[SOLR-2504] Combined usage of Synonyms/SpellChecker causes java.lang.NullPointerException, when searching for a word out of synonyms.txt

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1
• Component/s: clients - java, spellchecker
• Assignee: Uwe Schindler
• Reporter: Jens Bertheau
• Created: 09/May/11 10:15
• Updated: 11/May/11 11:41
• Resolved: 09/May/11 15:09

Description

After migrating from 1.4 to 3.1 we experience the following behaviour:

When SpellChecking is turned off, everything works fine.
When Synonyms are not being used, everything works fine.

When both, SpellChecking and Synonyms, are being used and a search is triggered, that contains at least one of the words out of synonyms.txt the following error is thrown:

java.lang.NullPointerException
at org.apache.lucene.util.AttributeSource.cloneAttributes(AttributeSource.java:542)
at org.apache.solr.analysis.SynonymFilter.incrementToken(SynonymFilter.java:132)
at org.apache.lucene.analysis.FilteringTokenFilter.incrementToken(FilteringTokenFilter.java:58)
at org.apache.solr.handler.component.SpellCheckComponent.getTokens(SpellCheckComponent.java:485)
at org.apache.solr.handler.component.SpellCheckComponent.process(SpellCheckComponent.java:131)
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:1360)
at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:356)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:252)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)

The problem has been described already here:
http://osdir.com/ml/solr-user.lucene.apache.org/2010-09/msg00945.html

I have a report of a third person, experiencing the same problem.