Pivotal Greenplum(GPDB) v18.104.22.168
During the standby initialization , you encounter the below error message.
gpinitstandby:mdw:gpadmin-[ERROR]:-Error initializing standby master: ExecutionError: 'non-zero rc: 1' occured. Details: 'ssh -o 'StrictHostKeyChecking no' smdw ". /usr/local/greenplum-db/./greenplum_path.sh; pg_basebackup -x -R -E ./pg_log -E ./gp_dumps -E ./gpperfmon/data -D /data/master/gpseg-1 -h mdw -p 5432"' cmd had rc=1 completed=True halted=False
stderr='pg_basebackup: could not connect to server: FATAL: option not supported: "replication"
During the GPDB upgrade from v4.2.x to v22.214.171.124 if the upgrade failed or had errors during execution then starting the GPDB using v4.3 binary file and running gpinitstandby would lead to this error message.
Run gpmigrator/gpmigrator_mirror again and make sure it finished without any error.