[SOLR-9114] NPE using TermVectorComponent, MoreLikeThisComponent in combination with ExactStatsCache

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.0, 6.0, 6.1, 6.2, 6.3, 6.4
• Fix Version/s: 6.5, 7.0
• Assignee: Cao Manh Dat
• Reporter: Andreas Daffner
• Created: 16/May/16 12:20
• Updated: 21/Nov/19 00:42
• Resolved: 23/Jan/17 13:27

Description

Hello,

I am getting a NPE when using the TermVectorComponent in combinition with ExactStatsCache.
I am using SOLR 6.0.0 with 4 shards in total.

This Bug is a duplicate of SOLR-8459
It was already fixed in SOLR-8459 for SOLR 5.x but it is still open in the new SOLR 6.0.0
Can you please fix it for the nes SOLR 6.0.0 as well? I already tried the patch of the 5.x bugfix on the SOLR 6.0.0 but the bug is still present.

I set up my solrconfig.xml as described in these 2 links:
TermVectorComponent:
https://cwiki.apache.org/confluence/display/solr/The+Term+Vector+Component

ExactStatsCache:
https://cwiki.apache.org/confluence/display/solr/Distributed+Requests#Configuring+statsCache+implementation

My snippets from solrconfig.xml:

...
  <!--
    Stats Cache
    https://cwiki.apache.org/confluence/display/solr/Distributed+Requests#Configuring+statsCache+implementation
  -->
  <statsCache class="org.apache.solr.search.stats.ExactStatsCache"/>
  <!-- 
    Term Vector Component
    https://cwiki.apache.org/confluence/display/solr/The+Term+Vector+Component
    -->
  <searchComponent name="tvComponent" class="org.apache.solr.handler.component.TermVectorComponent"/>
  <requestHandler name="/tvrh" class="org.apache.solr.handler.component.SearchHandler">
    <lst name="defaults">
      <bool name="tv">true</bool>
    </lst>
    <arr name="last-components">
      <str>tvComponent</str>
    </arr>
  </requestHandler>
...

Unfortunately a request to SOLR like "http://host/solr/corename/tvrh?q=site_url_id:74" ends up with this NPE:

69730 ERROR (qtp110456297-14) [c:SingleDomainSite_28 s:shard1 r:core_node1 x:SingleDomainSite_28_shard1_replica1] o.a.s.s.HttpSolrCall null:java.lang.NullPointerException
        at org.apache.solr.handler.component.TermVectorComponent.finishStage(TermVectorComponent.java:451)
        at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:426)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:155)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:2033)
        at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:652)
        at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:460)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:229)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:184)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1160)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1092)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
        at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
        at org.eclipse.jetty.server.Server.handle(Server.java:518)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:244)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
        at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
        at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:246)
        at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:156)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
        at java.lang.Thread.run(Thread.java:745)

According to https://issues.apache.org/jira/browse/SOLR-7756 this Bug should be fixed with SOLR 5.3.0, but obviously this NPE is still present.
Can you please help me here?

Issue Links

• is a clone of: SOLR-8459 NPE using TermVectorComponent in combinition with ExactStatsCache