"randomly receiving the content of 2 unrelated pages together" smells like some non-threadsafe code to me.
-----Original Message----- From: Gabriel Egolf [mailto:[EMAIL PROTECTED] Sent: Mittwoch, 25. Juni 2003 20:48 To: [EMAIL PROTECTED] Subject: Random ArrayIndexOutOfBoundsException Hello all. I'm in the last stages of development on a rather large project, and for some time now have been plagued by a rather annoying problem. I'm not sure even how the problem began, but I'll try to give as much information as possible and hopefully one of you has run across it in the past. Generally, the problem manifests itself as a blank page containing nothing but the XML PI (<?xml version="1.0" encoding="utf-8"?>). Occasionally, I'll get the contents of 2 unrelated pages together. Unfortunately, this problem seems to be a completely random occurence, and usually a server restart will solve it temporarily. Here's my software environment: JDK 1.4.1_02 Jetty 4.2.9 Cocoon 2.0.4 I've supplied an error trace from my error.log at the end of this message. If you've seen this before, please let me know how you fixed it. Thanks. Gabriel Egolf Developer Bob Jones University [EMAIL PROTECTED] ERROR (2003-06-25) 14:24.36:802 [access] (/giving/index) PoolThread-9/CocoonServlet: Problem with Cocoon servlet 11535 org.apache.cocoon.ProcessingException: Exception during processing of cocoon://giving/index.html: java.lang.ArrayIndexOutOfBoundsException: -3 11536 at org.apache.cocoon.components.source.SitemapSource.toSAX(SitemapSource.java:3 93) 11537 at org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:143) 11538 at org.apache.cocoon.components.pipeline.CachingEventPipeline.process(CachingEv entPipeline.java:250) 11539 at org.apache.cocoon.components.pipeline.CachingStreamPipeline.process(CachingS treamPipeline.java:395) 11540 at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(Seri alizeNode.java:154) 11541 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:85) 11542 at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTyp eNode.java:158) 11543 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:85) 11544 at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invok e(PreparableMatchNode.java:166) 11545 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11546 at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel ineNode.java:151) 11547 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11548 at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe linesNode.java:145) 11549 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:332) 11550 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:293) 11551 at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNod e.java:124) 11552 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11553 at org.apache.cocoon.components.treeprocessor.sitemap.SelectNode.invoke(SelectN ode.java:140) 11554 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11555 at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel ineNode.java:151) 11556 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11557 at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe linesNode.java:145) 11558 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:332) 11559 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:293) 11560 at org.apache.cocoon.Cocoon.process(Cocoon.java:579) 11561 at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1043) 11562 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) 11563 at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:360) 11564 at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandl er.java:294) 11565 at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:558) 11566 at org.mortbay.http.HttpContext.handle(HttpContext.java:1714) 11567 at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext .java:507) 11568 at org.mortbay.http.HttpContext.handle(HttpContext.java:1664) 11569 at org.mortbay.http.HttpServer.service(HttpServer.java:863) 11570 at org.mortbay.http.HttpConnection.service(HttpConnection.java:775) 11571 at org.mortbay.http.ajp.AJP13Connection.handleNext(AJP13Connection.java:252) 11572 at org.mortbay.http.HttpConnection.handle(HttpConnection.java:792) 11573 at org.mortbay.http.ajp.AJP13Listener.handleConnection(AJP13Listener.java:204) 11574 at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289) 11575 at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:455) 11576 Caused by: java.lang.ArrayIndexOutOfBoundsException: -3 11577 at org.apache.xml.utils.IntStack.pop(IntStack.java:127) 11578 at org.apache.xml.dtm.ref.sax2dtm.SAX2DTM.endElement(SAX2DTM.java:1889) 11579 at org.apache.xml.dtm.ref.IncrementalSAXSource_Filter.endElement(IncrementalSAX Source_Filter.java:287) 11580 at org.apache.xalan.transformer.TransformerHandlerImpl.endElement(TransformerHa ndlerImpl.java:552) 11581 at org.apache.cocoon.xml.AbstractXMLPipe.endElement(AbstractXMLPipe.java:147) 11582 at org.apache.cocoon.sitemap.ContentAggregator.endElem(ContentAggregator.java:3 29) 11583 at org.apache.cocoon.sitemap.ContentAggregator.generate(ContentAggregator.java: 156) 11584 at org.apache.cocoon.components.pipeline.CachingEventPipeline.process(CachingEv entPipeline.java:250) 11585 at org.apache.cocoon.components.source.SitemapSource.toSAX(SitemapSource.java:3 81) 11586 ... 39 more 11587 java.lang.ArrayIndexOutOfBoundsException: -3 11588 at org.apache.xml.utils.IntStack.pop(IntStack.java:127) 11589 at org.apache.xml.dtm.ref.sax2dtm.SAX2DTM.endElement(SAX2DTM.java:1889) 11590 at org.apache.xml.dtm.ref.IncrementalSAXSource_Filter.endElement(IncrementalSAX Source_Filter.java:287) 11591 at org.apache.xalan.transformer.TransformerHandlerImpl.endElement(TransformerHa ndlerImpl.java:552) 11592 at org.apache.cocoon.xml.AbstractXMLPipe.endElement(AbstractXMLPipe.java:147) 11593 at org.apache.cocoon.sitemap.ContentAggregator.endElem(ContentAggregator.java:3 29) 11594 at org.apache.cocoon.sitemap.ContentAggregator.generate(ContentAggregator.java: 156) 11595 at org.apache.cocoon.components.pipeline.CachingEventPipeline.process(CachingEv entPipeline.java:250) 11596 at org.apache.cocoon.components.source.SitemapSource.toSAX(SitemapSource.java:3 81) 11597 at org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:143) 11598 at org.apache.cocoon.components.pipeline.CachingEventPipeline.process(CachingEv entPipeline.java:250) 11599 at org.apache.cocoon.components.pipeline.CachingStreamPipeline.process(CachingS treamPipeline.java:395) 11600 at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(Seri alizeNode.java:154) 11601 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:85) 11602 at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTyp eNode.java:158) 11603 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:85) 11604 at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invok e(PreparableMatchNode.java:166) 11605 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11606 at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel ineNode.java:151) 11607 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11608 at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe linesNode.java:145) 11609 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:332) 11610 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:293) 11611 at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNod e.java:124) 11612 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11613 at org.apache.cocoon.components.treeprocessor.sitemap.SelectNode.invoke(SelectN ode.java:140) 11614 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11615 at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel ineNode.java:151) 11616 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11617 at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe linesNode.java:145) 11618 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:332) 11619 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:293) 11620 at org.apache.cocoon.Cocoon.process(Cocoon.java:579) 11621 at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1043) 11622 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) 11623 at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:360) 11624 at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandl er.java:294) 11625 at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:558) 11626 at org.mortbay.http.HttpContext.handle(HttpContext.java:1714) 11627 at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext .java:507) 11628 at org.mortbay.http.HttpContext.handle(HttpContext.java:1664) 11629 at org.mortbay.http.HttpServer.service(HttpServer.java:863) 11630 at org.mortbay.http.HttpConnection.service(HttpConnection.java:775) 11631 at org.mortbay.http.ajp.AJP13Connection.handleNext(AJP13Connection.java:252) 11632 at org.mortbay.http.HttpConnection.handle(HttpConnection.java:792) 11633 at org.mortbay.http.ajp.AJP13Listener.handleConnection(AJP13Listener.java:204) 11634 at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289) 11635 at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:455) 11636 java.lang.ArrayIndexOutOfBoundsException: -3 11637 at org.apache.xml.utils.IntStack.pop(IntStack.java:127) 11638 at org.apache.xml.dtm.ref.sax2dtm.SAX2DTM.endElement(SAX2DTM.java:1889) 11639 at org.apache.xml.dtm.ref.IncrementalSAXSource_Filter.endElement(IncrementalSAX Source_Filter.java:287) 11640 at org.apache.xalan.transformer.TransformerHandlerImpl.endElement(TransformerHa ndlerImpl.java:552) 11641 at org.apache.cocoon.xml.AbstractXMLPipe.endElement(AbstractXMLPipe.java:147) 11642 at org.apache.cocoon.sitemap.ContentAggregator.endElem(ContentAggregator.java:3 29) 11643 at org.apache.cocoon.sitemap.ContentAggregator.generate(ContentAggregator.java: 156) 11644 at org.apache.cocoon.components.pipeline.CachingEventPipeline.process(CachingEv entPipeline.java:250) 11645 at org.apache.cocoon.components.source.SitemapSource.toSAX(SitemapSource.java:3 81) 11646 at org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:143) 11647 at org.apache.cocoon.components.pipeline.CachingEventPipeline.process(CachingEv entPipeline.java:250) 11648 at org.apache.cocoon.components.pipeline.CachingStreamPipeline.process(CachingS treamPipeline.java:395) 11649 at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(Seri alizeNode.java:154) 11650 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:85) 11651 at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTyp eNode.java:158) 11652 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:85) 11653 at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invok e(PreparableMatchNode.java:166) 11654 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11655 at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel ineNode.java:151) 11656 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11657 at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe linesNode.java:145) 11658 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:332) 11659 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:293) 11660 at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNod e.java:124) 11661 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11662 at org.apache.cocoon.components.treeprocessor.sitemap.SelectNode.invoke(SelectN ode.java:140) 11663 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11664 at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(Pipel ineNode.java:151) 11665 at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invo keNodes(AbstractParentProcessingNode.java:109) 11666 at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(Pipe linesNode.java:145) 11667 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:332) 11668 at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcess or.java:293) 11669 at org.apache.cocoon.Cocoon.process(Cocoon.java:579) 11670 at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1043) 11671 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) 11672 at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:360) 11673 at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandl er.java:294) 11674 at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:558) 11675 at org.mortbay.http.HttpContext.handle(HttpContext.java:1714) 11676 at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext .java:507) 11677 at org.mortbay.http.HttpContext.handle(HttpContext.java:1664) 11678 at org.mortbay.http.HttpServer.service(HttpServer.java:863) 11679 at org.mortbay.http.HttpConnection.service(HttpConnection.java:775) 11680 at org.mortbay.http.ajp.AJP13Connection.handleNext(AJP13Connection.java:252) 11681 at org.mortbay.http.HttpConnection.handle(HttpConnection.java:792) 11682 at org.mortbay.http.ajp.AJP13Listener.handleConnection(AJP13Listener.java:204) 11683 at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289) 11684 at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:455) 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