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From Yonik Seeley <yo...@lucidimagination.com>
Subject Re: Tomcat Threads are BLOCKED after some time
Date Tue, 03 Mar 2009 13:51:02 GMT
Hmmm, if this is some sort of deadlock, we may need a thread dump of
all of the threads.
Does your app with Lucene 2.4 have the same problem?
Is it possible to try a newer JVM version (like 1.6.0_12)?

-Yonik
http://www.lucidimagination.com


On Tue, Mar 3, 2009 at 8:13 AM, damu_verse <damoder.reddy@gmail.com> wrote:
>
> Hi All,
>
>         We Have used Lucene as our Search Engine and all our applications
> are deployed onto tomcat and running with thread pool size of 200.
>
> Java Version - 1.6.0-rc
> Lucene Version - 2.3.2
> Tomcat Version - 6.0.14
> OS - Red Hat Enterprise Linux ES release 4 (Nahant Update 5)
> kernel - 2.6.9-55.0.2.ELsmp
> RAM - 4 GB
> Tomcat Memory - 1.5 GB
> Index Size -  2 GB
>
>
>                                 After 10-12 hrs of tomcat running, tomcat
> becomes irresponsive. After doing core dump of tomcat process We observed
> that all tomcat threads are blocked (Thread-pool size-200). none of the
> tomcat threads are in runnable state.
>
> each thread at the time of the core dump is in BLOCKED state...The following
> are the stack trace of blocked.
>
> "MultiSearcher thread #3" daemon prio=10 tid=0x337ddc00 nid=0x4827 waiting
> for monitor entry [0x2f2f0000..0x2f2f0ea0]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:235)
>        - waiting to lock <0x45d49d88> (a
> org.apache.lucene.store.FSDirectory$FSIndexInput)
>        at
> org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:152)
>        at
> org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:38)
>        at org.apache.lucene.store.IndexInput.readVInt(IndexInput.java:76)
>        at org.apache.lucene.index.TermBuffer.read(TermBuffer.java:63)
>        at org.apache.lucene.index.SegmentTermEnum.next(SegmentTermEnum.java:123)
>        at org.apache.lucene.index.SegmentTermEnum.scanTo(SegmentTermEnum.java:154)
>        at
> org.apache.lucene.index.TermInfosReader.scanEnum(TermInfosReader.java:223)
>        at org.apache.lucene.index.TermInfosReader.get(TermInfosReader.java:217)
>        at org.apache.lucene.index.SegmentTermDocs.seek(SegmentTermDocs.java:54)
>        at org.apache.lucene.index.IndexReader.termDocs(IndexReader.java:668)
>        at
> org.apache.lucene.search.ConstantScoreTermQuery$TermWeight.scorer(ConstantScoreTermQuery.java:63)
>        at
> org.apache.lucene.search.VBooleanQuery$BooleanWeight.scorer(VBooleanQuery.java:276)
>        at
> org.apache.lucene.search.BooleanQuery$BooleanWeight.scorer(BooleanQuery.java:232)
>        at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:143)
>        at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:124)
>        at
> org.apache.lucene.search.MultiSearcherThread.run(ParallelMultiSearcher.java:250)
>
>
>
> "http-8080-194" daemon prio=10 tid=0x08927800 nid=0x128d waiting for monitor
> entry [0x2e188000..0x2e189e20]
>   java.lang.Thread.State: BLOCKED (on object monitor)
>        at
> org.apache.lucene.index.CompoundFileReader$CSIndexInput.readInternal(CompoundFileReader.java:235)
>        - waiting to lock <0x45d49d88> (a
> org.apache.lucene.store.FSDirectory$FSIndexInput)
>        at
> org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:152)
>        at
> org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:38)
>        at org.apache.lucene.store.IndexInput.readVLong(IndexInput.java:96)
>        at
> org.apache.lucene.index.MultiLevelSkipListReader.loadSkipLevels(MultiLevelSkipListReader.java:196)
>        at
> org.apache.lucene.index.MultiLevelSkipListReader.skipTo(MultiLevelSkipListReader.java:97)
>        at org.apache.lucene.index.SegmentTermDocs.skipTo(SegmentTermDocs.java:164)
>        at in.verse.search.query.spans.TermSpans.skipTo(TermSpans.java:85)
>        at in.verse.search.query.spans.SpanScorer.skipTo(SpanScorer.java:70)
>        at
> org.apache.lucene.search.VConjunctionScorer.doNext(VConjunctionScorer.java:78)
>        at
> org.apache.lucene.search.VConjunctionScorer.next(VConjunctionScorer.java:71)
>        at org.apache.lucene.search.VBooleanScorer2.next(VBooleanScorer2.java:456)
>        at
> org.apache.lucene.search.VConjunctionScorer.init(VConjunctionScorer.java:136)
>        at
> org.apache.lucene.search.VConjunctionScorer.next(VConjunctionScorer.java:65)
>        at org.apache.lucene.search.VBooleanScorer2.score(VBooleanScorer2.java:412)
>        at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:146)
>        at
> org.apache.lucene.search.ParallelMultiSearcher.search(ParallelMultiSearcher.java:173)
>        at org.apache.lucene.search.Searcher.search(Searcher.java:118)
>        at org.apache.lucene.search.Searcher.search(Searcher.java:97)
>        at VSearcher$VerticalSearcher$1.call(VSearcher.java:500)
>        at VSearcher$VerticalSearcher$1.call(VSearcher.java:491)
>        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
>        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
>        at
> java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy.rejectedExecution(ThreadPoolExecutor.java:1737)
>        at
> java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:767)
>        at
> java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:658)
>        at
> java.util.concurrent.AbstractExecutorService.invokeAll(AbstractExecutorService.java:200)
>        at
> in.verse.search.VSearcher$VerticalSearcher.searchInternal(VSearcher.java:542)
>        at
> in.verse.search.VSearcher$VerticalSearcher.searchInternal(VSearcher.java:476)
>        at in.verse.search.VSearcher$VerticalSearcher.search(VSearcher.java:384)
>        at in.verse.search.VSearcher.search(VSearcher.java:187)
>        at
> in.verse.search.impl.SearchQuery.executeSearchQuery(SearchQuery.java:166)
>        at
> in.verse.search.impl.SearchQuery.executeSearchQuery(SearchQuery.java:255)
>        at
> org.apache.jsp.jobs.mobile.airtel.xhtml.search_jsp._jspService(search_jsp.java:869)
>        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
>        at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
>        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
>        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
>        at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>        at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>        at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>        at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
>        at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
>        at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
>        at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>        at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>        at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
>        at
> org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:852)
>        at
> org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:584)
>        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1508)
>        at java.lang.Thread.run(Thread.java:619)
> --
> View this message in context: http://www.nabble.com/Tomcat-Threads-are-BLOCKED-after-some-time-tp22308385p22308385.html
> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>
>
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