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https://issues.apache.org/jira/browse/XERCESJ-1687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16275823#comment-16275823
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Mukul Gandhi commented on XERCESJ-1687:
---------------------------------------
I've been running your tests from the attached file. I can't understand,
following in your test case:
1) you write
for (int i = 0; i < parallelCount; i++) {
final Thread t = (Thread)threads.get(i);
t.join();
}
I wonder, what purpose t.join() serve? The API doc of Thread.join() says,
"Waits for this thread to die". I suspect, this loop and t.join() is not
required.
2) If I write, final int parallelCount = 1; instead of your final int
parallelCount = 50;
the test case doesn't pass. It should I believe.
I want another committer (or Michael?) to verify whether the code in your test
case is correct.
> XSD 1.1 validation with xs:assert is not thread safe
> ----------------------------------------------------
>
> Key: XERCESJ-1687
> URL: https://issues.apache.org/jira/browse/XERCESJ-1687
> Project: Xerces2-J
> Issue Type: Bug
> Components: JAXP (javax.xml.validation), XML Schema 1.1 Structures
> Affects Versions: 2.12.0
> Environment: java 8 / java 9
> Reporter: Stephan Trebels
> Priority: Critical
> Attachments: parallel-test.zip
>
>
> The XSD 1.1 validation code uses eclipse webtools xpath to validate
> assertions. The PsychoPath XPath 2.0 engine has a bug in
> ResultSequenceFactory, which invalidates correct execution in all parallel
> invocation of XSD 1.1 validation.
> This issue affects completely unrelated schemas and input XML, as long as
> both use assertions. The effect is a lot of spurious assert violations. The
> issue is visible even if only two threads are used in parallel.
> https://bugs.eclipse.org/bugs/show_bug.cgi?id=527812
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