[ https://issues.apache.org/jira/browse/SOLR-9414?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Erick Erickson resolved SOLR-9414. ---------------------------------- Resolution: Feedback Received I can't imagine we'd be able to reproduce this 3 major versions later, plus there's not much to go on. If we see this on more recent Solr versions we can open a new issue. > ConcurrentModificationException due to high volume of requests > -------------------------------------------------------------- > > Key: SOLR-9414 > URL: https://issues.apache.org/jira/browse/SOLR-9414 > Project: Solr > Issue Type: Bug > Security Level: Public(Default Security Level. Issues are Public) > Components: search > Affects Versions: 5.2.1 > Environment: CentOS Linux 7 > Reporter: Katherine Mora > Priority: Major > > When having high volume of requests, the logs are filled with this > exception. I have tried to reproduce it by sending queries using JMeter and > it only happens when multiple queries are sent at the same time. I was able > to reproduce it using 1x1, 2x4, 5x2 > {noformat} > null:java.util.ConcurrentModificationException > at > java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:394) > at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:413) > at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:412) > at > org.apache.solr.common.params.ModifiableSolrParams.toString(ModifiableSolrParams.java:201) > at java.lang.String.valueOf(String.java:2849) > at java.lang.StringBuilder.append(StringBuilder.java:128) > at > org.apache.solr.request.SolrQueryRequestBase.toString(SolrQueryRequestBase.java:165) > at > org.apache.solr.search.stats.LocalStatsCache.get(LocalStatsCache.java:40) > at > org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:366) > at > org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:255) > at > org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143) > at org.apache.solr.core.SolrCore.execute(SolrCore.java:2064) > at > org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:654) > at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:450) > at > org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:227) > at > org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:196) > at > org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) > at > org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) > at > org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577) > at > org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) > at > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) > at > org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:95) > at > org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1129) > at > org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) > at > org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) > at > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) > at > org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215) > at > org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110) > at > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) > at org.eclipse.jetty.server.Server.handle(Server.java:497) > at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310) > at > org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) > at > org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540) > at > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) > at > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) > at java.lang.Thread.run(Thread.java:745) > {noformat} -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org