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From "Vincent Cautaerts (JIRA)" <>
Subject [jira] [Created] (SOLR-8115) On query timeout, casting error (...ResultContext cannot be cast to ...SolrDocumentList)
Date Fri, 02 Oct 2015 11:59:26 GMT
Vincent Cautaerts created SOLR-8115:

             Summary: On query timeout, casting error (...ResultContext cannot be cast to
                 Key: SOLR-8115
             Project: Solr
          Issue Type: Bug
          Components: Server
    Affects Versions: 5.3.1
         Environment: Ubuntu 14.04 with Java 1.8.60
            Reporter: Vincent Cautaerts
            Priority: Minor

When making a query, and hitting a timeout, solR throws an error

"org.apache.solr.response.ResultContext cannot be cast to org.apache.solr.common.SolrDocumentList"

This is display in solrJ log files. No mention of a timeout can be seen here.

When searching in server log files, just before that error, I find this message (WARN):

The request took too long to iterate over terms.

It seems that in case of an exception, the value of


is not a SolrDocumentList, but a ResultContext. And therefore the cast at line 297 of SearchHandler
fails, and an erroneous error message (...) is output.

the problem is not the timeout, but the fact that a timeout gives a casting exception, instead
of a timeout exeption. This makes finding the origin of the problem hard (and impossible if
looking only at the logs on the client side).

Note: complete stack trace:

2015-10-02 07:07:49,523 ERROR [qtp1192108080-22][org.apache.solr.common.SolrException] (core.SolrCore:139)
 - java.lang.ClassCastEx
ception: org.apache.solr.response.ResultContext cannot be cast to org.apache.solr.common.SolrDocumentList
        at org.apache.solr.handler.component.SearchHandler.handleRequestBody(
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(
        at org.apache.solr.core.SolrCore.execute(
        at org.apache.solr.servlet.HttpSolrCall.execute(
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(
        at org.eclipse.jetty.servlet.ServletHandler.doScope(
        at org.eclipse.jetty.server.session.SessionHandler.doScope(
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(
        at org.eclipse.jetty.server.handler.HandlerCollection.handle(
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(
        at org.eclipse.jetty.server.Server.handle(
        at org.eclipse.jetty.server.HttpChannel.handle(
        at org.eclipse.jetty.server.HttpConnection.onFillable(
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(
        at org.eclipse.jetty.util.thread.QueuedThreadPool$

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