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https://issues.apache.org/jira/browse/OAK-4861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15592080#comment-15592080
]
Wim Symons commented on OAK-4861:
---------------------------------
Hi we have exactly the same issue as you have. Except it uses almost all of our
CPU.
Stacktrace:
"pool-7-thread-4" - Thread t@114
java.lang.Thread.State: RUNNABLE
at
org.apache.jackrabbit.oak.plugins.index.lucene.OakDirectory$OakIndexFile.<init>(OakDirectory.java:255)
at
org.apache.jackrabbit.oak.plugins.index.lucene.OakDirectory$OakIndexFile.<init>(OakDirectory.java:205)
at
org.apache.jackrabbit.oak.plugins.index.lucene.OakDirectory$OakIndexInput.<init>(OakDirectory.java:404)
at
org.apache.jackrabbit.oak.plugins.index.lucene.OakDirectory$OakIndexInput.clone(OakDirectory.java:412)
at
org.apache.jackrabbit.oak.plugins.index.lucene.OakDirectory$OakIndexInput.clone(OakDirectory.java:388)
at
org.apache.lucene.codecs.BlockTreeTermsReader$FieldReader.<init>(BlockTreeTermsReader.java:481)
at
org.apache.lucene.codecs.BlockTreeTermsReader.<init>(BlockTreeTermsReader.java:176)
at
org.apache.lucene.codecs.lucene41.Lucene41PostingsFormat.fieldsProducer(Lucene41PostingsFormat.java:437)
at
org.apache.lucene.index.SegmentCoreReaders.<init>(SegmentCoreReaders.java:116)
at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:96)
at
org.apache.lucene.index.ReadersAndUpdates.getReader(ReadersAndUpdates.java:141)
at
org.apache.lucene.index.BufferedUpdatesStream.applyDeletesAndUpdates(BufferedUpdatesStream.java:279)
- locked <7e04344b> (a org.apache.lucene.index.BufferedUpdatesStream)
at
org.apache.lucene.index.IndexWriter.applyAllDeletesAndUpdates(IndexWriter.java:3191)
- locked <50c64b3b> (a org.apache.lucene.index.IndexWriter)
at org.apache.lucene.index.IndexWriter.maybeApplyDeletes(IndexWriter.java:3182)
- locked <50c64b3b> (a org.apache.lucene.index.IndexWriter)
at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3155)
- locked <50c64b3b> (a org.apache.lucene.index.IndexWriter)
at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3123)
at org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:988)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:932)
- locked <6c1af558> (a java.lang.Object)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:894)
at
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndexEditorContext.closeWriter(LuceneIndexEditorContext.java:250)
at
org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndexEditor.leave(LuceneIndexEditor.java:214)
at
org.apache.jackrabbit.oak.plugins.index.IndexUpdate.leave(IndexUpdate.java:252)
at
org.apache.jackrabbit.oak.spi.commit.VisibleEditor.leave(VisibleEditor.java:63)
at org.apache.jackrabbit.oak.spi.commit.EditorDiff.process(EditorDiff.java:56)
at
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate.updateIndex(AsyncIndexUpdate.java:491)
at
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate.runWhenPermitted(AsyncIndexUpdate.java:433)
at
org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate.run(AsyncIndexUpdate.java:325)
- locked <5472cf2> (a org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate)
at
org.apache.sling.commons.scheduler.impl.QuartzJobExecutor.execute(QuartzJobExecutor.java:115)
at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Locked ownable synchronizers:
- locked <788eb307> (a java.util.concurrent.ThreadPoolExecutor$Worker)
We have it on oak-lucene version 1.2.16 on AEM 6.1 SP1.
What I also did is to attach a Java debugger to the AEM process and set a
logging breakpoint at OakDirectory.java:255. If I enable the breakpoint, CPU
drops to 2-3%. If I disable the breakpoint CPU rises again to 50%.
So I think it is a concurrency issue. I also have a trace level output as
mentioned above, but nothing to see there.
To be complete, we are using a segment datastore (TarMK), CopyOnRead is
enabled, CopyOnWrite is disabled and the number of threads is 5.
Did you find a solution for this already? At the moment all our production
instances have this issue. We opened a P1 ticket at Daycare, but so far no luck.
> AsyncIndexUpdate consuming constantly 1 CPU core
> ------------------------------------------------
>
> Key: OAK-4861
> URL: https://issues.apache.org/jira/browse/OAK-4861
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Affects Versions: 1.0.31
> Reporter: Jörg Hoh
>
> The AsyncIndexUpdate thread takes a long time on some of our environments to
> update the index for a few nodes:
> {noformat}
> 28.09.2016 18:23:49.405 *DEBUG* [pool-11-thread-1]
> org.apache.jackrabbit.oak.plugins.index.AsyncIndexUpdate AsyncIndex (async)
> update run completed in 3,369 min. Indexed 14 nodes
> {noformat}
> I set the log to DEBUG for investigation and during the time I saw constantly
> such times; this instance is a test instance and there was no activity from
> the outside during this time. I also can confirm such times from other
> environments.
> The immediately visible problem is that this instance (and others as well)
> constantly consume at least 1 CPU core, no matter what activity happens on
> the system. This only happens on the master node of our DocumentNodeStore
> clusters.
> I did a number of threaddumps during investigation and a common stacktrace
> for the AsyncIndexUpdate was like this:
> {noformat}
> 3XMTHREADINFO "pool-11-thread-1" J9VMThread:0x0000000001E69C00,
> j9thread_t:0x00007FFFBE101CB0, java/lang/Thread:0x00000001077FE938, state:R,
> prio=5
> 3XMJAVALTHREAD (java/lang/Thread getId:0x10A, isDaemon:false)
> 3XMTHREADINFO1 (native thread ID:0x3C781, native priority:0x5, native
> policy:UNKNOWN, vmstate:CW, vm thread flags:0x00000001)
> 3XMTHREADINFO2 (native stack address range from:0x00007FFFC696A000,
> to:0x00007FFFC69AB000, size:0x41000)
> 3XMCPUTIME CPU usage total: 992425.397213554 secs, current
> category="Application"
> 3XMHEAPALLOC Heap bytes allocated since last GC cycle=735893672 (0x2BDCD8A8)
> 3XMTHREADINFO3 Java callstack:
> 4XESTACKTRACE at
> com/google/common/collect/Lists.newArrayList(Lists.java:128(Compiled Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/lucene/OakDirectory$OakIndexFile.<init>(OakDirectory.java:255(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/lucene/OakDirectory$OakIndexFile.<init>(OakDirectory.java:201(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/lucene/OakDirectory$OakIndexInput.<init>(OakDirectory.java:400(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/lucene/OakDirectory$OakIndexInput.clone(OakDirectory.java:408(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/lucene/OakDirectory$OakIndexInput.clone(OakDirectory.java:384(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/store/Directory$SlicedIndexInput.clone(Directory.java:288(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/store/Directory$SlicedIndexInput.clone(Directory.java:269(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/codecs/BlockTreeTermsReader$FieldReader.<init>(BlockTreeTermsReader.java:481(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/codecs/BlockTreeTermsReader.<init>(BlockTreeTermsReader.java:176(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/codecs/lucene41/Lucene41PostingsFormat.fieldsProducer(Lucene41PostingsFormat.java:437(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/index/SegmentCoreReaders.<init>(SegmentCoreReaders.java:116(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/index/SegmentReader.<init>(SegmentReader.java:96(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/index/ReadersAndUpdates.getReader(ReadersAndUpdates.java:141(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/index/BufferedUpdatesStream.applyDeletesAndUpdates(BufferedUpdatesStream.java:279(Compiled
> Code))
> 5XESTACKTRACE (entered lock:
> org/apache/lucene/index/BufferedUpdatesStream@0x00000002245B4100, entry
> count: 1)
> 4XESTACKTRACE at
> org/apache/lucene/index/IndexWriter.applyAllDeletesAndUpdates(IndexWriter.java:3191(Compiled
> Code))
> 5XESTACKTRACE (entered lock:
> org/apache/lucene/index/IndexWriter@0x00000002245B4050, entry count: 3)
> 4XESTACKTRACE at
> org/apache/lucene/index/IndexWriter.maybeApplyDeletes(IndexWriter.java:3182(Compiled
> Code))
> 5XESTACKTRACE (entered lock:
> org/apache/lucene/index/IndexWriter@0x00000002245B4050, entry count: 2)
> 4XESTACKTRACE at
> org/apache/lucene/index/IndexWriter.doFlush(IndexWriter.java:3155(Compiled
> Code))
> 5XESTACKTRACE (entered lock:
> org/apache/lucene/index/IndexWriter@0x00000002245B4050, entry count: 1)
> 4XESTACKTRACE at
> org/apache/lucene/index/IndexWriter.flush(IndexWriter.java:3123(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/index/IndexWriter.closeInternal(IndexWriter.java:988(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/lucene/index/IndexWriter.close(IndexWriter.java:932(Compiled Code))
> 5XESTACKTRACE (entered lock: java/lang/Object@0x00000002245B9398, entry
> count: 1)
> 4XESTACKTRACE at
> org/apache/lucene/index/IndexWriter.close(IndexWriter.java:894(Compiled Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditorContext.closeWriter(LuceneIndexEditorContext.java:235(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/lucene/LuceneIndexEditor.leave(LuceneIndexEditor.java:207(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/IndexUpdate.leave(IndexUpdate.java:250(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/spi/commit/VisibleEditor.leave(VisibleEditor.java:63(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/spi/commit/EditorDiff.process(EditorDiff.java:56(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/AsyncIndexUpdate.updateIndex(AsyncIndexUpdate.java:372(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/jackrabbit/oak/plugins/index/AsyncIndexUpdate.run(AsyncIndexUpdate.java:322(Compiled
> Code))
> 5XESTACKTRACE (entered lock:
> org/apache/jackrabbit/oak/plugins/index/AsyncIndexUpdate@0x000000010447CCF0,
> entry count: 1)
> 4XESTACKTRACE at
> org/apache/sling/commons/scheduler/impl/QuartzJobExecutor.execute(QuartzJobExecutor.java:115(Compiled
> Code))
> 4XESTACKTRACE at
> org/quartz/core/JobRunShell.run(JobRunShell.java:202(Compiled Code))
> 4XESTACKTRACE at
> java/util/concurrent/ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1157(Compiled
> Code))
> 4XESTACKTRACE at
> java/util/concurrent/ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:627)
> 4XESTACKTRACE at java/lang/Thread.run(Thread.java:809)
> {noformat}
> I don't think, that we had such a behaviour a few months ago.
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