[SOLR-8459] NPE using TermVectorComponent in combinition with ExactStatsCache

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 5.3
• Assignee: Varun Thacker
• Reporter: Andreas Daffner
• Created: 23/Dec/15 13:33
• Updated: 21/Nov/19 00:42
• Resolved: 18/Jan/17 09:43

Description

Hello,

I am getting a NPE when using the TermVectorComponent in combinition with ExactStatsCache.
I am using SOLR 5.3.0 with 4 shards in total.

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:

4329458 ERROR (qtp59559151-17) [c:SingleDomainSite_11 s:shard1 r:core_node1 x:SingleDomainSite_11_shard1_replica1] o.a.s.c.SolrCore java.lang.NullPointerException
	at org.apache.solr.handler.component.TermVectorComponent.finishStage(TermVectorComponent.java:454)
	at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:416)
	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:210)
	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)

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 cloned by: SOLR-9114 NPE using TermVectorComponent, MoreLikeThisComponent in combination with ExactStatsCache
• is related to: SOLR-8893 Wrong TermVector docfreq calculation with enabled ExactStatsCache
• relates to: SOLR-7756 ExactStatsCache and LRUStatsCache will throw an NPE when a term is not present on a shard