On Aug 6, 2019, at 1:54 PM, Tony Garnock-Jones wrote:

> How can a UDP socket survive process exit?
> 

I don't knot but this appears to happen.  On macOS, the open port shows in 
netstat but not lsof.  You can find the process ID with netstat but then, when 
you go to kill it, kill says there is no such process.  The important this is, 
of course, that trying to run another process with that port will fail.


Note that netstat on macOS does not have all the same command flags as the 
Linux version but you can see pids using:
netstat -anv


James

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