Nevermind this...looks like my problem was tagging the "args" as an <str> node instead of an <arr> node. Thanks anyway!
Charlie -----Original Message----- From: Charlie Jackson [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 01, 2007 12:02 PM To: solr-user@lucene.apache.org Subject: NullPointerException (not schema related) Hello, I'm evaluating solr for potential use in an application I'm working on, and it sounds like a really great fit. I'm having trouble getting the Collection Distribution part set up, though. Initially, I had problems setting up the postCommit listener. I first used this xml to configure the listener: <listener event="postCommit" class="solr.RunExecutableListener"> <str name="exe">snapshooter</str> <str name="dir">/usr/local/Production/solr/solr/bin/</str> <bool name="wait">true</bool> </listener> This is what came in the solrconfig.xml file with just a minor tweak to the directory. However, when I committed data to the index, I was getting "No such file or directory" errors from the Runtime.exec call. I verified all of the permissions, etc, with the user I was trying to use. In the end, I wrote up a little test program to see if it was a problem with the Runtime.exec call and I think it is. I'm running this on CentOS 4.4 and Runtime.exec seems to have a hard time directly executing bash scripts. For example, if I called Runtime.exec with a command of "test_program" (which is a bash script), it failed. If I called Runtime.exec with a command of "/bin/bash test_program" it worked. So, with this knowledge in hand, I modified the solrconfig.xml file again to this: <listener event="postCommit" class="solr.RunExecutableListener"> <str name="exe">/bin/bash</str> <str name="dir">/usr/local/Production/solr/solr/bin/</str> <bool name="wait">true</bool> <str name="args"> <str>snapshooter</str> </str> </listener> When I commit data now, however, I get a NullPointerException. I'm including the stack trace here: SEVERE: java.lang.NullPointerException at org.apache.solr.core.SolrCore.update(SolrCore.java:716) at org.apache.solr.servlet.SolrUpdateServlet.doPost(SolrUpdateServlet.java: 53) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:188) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv e.java:210) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv e.java:174) 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:1 51) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:87 0) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc essConnection(Http11BaseProtocol.java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint .java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow erWorkerThread.java:81) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool .java:685) at java.lang.Thread.run(Thread.java:619) I know this has something to do with my config change (the problem goes away if I turn off the postCommit listener) but I don't know what! BTW I'm using solr-1.1.0-incubating. Thanks in advance for any help! Charlie
