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https://issues.apache.org/jira/browse/XALANJ-2564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13510995#comment-13510995
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Gary Gregory commented on XALANJ-2564:
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When you say at the same time, do you mean from multiple threads?
> variable value calculated incorrectly within for-each in xsl transformation
> output
> ----------------------------------------------------------------------------------
>
> Key: XALANJ-2564
> URL: https://issues.apache.org/jira/browse/XALANJ-2564
> Project: XalanJ2
> Issue Type: Bug
> Security Level: No security risk; visible to anyone(Ordinary problems in
> Xalan projects. Anybody can view the issue.)
> Affects Versions: 2.7
> Environment: Weblogic 9.2 MP3 on HP-UX Itanium(B.11.31).
> Multi-threaded environment.
> Xalan 7.0.
> Hardware:
> Processors: 4
> architecture: IA64N
> Java: 1.5
> Physical Memory: 32G
> Reporter: Nash
> Assignee: Steven J. Hathaway
> Attachments: Incorrect Transformation.zip
>
>
> We are encountering a strange issue in Production environment which we are
> not able to replicate in any environments. The Order Process & Management
> application which generates this error processes thousands of orders in a day
> avg. 4000 order. The order xmls are transformed using various xslt to update
> order data. There is no XLS transformation exception thrown but the xml
> output is not what is expected which leads to an "OrderUpdateException" being
> thrown by the application API.
> When this exception occurs, there are always 2 orders involved i.e. 2
> different order xmls being transformed at the same time(same timestamp) using
> same xslt. The resulting XML transformation output for both the orders are
> also well-formed but due to incorrect value evaluated by a variable declared
> inside <xsl:for-each, wrong path information is being supplied to <Add
> instruction for updating the order. Morever, the issue seems to go away on
> retry of order task from the application web client. As a result, the orders
> get updated and processing continues. Here retry means applying the same
> transformation again on order xml. The input order xmls were not modified
> whatsoever during retry.
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