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From "Vincent Cautaerts (JIRA)" <j...@apache.org>
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
...SolrDocumentList)
                 Key: SOLR-8115
                 URL: https://issues.apache.org/jira/browse/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

rb.rsp.getValues().get("response");

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(SearchHandler.java:297)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:2068)
        at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:669)
        at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:462)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:214)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:179)
        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.ContextHandler.doHandle(ContextHandler.java:1127)
        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:499)
        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)




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