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https://issues.apache.org/jira/browse/SOLR-7435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Joel Bernstein updated SOLR-7435:
---------------------------------
Fix Version/s: (was: 5.2)
5.4
> NPE can occur if CollapsingQParserPlugin is used two or more times in the
> same query
> ------------------------------------------------------------------------------------
>
> Key: SOLR-7435
> URL: https://issues.apache.org/jira/browse/SOLR-7435
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.8.1, 4.9.1, 4.10.1, 4.10.3, 4.10.4, 5.1, 5.2, 5.2.1,
> 5.3
> Reporter: Markus Jelsma
> Priority: Minor
> Fix For: 5.4
>
>
> The problem is that Solr 4.10.3,
> CollapsingFieldValueCollector.finish(CollapsingQParserPlugin.java:632) is
> looking ahead to the next segment. When you use the CollapsingQParser only
> once that look-ahead is always populated because each segment is processed by
> the scorers. The CollapsingQParser plugin does not process every segment
> though, it stops when it runs out of documents that have been collected. So
> the look-ahead can cause a null pointer in the second Collapse. This is a
> problem in every version of the CollapsingQParserPlugin.
> Below is the original description from Markus which is another NPE during a
> look-ahead in Solr 5.1:
> Not even sure it would work anyway, i tried to collapse on two distinct
> fields, ending up with this:
> select?q=*:*&fq={!collapse field=qst}&fq={!collapse field=rdst}
> {code}
> 584550 [qtp1121454968-20] ERROR org.apache.solr.servlet.SolrDispatchFilter [
> suggests] – null:java.lang.NullPointerException
> at
> org.apache.solr.search.CollapsingQParserPlugin$IntScoreCollector.finish(CollapsingQParserPlugin.java:743)
> at
> org.apache.solr.search.CollapsingQParserPlugin$IntScoreCollector.finish(CollapsingQParserPlugin.java:780)
> at
> org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:203)
> at
> org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1660)
> at
> org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1479)
> at
> org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:556)
> at
> org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:518)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:222)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:1984)
> at
> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:829)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:446)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:220)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
> at
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
> at org.eclipse.jetty.server.Server.handle(Server.java:368)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)
> at
> org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)
> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
> at
> org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
> at
> org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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