Ian Barwick 8f7a32a9a2 repmgr: prevent termination in corner-case situation ...

If neither the local node nor the upstream are available, and
"standby_disconnect_on_failover" is set, attempting to fetch
the walreceiver PID will result in repmgrd terminating.

Add a check that the connection is valid before attempting to
fetch the walreceiver PID.

Addresses GitHub #675.

2020-11-17 16:34:55 +09:00

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