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From "shou aoki (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-3790) NullPointerException and ConcurrentModificationException thrown when searching with highlighter
Date Wed, 05 Sep 2012 08:39:07 GMT
shou aoki created SOLR-3790:
-------------------------------

             Summary: NullPointerException and ConcurrentModificationException thrown when
searching with highlighter
                 Key: SOLR-3790
                 URL: https://issues.apache.org/jira/browse/SOLR-3790
             Project: Solr
          Issue Type: Bug
          Components: highlighter
    Affects Versions: 3.5
         Environment: Ubuntu 12.04, Solr 3.5
            Reporter: shou aoki


Hi, Im using Solr 3.5.

I found strange phenomenon in solr log.
This phenomenon has two exceptions that NullPointerException and ConcurrentModificationException.
These exceptions are thrown by discrete threads.

I think, The same two queries thrown at same time because error log recorded at same time.
But I can't reproduce it.
Does anyone have the same phenomenon?


{code}
2012-08-21 00:07:49,868 [qtp979682126-953] ERROR SolrCore - java.util.ConcurrentModificationException
        at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:778)
        at java.util.LinkedList$ListItr.next(LinkedList.java:713)
        at org.apache.solr.highlight.SolrHighlighter.getHighlightFields(SolrHighlighter.java:106)
        at org.apache.solr.util.SolrPluginUtils.optimizePreFetchDocs(SolrPluginUtils.java:259)
        at org.apache.solr.handler.component.QueryComponent.doPrefetch(QueryComponent.java:478)
        at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:385)
        at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:194)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1372)
        at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:356)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:252)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1337)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:973)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:417)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:907)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
        at org.eclipse.jetty.server.Server.handle(Server.java:350)
        at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:442)
        at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:941)
        at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:801)
        at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:224)
        at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
        at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
        at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
        at java.lang.Thread.run(Thread.java:679)

2012-08-21 00:07:49,868 [qtp979682126-938] ERROR SolrCore - java.lang.NullPointerException
        at org.apache.solr.highlight.SolrHighlighter.getHighlightFields(SolrHighlighter.java:107)
        at org.apache.solr.util.SolrPluginUtils.optimizePreFetchDocs(SolrPluginUtils.java:259)
        at org.apache.solr.handler.component.QueryComponent.doPrefetch(QueryComponent.java:478)
        at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:385)
        at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:194)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1372)
        at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:356)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:252)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1337)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:973)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:417)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:907)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
        at org.eclipse.jetty.server.Server.handle(Server.java:350)
        at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:442)
        at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:941)
        at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:801)
        at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:224)
        at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
        at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
        at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
        at java.lang.Thread.run(Thread.java:679)
{code}

This is rarely accident? These are discrete bug?


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