Hi all,
I am using Solr 3.6.1 version. I am giving a set of requests to solr simultaneously. When I check the log file, I noticed the below exception stack trace SEVERE: java.util.ConcurrentModificationException at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:761) at java.util.LinkedList$ListItr.next(LinkedList.java:696) at org.apache.solr.highlight.SolrHighlighter.getHighlightFields(SolrHighlighter.java:106) at org.apache.solr.highlight.DefaultSolrHighlighter.doHighlighting(DefaultSolrHighlighter.java:369) at org.apache.solr.handler.component.HighlightComponent.process(HighlightComponent.java:131) at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:186) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1376) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:365) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:260) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) When I searched through the solr issues, I got the following two url's, https://issues.apache.org/jira/browse/SOLR-2684 https://issues.apache.org/jira/browse/SOLR-3790 The stack trace given in the second url coincides with the one given above so I have applied the code change as given in the below link http://svn.apache.org/viewvc/lucene/dev/trunk/solr/core/src/java/org/apache/solr/search/SolrIndexSearcher.java?r1=1229401&r2=1231606&diff_format=h The first url's stack trace seems to be different. I have two questions here. 1.) Please tell me why this exception stack trace occurs 2.) IS there any other patch/solution available to overcome this exception. Please guide me. Thanks -- View this message in context: http://lucene.472066.n3.nabble.com/ConcurrentModificationException-in-Solr-3-6-1-tp4034520.html Sent from the Solr - User mailing list archive at Nabble.com.