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ext2xhb · Posted: Sun Jun 27, 2010 7:07 pm Post subject: deadlock bug of MQ?

Hi:
if I create a new thread and in the thread to create QCF and using the QCF to create connection. the createConnection() operation will blocked.
there is no any other concurrent operation on MQ, just createConnection in a new thread, so why to deadlock?
Is it a MQ's bugs?

By the way, I have notice some other confusing things about the "deadlocked" operation;
case 1)If I first create a JMS connection in the main thread; then in the new-created-thread to create a new QCF and a new Connection, they will never deadlock;
case 2) :beside the case 1), I find another way to unlock the deadlock, that's if I create two threads, the threads both create it's own QCF and connection. the first thread will blocked on createConnection, but when the second thread executing createConnection, the first thread's deadlock will be un-locked, then both threads can create their own connection successfully.
Why? is it a MQ's bug? and Is there a fix to resolve the bug?

I am using MQ6.0.2.9 on windows XP sp3. and the JMS program and MQ Server both run in the same machine. and the JMS client 's transport to MQ Server is using "BIND";