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Elemer Kisch commented on OAK-4861: ----------------------------------- Commented by [~jhoh] in the DC: "As Chetan pointed out to me, that CopyOnWrite has not been enabled on this environment and also the "indexPath" property was missing on /oak:index/lucene, I redid the tests on a different environment (hardening env). Here the closing the IndexWriter takes about 10 sec, both with CopyOnWrite disabled and enabled, with or without the indexPath property being present on /oak:index/lucene. I attach the logfile with the mentioned loggers being set to Trace." > 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 > Attachments: si09ent-cqa-243-async-index-update.log > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)