Mailing-List: contact solr-user-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: solr-user@lucene.apache.org
Received-SPF: pass (athena.apache.org: domain of moazzamk@gmail.com designates
 74.125.82.48 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:date:message-id:subject:from:to:content-type;
        b=ibvIO2GTVkqQaOuTdn4xFwMQJlm71e2I9H/3xeqAEdQRc8ssDXmeyQZv5SG7cypkGx
         8J3UOxigsbqD1jOtYdstGmOXDKCKJyM1DrgK1QEv0oxj2+QmpdLh8Q3s6RWvEME2bmDw
         07IjeYIyfDrYGfkkyM7IpMqSgzKao3qwIulNA=
MIME-Version: 1.0
Date: Thu, 2 Sep 2010 08:32:06 -0500
Message-ID: <AANLkTikoGWonwi2+6KO+mxymVCZdcrHEhagfVU2nQsJq@mail.gmail.com>
Subject: Exception in Field Collapsing
From: Moazzam Khan <moazzamk@gmail.com>
To: solr-user@lucene.apache.org
Content-Type: text/plain; charset=ISO-8859-1

Hi Guys,

My index contains 89k documents and I don't store some of the text
fields because they are way too big. When I run a normal search
without field collapsing everything works but when I enable field
collapsing on the same search, it crashes with a 500 error
(exception).

The URL I call is this (for field collapsing):

http://mk.example.com:8080/solr/Advisor/select?indent=on&version=2.2&q=*%3A*&fq=&start=0&rows=999&fl=AdvisorID&qt=standard&wt=standard&explainOther=&collapse.field=AdvisorID&collapse.type=normal&collapse.threshold=1


Below is the exception:


HTTP ERROR 500

Problem accessing /solr/Advisor/select. Reason:

    null

java.lang.NullPointerException
	at org.apache.solr.search.fieldcollapse.NonAdjacentDocumentCollapser$FloatValueFieldComparator.compare(NonAdjacentDocumentCollapser.java:451)
	at org.apache.solr.search.fieldcollapse.NonAdjacentDocumentCollapser$DocumentComparator.compare(NonAdjacentDocumentCollapser.java:263)
	at org.apache.solr.search.fieldcollapse.NonAdjacentDocumentCollapser$DocumentPriorityQueue.lessThan(NonAdjacentDocumentCollapser.java:197)
	at org.apache.lucene.util.PriorityQueue.insertWithOverflow(PriorityQueue.java:148)
	at org.apache.solr.search.fieldcollapse.NonAdjacentDocumentCollapser.doCollapsing(NonAdjacentDocumentCollapser.java:114)
	at org.apache.solr.search.fieldcollapse.AbstractDocumentCollapser.executeCollapse(AbstractDocumentCollapser.java:259)
	at org.apache.solr.search.fieldcollapse.AbstractDocumentCollapser.collapse(AbstractDocumentCollapser.java:179)
	at org.apache.solr.handler.component.CollapseComponent.doProcess(CollapseComponent.java:173)
	at org.apache.solr.handler.component.CollapseComponent.process(CollapseComponent.java:127)
	at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:195)
	at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
	at org.apache.solr.core.SolrCore.execute(SolrCore.java:1322)
	at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:337)
	at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:240)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:326)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
	at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)


Does anyone know why this is happening? Is there any other patch I can
try that will do this same thing without any errors?

Thanks in advance,
Moazzam