Tom Lane <t...@sss.pgh.pa.us> wrote:
 
> In general, sockets sitting a long time in TIME_WAIT would be a
> network problem.  That state means the user process already closed
> the socket and the network stack is waiting for the other end to
> acknowledge connection closure.  If it's not getting the ACK then
> you have either buggy network code in one kernel or the other, or
> a network-level problem (maybe an overaggressive firewall in
> between?).
 
Not to discount those possibilities, but I've seen one other cause:
a storm of connection attempts.  It could be a DoS attack or a
poorly written client.
 
-Kevin

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