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From andy <yhl...@sohu.com>
Subject solr instance keep increasing thread count
Date Tue, 04 Dec 2018 07:58:20 GMT
we use solrcloud with version 5.2.1,openjdk 1.8,we have multiple solr
machines, one of them keep increasing thread count ,I saw from
http://xxxxxx:xxx/solr/#/~threads page, I found that a lot of
[java.util.concurrent.locks.ReentrantReadWriteLock$FairSync@xxxxx] threads,
the detail info like this:

sun.misc.Unsafe.park​(Native Method)
java.util.concurrent.locks.LockSupport.park​(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt​(AbstractQueuedSynchronizer.java:836)
java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared​(AbstractQueuedSynchronizer.java:967)
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared​(AbstractQueuedSynchronizer.java:1283)
java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock​(ReentrantReadWriteLock.java:727)
org.apache.solr.update.VersionInfo.lockForUpdate​(VersionInfo.java:110)
org.apache.solr.update.processor.DistributedUpdateProcessor.doLocalCommit​(DistributedUpdateProcessor.java:1630)
org.apache.solr.update.processor.DistributedUpdateProcessor.processCommit​(DistributedUpdateProcessor.java:1612)
org.apache.solr.update.processor.LogUpdateProcessor.processCommit​(LogUpdateProcessorFactory.java:161)
org.apache.solr.handler.RequestHandlerUtils.handleCommit​(RequestHandlerUtils.java:69)
org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody​(ContentStreamHandlerBase.java:68)
org.apache.solr.handler.RequestHandlerBase.handleRequest​(RequestHandlerBase.java:143)
org.apache.solr.core.SolrCore.execute​(SolrCore.java:2064)
org.apache.solr.servlet.HttpSolrCall.execute​(HttpSolrCall.java:654)
org.apache.solr.servlet.HttpSolrCall.call​(HttpSolrCall.java:450)
org.apache.solr.servlet.SolrDispatchFilter.doFilter​(SolrDispatchFilter.java:227)
org.apache.solr.servlet.SolrDispatchFilter.doFilter​(SolrDispatchFilter.java:196)
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter​(ServletHandler.java:1652)
org.eclipse.jetty.servlet.ServletHandler.doHandle​(ServletHandler.java:585)
org.eclipse.jetty.server.handler.ScopedHandler.handle​(ScopedHandler.java:143)
org.eclipse.jetty.security.SecurityHandler.handle​(SecurityHandler.java:577)
org.eclipse.jetty.server.session.SessionHandler.doHandle​(SessionHandler.java:223)
org.eclipse.jetty.server.handler.ContextHandler.doHandle​(ContextHandler.java:1127)
org.eclipse.jetty.servlet.ServletHandler.doScope​(ServletHandler.java:515)
org.eclipse.jetty.server.session.SessionHandler.doScope​(SessionHandler.java:185)
org.eclipse.jetty.server.handler.ContextHandler.doScope​(ContextHandler.java:1061)
org.eclipse.jetty.server.handler.ScopedHandler.handle​(ScopedHandler.java:141)
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle​(ContextHandlerCollection.java:215)
org.eclipse.jetty.server.handler.HandlerCollection.handle​(HandlerCollection.java:110)
org.eclipse.jetty.server.handler.HandlerWrapper.handle​(HandlerWrapper.java:97)
org.eclipse.jetty.server.Server.handle​(Server.java:497)
org.eclipse.jetty.server.HttpChannel.handle​(HttpChannel.java:310)
org.eclipse.jetty.server.HttpConnection.onFillable​(HttpConnection.java:257)
org.eclipse.jetty.io.AbstractConnection$2.run​(AbstractConnection.java:540)
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob​(QueuedThreadPool.java:635)
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run​(QueuedThreadPool.java:555)
java.lang.Thread.run​(Thread.java:745)


anyone know the  probably reson for this?




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