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From "Chris Twiner (JIRA)" <>
Subject [jira] Commented: (MUSE-270) EMPTY_DOC thread stability issues
Date Wed, 30 Jan 2008 19:09:34 GMT


Chris Twiner commented on MUSE-270:

I was just given a new dual core laptop at work (core2 Duo, T7500 2.20Ghz).  As such I have
run the tests again against my patched wholeMuseFixed.jar 5 times and it never misses a message
(always 3000).  

With the normal must jars it gets NPE's and over 5 runs (messages out of 3000 sent): 2468,
2549, 2522, 2617 and 2420.  Strangely the gap is much less on this new machine (was 1300-1500
on my other single cpu boxes).

I'm now confident that this fixes the EMPTY_DOC and Xerces NodeList issues.  (Again the NodeList
fix depends on Xerces never breaking nextSibling in an mt environment)

> EMPTY_DOC thread stability issues
> ---------------------------------
>                 Key: MUSE-270
>                 URL:
>             Project: Muse
>          Issue Type: Bug
>          Components: Utilities - General, QName, and XML, WS-Addressing and SOAP
>    Affects Versions: 2.0.0 M1, 2.0.0 M2, 2.0.0, 2.1.0, 2.2.0, 2.3.0
>         Environment: Impacts all platforms and configurations
>            Reporter: Rich Lucente
>            Assignee: Dan Jemiolo
>             Fix For: 2.3.0
>         Attachments:,,
> This bug is being opened to track the EMPTY_DOC thread stability issue currently being
discussed on the muse-dev mailing list.  XmlUtils provides EMPTY_DOC as a scratchpad instance
of a DOM Document for creation of elements.  This has been shown to cause exceptions in a
multi-threaded environment.  The issue is compounded by the widespread use of EMPTY_DOC in
the code due to its convenience and the reduction in object creation when constructing XML

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