No, I was just thoroughly confused.

What's the exit status of the server (server.pl ; echo $?)? ( According to almut below, this would have indicated the server died from SIGPIPE. Have a problem? Check for errors! )

Is there a parent-child relationship between the server and the clients?

The fact that the same socket is being used by multiple threads is odd...

In reply to Re^3: Is this a bug of perl threads? by ikegami
in thread SOLVED: Is this a bug of perl threads? by Ray.Zachary

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