Thomas Mueller created OAK-8067:
-----------------------------------
Summary: Delete NRT index before closing to (hopefully) avoid /
speed up fsync
Key: OAK-8067
URL: https://issues.apache.org/jira/browse/OAK-8067
Project: Jackrabbit Oak
Issue Type: Improvement
Components: lucene
Reporter: Thomas Mueller
Assignee: Thomas Mueller
We have seen the following stack trace, and saw that fsync was seemingly very
slow on the system.
Two issues: (1) fsync seems to be very slow here (2) fsync is called while
holding a lock.
(2) should be resolved by lazy-loading indexes.
{noformat}
"oak-lucene-22" daemon prio=1 tid=0x6b1 nid=0xffffffff runnable
java.lang.Thread.State: RUNNABLE
atjava.io.FileDescriptor.sync(Native Method)
at org.apache.lucene.store.FSDirectory.fsync(FSDirectory.java:505)
at org.apache.lucene.store.FSDirectory.sync(FSDirectory.java:307)
at
org.apache.lucene.store.NRTCachingDirectory.sync(NRTCachingDirectory.java:219)
at
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4489)
at
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2953)
- locked <0x20595abf> (a java.lang.Object)
at
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:3049)
- locked <0x20595abf> (a java.lang.Object)
at
org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:1041)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:932)
- locked <0x20595abf> (a java.lang.Object)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:894)
at
org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.NRTIndex.close(NRTIndex.java:206)
at
org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.NRTIndexFactory.closeLast(NRTIndexFactory.java:133)
at
org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.NRTIndexFactory.createIndex(NRTIndexFactory.java:89)
- locked <0x85f9b65> (a
org.apache.jackrabbit.oak.plugins.index.lucene.hybrid.NRTIndexFactory)
at
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndexNodeManager.open(LuceneIndexNodeManager.java:73)
at
org.apache.jackrabbit.oak.plugins.index.lucene.IndexTracker$1.leave(IndexTracker.java:154)
at
org.apache.jackrabbit.oak.spi.commit.EditorDiff.childNodeChanged(EditorDiff.java:152)
at
org.apache.jackrabbit.oak.composite.CompositeNodeState$WrappingDiff.childNodeChanged(CompositeNodeState.java:309)
at
org.apache.jackrabbit.oak.composite.CompositeNodeState$ChildrenDiffFilter.childNodeChanged(CompositeNodeState.java:256)
at
org.apache.jackrabbit.oak.plugins.document.JsopNodeStateDiffer.compareExisting(JsopNodeStateDiffer.java:100)
at
org.apache.jackrabbit.oak.plugins.document.JsopNodeStateDiffer.access$000(JsopNodeStateDiffer.java:27)
at
org.apache.jackrabbit.oak.plugins.document.JsopNodeStateDiffer$1.childNodeChanged(JsopNodeStateDiffer.java:65)
at
org.apache.jackrabbit.oak.plugins.document.DiffCache.parseJsopDiff(DiffCache.java:118)
at
org.apache.jackrabbit.oak.plugins.document.JsopNodeStateDiffer.compare(JsopNodeStateDiffer.java:51)
at
org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.compare(DocumentNodeStore.java:1766)
at
org.apache.jackrabbit.oak.plugins.document.AbstractDocumentNodeState.compareAgainstBaseState(AbstractDocumentNodeState.java:113)
at
org.apache.jackrabbit.oak.composite.CompositeNodeState.compareAgainstBaseState(CompositeNodeState.java:163)
at
org.apache.jackrabbit.oak.spi.commit.EditorDiff.childNodeChanged(EditorDiff.java:147)
at
org.apache.jackrabbit.oak.composite.CompositeNodeState$WrappingDiff.childNodeChanged(CompositeNodeState.java:309)
at
org.apache.jackrabbit.oak.composite.CompositeNodeState$ChildrenDiffFilter.childNodeChanged(CompositeNodeState.java:256)
at
org.apache.jackrabbit.oak.plugins.document.JsopNodeStateDiffer.compareExisting(JsopNodeStateDiffer.java:100)
at
org.apache.jackrabbit.oak.plugins.document.JsopNodeStateDiffer.access$000(JsopNodeStateDiffer.java:27)
at
org.apache.jackrabbit.oak.plugins.document.JsopNodeStateDiffer$1.childNodeChanged(JsopNodeStateDiffer.java:65)
at
org.apache.jackrabbit.oak.plugins.document.DiffCache.parseJsopDiff(DiffCache.java:118)
at
org.apache.jackrabbit.oak.plugins.document.JsopNodeStateDiffer.compare(JsopNodeStateDiffer.java:51)
at
org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.compare(DocumentNodeStore.java:1766)
at
org.apache.jackrabbit.oak.plugins.document.AbstractDocumentNodeState.compareAgainstBaseState(AbstractDocumentNodeState.java:113)
at
org.apache.jackrabbit.oak.composite.CompositeNodeState.compareAgainstBaseState(CompositeNodeState.java:163)
at
org.apache.jackrabbit.oak.spi.commit.EditorDiff.process(EditorDiff.java:51)
at
org.apache.jackrabbit.oak.plugins.index.lucene.IndexTracker.diffAndUpdate(IndexTracker.java:165)
- locked <0x67aaaebc> (a
org.apache.jackrabbit.oak.plugins.index.lucene.IndexTracker)
at
org.apache.jackrabbit.oak.plugins.index.lucene.IndexTracker.update(IndexTracker.java:120)
- locked <0x67aaaebc> (a
org.apache.jackrabbit.oak.plugins.index.lucene.IndexTracker)
at
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndexProvider.contentChanged(LuceneIndexProvider.java:73)
at
org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1.call(BackgroundObserver.java:127)
at
org.apache.jackrabbit.oak.spi.commit.BackgroundObserver$1$1.call(BackgroundObserver.java:121)
atjava.util.concurrent.FutureTask.run(FutureTask.java:264)
atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
atjava.lang.Thread.run(Thread.java:834)
{noformat}
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