DO NOT REPLY [Bug 41508] New: - Thread hang at image loading

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http://issues.apache.org/bugzilla/show_bug.cgi?id=41508

           Summary: Thread hang at image loading
           Product: Fop
           Version: 0.20.4
          Platform: HP
        OS/Version: HP-UX
            Status: NEW
          Severity: major
          Priority: P2
         Component: images
        AssignedTo: fop-dev@xmlgraphics.apache.org
        ReportedBy: [EMAIL PROTECTED]


Hello,
we are running on Weblogic 8.1 and using FOP for rendering report PDF's with
images. It works fine, but sometimes (till now 2x) it happens that all threads
in  WLS are blocked at the same place - when rendering PDF and loading some
image. Threads never get awaked, restart of WLS is needed. I attach piece of
thread dump. All threads have the same stacktrace as seen bellow.
Vasek Tregner

"ExecuteThread: '19' for queue: 'weblogic.kernel.Default'" daemon prio=8
tid=000b1980 nid=52 lwp_id=1404872 waiting on condition [0x12a89000
..0x12a884f0]
        at java.lang.Thread.sleep(Native Method)
        at org.apache.fop.image.GifImage.loadImage(Unknown Source)
        at org.apache.fop.image.AbstractFopImage.getBitmaps(Unknown Source)
        at org.apache.fop.pdf.PDFXObject.output(Unknown Source)
        at org.apache.fop.pdf.PDFDocument.output(Unknown Source)
        at org.apache.fop.render.pdf.PDFRenderer.render(Unknown Source)
        at org.apache.fop.apps.StreamRenderer.queuePage(Unknown Source)
        - locked <4f570c80> (a org.apache.fop.apps.StreamRenderer)
        at org.apache.fop.layout.AreaTree.addPage(Unknown Source)
        at org.apache.fop.fo.pagination.PageSequence.format(Unknown Source)
        at org.apache.fop.apps.StreamRenderer.render(Unknown Source)
        at org.apache.fop.fo.FOTreeBuilder.endElement(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown 
Source)
        at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
        at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)
        at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
        at org.apache.fop.apps.Driver.render(Unknown Source)
        - locked <4f570fd8> (a org.apache.fop.apps.Driver)
        at org.apache.fop.apps.Driver.run(Unknown Source)
        - locked <4f570fd8> (a org.apache.fop.apps.Driver)
        at 
cz.csas.cicnet.tapestry.services.PdfService.service(PdfService.java:75)

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