Threads and sockets

is "B" a back ground thread? That is, every thread has a property "isBackGroundThread" if it is set to true, then the thread will terminate when the parent terminates. Also, is thread "A" the application thread, or just some additional thread you created? It shouldn't matter, but there is a chance that if your application thread terminates before your other threads then you may have some conflicts. Also, one last thing to check is to see if "B" uses any objects or properties that are made available by thread "A" directly? Maybe instead of putting Thread "A" to sleep, just have it join Thread "B"