James Thomas Moughan created XERCESJ-1663:
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Summary: Thread-unsafe lazy initialization in XSAttributeGroupDecl
Key: XERCESJ-1663
URL: https://issues.apache.org/jira/browse/XERCESJ-1663
Project: Xerces2-J
Issue Type: Bug
Components: DOM (Level 3 Core)
Affects Versions: 2.11.0
Reporter: James Thomas Moughan
Attachments: xerces-attribute-group-threadsafety.txt
we have an application that parses a large number of XML files in different
threads using shared schema grammars and a threadsafe gramamar cache. Our
understanding is that this is intended to be threadsafe. Our tests encountered
nondeterministic schema validation failures related to unexpected attributes
and the failures were traced to lazy initialization of the field fAttrUses in
XSAttributeGroupDecl.getAttributeUses.
We've fixed this issue internally and have a patch ready to submit, which I'll
attach to the issue.
If what we're doing isn't intended to be threadsafe (I haven't been able to
find much information on Xerces thread safety) then knowing that would be
useful.
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