/engine/InternalEngineTests.java
View File

@ -729,16 +729,20 @@ public class InternalEngineTests extends EngineTestCase {
}
public void testFlushIsDisabledDuringTranslogRecovery() throws IOException {
assertFalse(engine.isRecovering());
engine.ensureCanFlush(); // recovered already
ParsedDocument doc = testParsedDocument("1", null, testDocumentWithTextField(), SOURCE, null);
engine.index(indexForDoc(doc));
engine.close();
engine = new InternalEngine(engine.config());
expectThrows(IllegalStateException.class, engine::ensureCanFlush);
expectThrows(IllegalStateException.class, () -> engine.flush(true, true));
assertTrue(engine.isRecovering());
if (randomBoolean()) {
engine.recoverFromTranslog(translogHandler, Long.MAX_VALUE);
assertFalse(engine.isRecovering());
} else {
engine.skipTranslogRecovery();
}
engine.ensureCanFlush(); // ready
doc = testParsedDocument("2", null, testDocumentWithTextField(), SOURCE, null);
engine.index(indexForDoc(doc));
engine.flush();
@ -2825,7 +2829,7 @@ public class InternalEngineTests extends EngineTestCase {
{
for (int i = 0; i < 2; i++) {
try (InternalEngine engine = new InternalEngine(config)) {
assertTrue(engine.isRecovering());
expectThrows(IllegalStateException.class, engine::ensureCanFlush);
Map<String, String> userData = engine.getLastCommittedSegmentInfos().getUserData();
if (i == 0) {
assertEquals("1", userData.get(Translog.TRANSLOG_GENERATION_KEY));