Cyrus POP3 Deadlocks in 2.1.16

[Kevin P. Fleming]

Michael Loftis wrote:
> Actually the deadlock seems to be pretty independent of the version 
> because we had this happening back in 2.0 in a redhat system.  I can't 
> find a trigger or any reason for it, POP3 just *STOPS* dead int eh 
> water. Stopping all cyrus and restarting never helps, only way to get 
> POP3 back is to reboot.  When it happens POP3 gets your a connection, 
> but will NEVER banner, all other services are normal, no log entries 
> indicate illness, nothing.

This sounds EXACTLY like some other daemon is being started and is 
taking the POP3 port away from Cyrus' "master" process. I'm not sure how 
this would be possible, but it would depend on your OS and a lot of 
other factors.
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