Hello:
The FAQ[1], declares xerces DOM implementation is not thread safe. I
guess this is because of the Deferred DOM implementation.
I have in fact observed runtime exceptions[2] with xerces 2.7, 2.8 when
accessing methods that traverse the DOM concurrently without
synchronization.
Is the xerces DOM implementation still not thread safe even after
setting the Feature
"http://apache.org/xml/features/dom/defer-node-expansion to false ?
I would appreciate if the users on this list shared their experiences of
using xerces DOM in a multi-threaded scenario.
Thanks
-Prashant
[1]: http://xerces.apache.org/xerces2-j/faq-dom.html#faq-1
[2] : Caused by: java.lang.IllegalArgumentException: type: -1
at
org.apache.xerces.dom.DeferredDocumentImpl.getNodeObject(Unknown Source)
at
org.apache.xerces.dom.DeferredDocumentImpl.synchronizeChildren(Unknown
Source)
at
org.apache.xerces.dom.DeferredElementImpl.synchronizeChildren(Unknown
Source)
at
org.apache.xerces.dom.ParentNode.getFirstChild(ParentNode.java:226)
... 11 more
Caused by: java.lang.NullPointerException
at org.apache.xerces.dom.ParentNode.nodeListGetLength(Unknown Source)
at org.apache.xerces.dom.ParentNode.getLength(Unknown Source)
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