Hello.
It seems that the client timeout has been reached.
pound: XXXXX, (7f68b12aa6c0) error read from YYYYY: Connection timed out
And then, the reverse proxy closes the connection with the backend.
pound: XXXXX, service KKKKK, backend ZZZZZ:8280, (7f68b16796c0) error copy server cont: Broken pipe
How many connections are we talking about?
What’s the current value of client and backend timeouts?
Does the log file says about any error in the system?
Cheers.