[jira] [Commented] (XERCESJ-1687) XSD 1.1 validation with xs:assert is not thread safe

["Mukul Gandhi (JIRA)" <xe...@xml.apache.org>]

    [ https://issues.apache.org/jira/browse/XERCESJ-1687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16272155#comment-16272155 ] 

Mukul Gandhi commented on XERCESJ-1687:
---------------------------------------

I think, muti-threadedness (i.e thread safety) cannot be assumed in the implementation. It should be provided if there's a specific functional requirement.

> 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: XML Schema 1.1 Structures
>    Affects Versions: 2.12.0
>         Environment: java 8 / java 9
>            Reporter: Stephan Trebels
>            Priority: Critical
>
> 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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