Vincent Cautaerts created SOLR-8115:
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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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