[ http://issues.apache.org/jira/browse/XALANJ-2321?page=all ]
Brian Minchau resolved XALANJ-2321.
-----------------------------------
Fix Version/s: Latest Development Code
Resolution: Fixed
I just applied the patch that Yash reviewed to the latest development code.
.... done
> Multi-threading problem with AVTs
> ---------------------------------
>
> Key: XALANJ-2321
> URL: http://issues.apache.org/jira/browse/XALANJ-2321
> Project: XalanJ2
> Issue Type: Bug
> Components: Xalan
> Environment: multi-processor systems
> Reporter: Erin Harris
> Fix For: Latest Development Code
>
> Attachments: AVT.patch
>
>
> The following code in AVT.java is causing problems for multi-threaded test
> cases:
> private final FastStringBuffer getBuffer(){
> if(USE_OBJECT_POOL){
> return StringBufferPool.get();
> }else if(m_cachedBuf == null){
> m_cachedBuf = new FastStringBuffer(INIT_BUFFER_CHUNK_BITS);
> return m_cachedBuf;
> }else if(m_cachedBuf.length() != 0){
> return new FastStringBuffer(INIT_BUFFER_CHUNK_BITS);
> }else{
> return m_cachedBuf;
> }
> }
> Because the same object node for the AVT is used by each thread, sometimes on
> one thread the buffer would be empty just as another thread is writing to it
> and thus both threads would write to the same buffer. This caused problems
> for a customer that used <xsl:element name="{local-name()}"> a lot and were
> running on a multi-processor machine.
> The suggested fix is to change the code to the following, and remove the
> m_cachedBuf field:
> private final FastStringBuffer getBuffer(){
> if(USE_OBJECT_POOL){
> return StringBufferPool.get();
> }else{
> return new FastStringBuffer(INIT_BUFFER_CHUNK_BITS);
> }
> }
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