[jboss-dev] Object lock contention in JNDI lookup of transaction and proposed change to jndi naming service...

[Scott Marlow]

Dimitris Andreadis wrote:
> Please make sure you work on jboss head, Branch_4_2 is frozen right now.
Now that 4.2 has been released, is 4.2.x a good place to experiment with 
this change?  I haven't been able to build head for a while.

>
> Scott Marlow wrote:
>> Hi,
>>
>> A while back I measured the object lock contention in a JBoss AS 
>> 4.0.4 environment.  I noticed a lot of time spent waiting for the 
>> internal JNDI collection lock.  I think this is worth creating a Jira 
>> for and solving with a swego concurrentHashMap based collection (or 
>> java.util.concurrent when we use java5 as a base).  Of course the 
>> actual contention is app specific but I started thinking about 
>> solving it.
>>
>> Is this worth pursuing?  I'll create a jira and make code changes for 
>> it (I might need some help running the J2EE compatibility tests).  
>> Clearly, we want to pass the unit tests as well (thats an assumed 
>> requirement).
>>
>> Thoughts?
>>
>> Scott
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