[ http://nagoya.apache.org/jira/browse/XALANJ-1683?page=history ]
Henry Zongaro reopened XALANJ-1683:
-----------------------------------
Assign To: (was: Xalan Developers Mailing List)
Reopening, as Jira doesn't have a "REMIND" resolution type.
> NPE in XNodeSet.getStringFromNode under heavy load.
> ---------------------------------------------------
>
> Key: XALANJ-1683
> URL: http://nagoya.apache.org/jira/browse/XALANJ-1683
> Project: XalanJ2
> Type: Bug
> Components: XPath
> Versions: 2.5
> Environment: Operating System: Windows NT/2K
> Platform: Other
> Reporter: Noel Grandin
>
> I'm load testing an application that serves up some pages using XSL.
> I'm caching the template objects, and creating a new Transformer
> for each HTTP request.
> JDK 1.3.1-b24
> Xalan 2.5.1
> Xerces 2.5.0
> Tomcat 3.3.1a
> Under very heavy load (100+ concurrent users), I get the following stack
> trace:
> javax.xml.transform.TransformerException: Unknown error in XPath. PublicId:
> null SystemId: null ColumnNo: 0 LineNo: 0 MCQ
> java.lang.NullPointerException
> at org.apache.xpath.objects.XNodeSet.getStringFromNode
> (XNodeSet.java:247)
> at org.apache.xpath.objects.XNodeSet.str(XNodeSet.java:310)
> at org.apache.xpath.objects.XRTreeFragSelectWrapper.execute
> (XRTreeFragSelectWrapper.java:110)
> at org.apache.xpath.XPath.execute(XPath.java:306)
> at org.apache.xalan.templates.ElemVariable.getValue
> (ElemVariable.java:316)
> at org.apache.xalan.templates.ElemVariable.execute
> (ElemVariable.java:284)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemTemplate.execute
> (ElemTemplate.java:431)
> at org.apache.xalan.templates.ElemCallTemplate.execute
> (ElemCallTemplate.java:281)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:165)
> at org.apache.xalan.templates.ElemForEach.transformSelectedNodes
> (ElemForEach.java:423)
> at
> org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:284)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:178)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemTemplate.execute
> (ElemTemplate.java:431)
> at org.apache.xalan.templates.ElemCallTemplate.execute
> (ElemCallTemplate.java:281)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:699)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:699)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:699)
> at
> org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes
> (ElemApplyTemplates.java:425)
> at org.apache.xalan.templates.ElemApplyTemplates.execute
> (ElemApplyTemplates.java:215)
> at org.apache.xalan.templates.ElemForEach.transformSelectedNodes
> (ElemForEach.java:423)
> at
> org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:284)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemTemplate.execute
> (ElemTemplate.java:431)
> at org.apache.xalan.templates.ElemCallTemplate.execute
> (ElemCallTemplate.java:281)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:699)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:699)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:699)
> at
> org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes
> (ElemApplyTemplates.java:425)
> at org.apache.xalan.templates.ElemApplyTemplates.execute
> (ElemApplyTemplates.java:215)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:699)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.templates.ElemLiteralResult.execute
> (ElemLiteralResult.java:699)
> at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates
> (TransformerImpl.java:2318)
> at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode
> (TransformerImpl.java:2185)
> at org.apache.xalan.transformer.TransformerImpl.transformNode
> (TransformerImpl.java:1263)
> at org.apache.xalan.transformer.TransformerImpl.transform
> (TransformerImpl.java:671)
> at org.apache.xalan.transformer.TransformerImpl.transform
> (TransformerImpl.java:1179)
> at org.apache.xalan.transformer.TransformerImpl.transform
> (TransformerImpl.java:1157)
> at exinet.oasys.assessor.content.ContentRenderer.renderContent
> (ContentRenderer.java:99)
> at exinet.oasys.assessor.AssessmentFormMainServlet.doRender
> (AssessmentFormMainServlet.java:54)
> at exinet.oasys.assessor.content.ControllerServlet.controlAction
> (ControllerServlet.java:153)
> at exinet.oasys.assessor.content.ControllerServlet.service
> (ControllerServlet.java:91)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java)
> at org.apache.tomcat.facade.ServletHandler.doService
> (ServletHandler.java:574)
> at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
> at org.apache.tomcat.core.Handler.service(Handler.java:235)
> at org.apache.tomcat.facade.ServletHandler.service
> (ServletHandler.java:485)
> at org.apache.tomcat.core.ContextManager.internalService
> (ContextManager.java:917)
> at org.apache.tomcat.core.ContextManager.service
> (ContextManager.java:833)
> at
> org.apache.tomcat.modules.server.Http10Interceptor.processConnection
> (Http10Interceptor.java:176)
> at org.apache.tomcat.util.net.TcpWorkerThread.runIt
> (PoolTcpEndpoint.java:494)
> at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
> (ThreadPool.java:516)
> at java.lang.Thread.run(Thread.java:484)
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