[SOLR-8558] Referencing an invalid query parser results in cryptic NPE

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 5.4
• Fix Version/s: 8.2
• Component/s: query parsers
• Assignee: Munendra S N
• Reporter: Shawn Heisey
• Created: 15/Jan/16 22:45
• Updated: 26/Jul/19 08:56
• Resolved: 05/Jul/19 14:27

Description

When an invalid query parser name is used with the defType parameter or in localparams, Solr logs an extremely unhelpful NPE (this stacktrace obtained from the solr-user mailing list):

java.lang.NullPointerException
at org.apache.solr.search.QParser.getParser(QParser.java:315)
at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:159)
at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:254)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:156)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:2073)
at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:658)
at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:457)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:222)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:181)
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)

This should be improved so the user will know what actually went wrong.

Issue Links

• is duplicated by: SOLR-13187 NullPointerException at o.a.solr.search.QParser.getParser