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我正在尝试在 solr 中索引我的文件，我的 solr 数据约为 15gb。在索引我的文件时，线程锁定导致索引更新时间长达 15 分钟。我找不到锁定的来源，但它似乎是一个死锁。但这里是堆栈跟踪。

 "http-26300-Processor17" daemon prio=10 tid=0x0000000001d56800 nid=0x34d6 waiting on condition [0x00007f860acfb000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00007f865f7b90f8> (a java.util.concurrent.FutureTask$Sync)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:838)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:998)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
    at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:248)
    at java.util.concurrent.FutureTask.get(FutureTask.java:111)
    at org.apache.solr.update.DirectUpdateHandler2.commit(DirectUpdateHandler2.java:439)
    at org.apache.solr.update.processor.RunUpdateProcessor.processCommit(RunUpdateProcessorFactory.java:85)
    at org.apache.solr.handler.RequestHandlerUtils.handleCommit(RequestHandlerUtils.java:107)
    at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:48)
    at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
    at org.apache.solr.core.SolrCore.execute(SolrCore.java:1316)
    at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:338)
    at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
    at java.lang.Thread.run(Thread.java:636)

多线程堆栈跟踪

    "pool-6-thread-1" prio=10 tid=0x00007fe8944ee800 nid=0x6b65 waiting on condition [0x00007fe8925cb000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00007fe8bd4c1900> (a java.util.concurrent.FutureTask$Sync)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:838)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:998)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
    at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:248)
    at java.util.concurrent.FutureTask.get(FutureTask.java:111)
    at org.apache.solr.update.DirectUpdateHandler2.commit(DirectUpdateHandler2.java:439)
    at org.apache.solr.update.DirectUpdateHandler2$CommitTracker.run(DirectUpdateHandler2.java:602)
    - locked <0x00007fe8ad6ed8b0> (a org.apache.solr.update.DirectUpdateHandler2$CommitTracker)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:165)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:636)
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1 回答 1

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可能会有不必要的争用，但如果操作结束，这意味着没有死锁。

查看DirectUpdateHandler2 的代码，看起来这个堆栈是由于您在提交/优化操作后要求搜索者被加热。您应该检查您是否不经常提交/优化（最后一次提交可能就足够了，不再推荐优化）和/或停止等待搜索者在返回之前被加热。

于 2012-04-24T09:40:54.973 回答