Any idea ?

[Bhavin Pandya]

Hi,

I am getting this exception sometimes while searching.. .Any idea what could be 
problem ?

java.lang.NullPointerException
        at 
org.apache.lucene.search.MultiSearcherThread.hits(ParallelMultiSearcher.java:286)
        at 
org.apache.lucene.search.ParallelMultiSearcher.search(ParallelMultiSearcher.java:87)
        at org.apache.lucene.search.Hits.getMoreDocs(Hits.java:65)
        at org.apache.lucene.search.Hits.<init>(Hits.java:44)
        at org.apache.lucene.search.Searcher.search(Searcher.java:44)
        at org.apache.lucene.search.Searcher.search(Searcher.java:36)
        at _searcher__jsp._jspService(_searcher__jsp.java:185)
        at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
        at com.caucho.jsp.Page.subservice(Page.java:506)
        at 
com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
        at com.caucho.server.http.Invocation.service(Invocation.java:315)
        at 
com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
        at 
com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:346)
        at 
com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:274)
        at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
        at java.lang.Thread.run(Thread.java:534)

I am using lucene 1.9 and j2sdk1.4.2_05.

Thanks.
Bhavin pandya