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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=15320 DTMManager.getDTM(int) sometimes returns null for RTF Summary: DTMManager.getDTM(int) sometimes returns null for RTF Product: XalanJ2 Version: CurrentCVS Platform: All OS/Version: Windows NT/2K Status: NEW Severity: Normal Priority: Other Component: Xalan AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] I saw a NullPointerException in the testcase extensions\library\libraryNodeset03.xsl when propagating the extension changes to Xalan3. The weird thing is that this problem has nothing to do with the changes I made. It is also intermittent. I can reproduce it on the command line. But the problem disappeared when running inside the debugger. Adding another unrelated command line option can also cause the problem to disappear. I finally traced the problem down to org.apache.xpath.objects.XRTreeFrag.finalize(), which calls the destruct() method to release the DTM associated with the RTF. The problem is the DTM can still be referenced after it is released, causing DTMManager.getDTM(int nodeHandle) to return NULL. The finalize() method is called by GC, which explains the undeterministic behavior of this bug. I think the main branch also has this problem although I only saw it in the xslt20 branch.
