Application hangs while trying to create a socket

Hello,
We have a third party application that makes HTTP connections using a old version of HTTPClient. Recently we have run into problems where the application hangs as one thread seems to hang while trying to create a socket (thread dumps show the hang occurs in native code) and other threads end up waiting for this thread as they need to obtain a lock on HTTPClient.HTTPConnection. We found out that HTTPClient was not setting a timeout on the underlying socket (SO_TIMEOUT) and the relevant patch has been implemented in the hope that if the condition arises again the offending thread will be timed out and allow other threads to try and continue.
We will not be able to see if the patch works until Monday and I would like to understand the problem a little better if it fails. My question at what point will the socket timeout starting ticking? As our offending thread is waiting in native code is there a chance that the timeout will not be "active".
Also can anyone provide reasons for an application hanging while trying to create a socket and any suggestions for monitoring or mitigating this problem?
Thanks a lot.
Sun Solaris 5.8
JDK 1.4.1 b02

It looks like our version of the JDK offer a connect method with a timeout value, I think this will do the trick.

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