Yet another Greenplum Interconnect error

I’ve faced yet another Greenplum Interconnect error with the following error: "ERROR","58M01","Interconnect Error: Could not connect to seqserver. (seg0 slice1 gpslave1:40000 pid=14231)","Connection refused (connect errno 111)" After doing tons of checks on the gpslave1 server itself, nothing was found to be problematic. Ping shows reply, telnet to the ports shows active and no errors could be found. Finally, on the master itself, I tried to ping the configured host of the master and it returned 127....