A thread must reach the end of it's code block OR return, for it to end properly. I would suspect that 
 my $retval = `/usr/bin/snmpget -v1 -c <commstring> $ip sysDescr.0`;

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is hanging, and stoping the flow of the code. Is there someway to set a timeout on it, or wrap it in an eval?

Alarms don't work well in threads, but you could try running a parallel thread to act as a timer, and run the snmpget command thru a piped-open or IPC::Open3 so you get a pid that can be killed when the timer times out.

I'm not really a human, but I play one on earth. Cogito ergo sum a bum

In reply to Re: threads hang by zentara
in thread threads hang by Ryszard

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