You could try running  xindice command line tool like this to export the 
data and then reload it.

$XINDICE_HOME/bin/xindice export -c  xmldb:xindice://localhost:8080/db/ -n test 
-f test

Maybe I can work with you to narrow down where this null pointer is coming 
from. Are you using the latest release?

Todd


On Fri, 12 May 2006, Rohit Mathur wrote:

> Hi,
> 
> Is there any utility out there that can recover the data from a collection.
> 
> Is it at all possible to do this at all?
> 
> One particular collection has "gone bad". The rest of the db is working 
> great.
> I am unable to query it or create a collection within it.
> 
> I get a null pointer exception from the data.
> 
> thanks
> 
> Rohit
> 
> java.lang.NullPointerException at 
> org.apache.xindice.core.filer.BTree$BTreeNode.query(BTree.java:937) at 
> org.apache.xindice.core.filer.BTree$BTreeNode.query(BTree.java:937) at 
> org.apache.xindice.core.filer.BTree.query(BTree.java:221) at 
> org.apache.xindice.core.filer.BTreeFiler$BTreeFilerRecordSet.(BTreeFiler.java:191)
>  
> at 
> org.apache.xindice.core.filer.BTreeFiler.getRecordSet(BTreeFiler.java:174) 
> at 
> org.apache.xindice.core.Collection.listDocuments(Collection.java:1007) 
> at 
> org.apache.xindice.server.UglyBrowser.getHierarchy(UglyBrowser.java:157) 
> at org.apache.xindice.server.UglyBrowser.doGet(UglyBrowser.java:78) at 
> org.apache.xindice.server.XindiceServlet.doGet(XindiceServlet.java:82) 
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at 
> javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
>  
> at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
>  
> at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
>  
> at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
>  
> at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) 
> at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) 
> at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>  
> at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
>  
> at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) 
> at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) 
> at 
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415) 
> at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180) 
> at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
>  
> at 
> org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
>  
> at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
>  
> at 
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172) 
> at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
>  
> at 
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:509) 
> at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
>  
> at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) 
> at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) 
> at 
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
>  
> at 
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
>  
> at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480) 
> at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) 
> at 
> org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223) 
> at 
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:432) 
> at 
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
>  
> at 
> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534) 
> at 
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
>  
> at java.lang.Thread.run(Thread.java:534)
> 


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