>(with the 16 child processes) for around 20 thousand devices

Congratulations, you've implemented a network & services monitor. Best bet here is to be able to detect and recover or retry whatever it is you were doing when the connection was broken or failed.

In reply to Re: packet_write_wait: Connection to xx.xx.xx.xx port 22: Broken pipe by perlfan
in thread packet_write_wait: Connection to xx.xx.xx.xx port 22: Broken pipe by TusharK

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