Re: [jetty-discuss] Null Pointer

[Greg W. <gr...@mo...>]

Tony Thompson wrote:
> I have seen this pop up on occasion with 4.2.15rc0.
> 
> java.lang.NullPointerException
> 	at
> org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:494)
> 
> Any idea why?

It is another of those wierd memory boundary issues!  A member
variable is manipulated within sync blocks but used outside of
a sync block.    On some SMP machines, this means that out-of-order
updates may be seen!

I think this was only exposed by the fix that was done for 15rc0
for a similar problem on the job variable.

I fix is going in now.

cheers