On 9/20/07, Walter Ferrara <[EMAIL PROTECTED]> wrote:
> (I don't know if this is a solr-user or solr-dev matter.)
>
> By uncommenting firstSearcher event in solrconfig.xml in trunk
> (downloaded from hudson  Sept.16), as in:
>
>    <listener event="firstSearcher" class="solr.QuerySenderListener">
>       <arr name="queries">
>         <lst> <str name="q">fast_warm</str> <str name="start">0</str>
> <str name="rows">10</str> </lst>
>       </arr>
>     </listener>
>
> I got this exception:
> 20-set-2007 21.10.14 org.apache.solr.core.SolrCore parseListener
> INFO: Searching for listeners: //[EMAIL PROTECTED]"firstSearcher"]
> java.lang.InstantiationException: org.apache.solr.core.QuerySenderListener
>         at java.lang.Class.newInstance0(Unknown Source)
>         at java.lang.Class.newInstance(Unknown Source)
>         at org.apache.solr.core.Config.newInstance(Config.java:304)
> [...]
>
> This issue is easily reproducible by using the example directory, just
> uncomment firstSearcher and/or newSearcher event in the sorlconfig.xml,
> and launch solr.

Confirmed.
I wonder if this is caused by the recent multi-core refactoring?
It seems like a null pointer exception happens at
    Config config = core.getSolrConfig();
Assuming that this is the cause of the failed instantiation and not a
result of it?

Here's the full stack trace:
INFO: Searching for listeners: //[EMAIL PROTECTED]"firstSearcher"]
java.lang.InstantiationException: org.apache.solr.core.QuerySenderListener
        at java.lang.Class.newInstance0(Class.java:335)
        at java.lang.Class.newInstance(Class.java:303)
        at org.apache.solr.core.Config.newInstance(Config.java:304)
        at org.apache.solr.core.SolrCore.parseListener(SolrCore.java:134)
        at org.apache.solr.core.SolrCore.parseListeners(SolrCore.java:146)
        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:287)
        at org.apache.solr.core.SolrCore.getSolrCore(SolrCore.java:244)
        at 
org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:66)
        at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:99)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at 
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:594)
        at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
        at 
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218)
        at 
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
        at 
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at 
org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:147)
        at 
org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:161)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at 
org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:147)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at 
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117)
        at org.mortbay.jetty.Server.doStart(Server.java:210)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at org.mortbay.xml.XmlConfiguration.main(XmlConfiguration.java:929)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.mortbay.start.Main.invokeMain(Main.java:183)
        at org.mortbay.start.Main.start(Main.java:497)
        at org.mortbay.start.Main.main(Main.java:115)
Sep 20, 2007 5:05:18 PM org.apache.solr.servlet.SolrDispatchFilter init
SEVERE: Could not start SOLR. Check solr/home property
java.lang.NullPointerException
        at 
org.apache.solr.servlet.SolrRequestParsers.<init>(SolrRequestParsers.java:71)
        at 
org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:67)
        at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:99)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at 
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:594)
        at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
        at 
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218)
        at 
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
        at 
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at 
org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:147)
        at 
org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:161)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at 
org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:147)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at 
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117)
        at org.mortbay.jetty.Server.doStart(Server.java:210)
        at 
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at org.mortbay.xml.XmlConfiguration.main(XmlConfiguration.java:929)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.mortbay.start.Main.invokeMain(Main.java:183)
        at org.mortbay.start.Main.start(Main.java:497)
        at org.mortbay.start.Main.main(Main.java:115)


-Yonik

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