NullPointerException in server pages generation (pb with bufferin g?)

[SOBKOWSKI Andrej <An...@axa-im.com>]

Hello All,

 

I'm getting a strange NullPointerException (log reported below). I'm in a
pretty standard configuration that works in other cases:

-          XSP pages generating XML data via ESQL tags

-          XSLT transformation generating Excel-Gnumeric-compatible XML to
be passed on to the HSSF Serializer (POI -> Excel)

-          HSSF Serializer

 

I initially thought there was something in data generated but I tried
separating the steps and everything works fine: if I save the XML generated
by my XSL transformation and I feed it directly to the HSSF serializer,
everything is OK. So it must be something related to the "process" of
generate-transform-serialize.

 

Could it be something related to buffering i.e. somehow the stream generated
isn't flushed or generated soon enough for the next processor?

 

Any suggestions are appreciated. Thank you in advance.

 

Andrej

 

Environment: Windows XP, Welogic 7.0sp2, 512Mb or RAM allocated to the
process

 

Exception log:

java.lang.RuntimeException: java.lang.NullPointerException
        at
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3418)
        at
org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerH
andlerImpl.java:389)
        at
org.apache.cocoon.xml.AbstractXMLPipe.endDocument(AbstractXMLPipe.java:55)
        at
org.apache.cocoon.transformation.TraxTransformer.endDocument(TraxTransformer
.java:562)
        at
org.apache.cocoon.www.reports.master.master_xsp.generate(org.apache.cocoon.w
ww.reports.master.master_xsp:1388)
        at
org.apache.cocoon.generation.ServerPagesGenerator.generate(ServerPagesGenera
tor.java:228)
        at
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLP
ipeline(AbstractProcessingPipeline.java:530)
        at
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline
.processXMLPipeline(AbstractCachingProcessingPipeline.java:172)
        at
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(Abs
tractProcessingPipeline.java:468)
        at
org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(Seri
alizeNode.java:120)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:46)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invok
e(PreparableMatchNode.java:130)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:68)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel
ineNode.java:138)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:68)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe
linesNode.java:89)
        at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(Con
creteTreeProcessor.java:240)
        at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(Con
creteTreeProcessor.java:180)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess
or.java:243)
        at
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNod
e.java:117)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:46)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invok
e(PreparableMatchNode.java:130)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:68)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel
ineNode.java:138)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:68)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe
linesNode.java:89)
        at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(Con
creteTreeProcessor.java:240)
        at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(Con
creteTreeProcessor.java:180)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess
or.java:243)
        at
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNod
e.java:117)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:46)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invok
e(PreparableMatchNode.java:130)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:68)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel
ineNode.java:138)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo
keNodes(AbstractParentProcessingNode.java:68)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe
linesNode.java:89)
        at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(Con
creteTreeProcessor.java:240)
        at
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(Con
creteTreeProcessor.java:180)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess
or.java:243)
        at org.apache.cocoon.Cocoon.process(Cocoon.java:606)
        at
org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1119)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle
tStubImpl.java:1058)
        at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:401)
        at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:306)
        at
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W
ebAppServletContext.java:5445)
        at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:780)
        at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:3105)
        at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2588)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)

 


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