[ http://issues.apache.org/jira/browse/XALANJ-1973?page=history ]
Brian Minchau reassigned XALANJ-1973:
-------------------------------------
Assign To: Henry Zongaro
> Memory Leak, Extension functions that return a DTM
> --------------------------------------------------
>
> Key: XALANJ-1973
> URL: http://issues.apache.org/jira/browse/XALANJ-1973
> Project: XalanJ2
> Type: Bug
> Components: transformation
> Versions: CurrentCVS
> Environment: Xalan, current CVS
> JDK 1.4.2_04 (SUN)
> Reporter: John Gentilin
> Assignee: Henry Zongaro
> Attachments: FanTest.xsl, screenshot-1.jpg,
> xsl-apply-templates-backtrace.mht, xsl-apply-templates-heap.mht,
> xsl-for-each-backtrace.mht
>
> It appears that when an extension function returns a DTM, a reference to the
> DTM object is held within the transformation engine.
> This problem is apparent within the SQL Extension but I don't think the
> extension code is the source of the problem.
> I am including a Stylesheet that can demonstrate the problem along with 2
> different back trace files and a heap dump produced from OptimizeIt. The heap
> dump represents the state of the JVM, after the transformation was completed
> with a forced GC. The back traces show the allocations of the SQLDocument
> which extends DTM.
> The stylesheet example is complete and does not require an XML data file. It
> does require a connection to a JDBC compliant Database. The stylesheet will
> create the table, insert the test data and run several iterations.
> At first we were using the xsl:for-each element. Comments in this code lead
> me to believe that the ElemForEach#transformSelectedNodes may have been
> responsible. The XSL was then refactored to use xsl:apply-templates but the
> same memory leak appeared.
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