Fabrizio Fortino created SOLR-9208:
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Summary: ConcurrentModificationException on SolrCore.close()
resulting in abnormal CPU consumption
Key: SOLR-9208
URL: https://issues.apache.org/jira/browse/SOLR-9208
Project: Solr
Issue Type: Bug
Components: multicore, Server
Affects Versions: 6.0
Reporter: Fabrizio Fortino
In out use case we swap two cores and close the old one. We started seeing the
below error from time to time (it's completely random, we are unable to
reproduce it). Moreover we have noticed that when this Exception is thrown the
CPU consumption goes pretty high (80-100%).
Error Message:
java.util.ConcurrentModificationException:
java.util.ConcurrentModificationException
StackTrace:
java.util.ArrayList$Itr.checkForComodification (ArrayList.java:901)
java.util.ArrayList$Itr.next (ArrayList.java:851)
org.apache.solr.core.SolrCore.close (SolrCore.java:1134)
org.apache.solr.servlet.HttpSolrCall.destroy (HttpSolrCall.java:513)
org.apache.solr.servlet.SolrDispatchFilter.doFilter
(SolrDispatchFilter.java:242)
org.apache.solr.servlet.SolrDispatchFilter.doFilter
(SolrDispatchFilter.java:184)
…ipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668)
org.eclipse.jetty.servlet.ServletHandler.doHandle (ServletHandler.java:581)
org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:143)
org.eclipse.jetty.security.SecurityHandler.handle (SecurityHandler.java:548)
…g.eclipse.jetty.server.session.SessionHandler.doHandle
(SessionHandler.java:226)
…g.eclipse.jetty.server.handler.ContextHandler.doHandle
(ContextHandler.java:1160)
org.eclipse.jetty.servlet.ServletHandler.doScope (ServletHandler.java:511)
org.eclipse.jetty.server.session.SessionHandler.doScope
(SessionHandler.java:185)
org.eclipse.jetty.server.handler.ContextHandler.doScope
(ContextHandler.java:1092)
org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:141)
…e.jetty.server.handler.ContextHandlerCollection.handle
(ContextHandlerCollection.java:213)
….eclipse.jetty.server.handler.HandlerCollection.handle
(HandlerCollection.java:119)
org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:134)
org.eclipse.jetty.server.Server.handle (Server.java:518)
org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:308)
org.eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:244)
…pse.jetty.io.AbstractConnection$ReadCallback.succeeded
(AbstractConnection.java:273)
org.eclipse.jetty.io.FillInterest.fillable (FillInterest.java:95)
org.eclipse.jetty.io.SelectChannelEndPoint$2.run (SelectChannelEndPoint.java:93)
…il.thread.strategy.ExecuteProduceConsume.produceAndRun
(ExecuteProduceConsume.java:246)
…e.jetty.util.thread.strategy.ExecuteProduceConsume.run
(ExecuteProduceConsume.java:156)
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob
(QueuedThreadPool.java:654)
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run (QueuedThreadPool.java:572)
java.lang.Thread.run (Thread.java:745)
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