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

[Scott Marlow]

Its close to a one line change, so it doesn't need its own branch (I can 
keep it local until its tested).  I'm writing first because its a pretty 
core change and wanted to see if anyone protests before proceeding down 
this path.

Are you suggesting a branch for other reasons perhaps?  Like pointing 
the automated tests at it and running it into the ground?

Anil Saldhana wrote:
> Why don't you create a branch for your experiments? When the time 
> comes, you can merge.
>
> Scott Marlow wrote:
>> 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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