pg_upgrade : 9.X to 11.X issue CentoOS 7.6 - Mailing list pgsql-general

Please give me some pointers to resolve this issue.

-bash-4.2$ export OLDCLUSTER=/usr/pgsql-9.2
-bash-4.2$ export NEWCLUSTER=/usr/pgsql-11

-bash-4.2$ /usr/pgsql-11/bin/pg_upgrade --old-bindir=$OLDCLUSTER/bin --new-bindir=$NEWCLUSTER/bin --old-datadir=/data/db/data --new-datadir=/pgdata/11/data -p 5432 -P 5433 --check
Performing Consistency Checks
-----------------------------
Checking cluster versions                                   ok

*failure*
Consult the last few lines of "pg_upgrade_server.log" for
the probable cause of the failure.

connection to database failed: could not connect to server: No such file or directory
        Is the server running locally and accepting
        connections on Unix domain socket "/var/lib/pgsql/.s.PGSQL.5432"?

could not connect to source postmaster started with the command:
"/usr/pgsql-9.2/bin/pg_ctl" -w -l "pg_upgrade_server.log" -D "/data/db/data" -o "-p 5432 -b  -c listen_addresses='' -c unix_socket_permissions=0700 -c unix_socket_directory='/var/lib/pgsql'" start
Failure, exiting
-bash-4.2$ 

+++

-bash-4.2$ /usr/pgsql-9.2/bin/pg_ctl -D "/data/db/data" start -l logfile
server starting
-bash-4.2$

+++

-bash-4.2$ /usr/pgsql-11/bin/pg_upgrade --old-bindir=$OLDCLUSTER/bin --new-bindir=$NEWCLUSTER/bin --old-datadir=/data/db/data --new-datadir=/pgdata/11/data -p 5432 -P 5433  --check
Performing Consistency Checks on Old Live Server
------------------------------------------------
Checking cluster versions                                   ok
Checking database user is the install user                  ok
Checking database connection settings                       ok
Checking for prepared transactions                          ok
Checking for reg* data types in user tables                 ok
Checking for contrib/isn with bigint-passing mismatch       ok
Checking for invalid "unknown" user columns                 ok
Checking for hash indexes                                   ok
Checking for roles starting with "pg_"                      ok
Checking for incompatible "line" data type                  ok
Checking for presence of required libraries                 ok
Checking database user is the install user                  ok
Checking for prepared transactions                          ok

*Clusters are compatible*
-bash-4.2$ 

+++

-bash-4.2$ /usr/pgsql-11/bin/pg_upgrade --old-bindir=$OLDCLUSTER/bin --new-bindir=$NEWCLUSTER/bin --old-datadir=/data/db/data --new-datadir=/pgdata/11/data -p 5432 -P 5433

There seems to be a postmaster servicing the old cluster.
Please shutdown that postmaster and try again.
Failure, exiting
-bash-4.2$ 

-bash-4.2$ /usr/pgsql-9.2/bin/pg_ctl -D "/data/db/data" stop -l logfilewaiting for server to shut down.... done
server stopped
-bash-4.2$ 

-bash-4.2$ /usr/pgsql-11/bin/pg_upgrade --old-bindir=$OLDCLUSTER/bin --new-bindir=$NEWCLUSTER/bin --old-datadir=/data/db/data --new-datadir=/pgdata/11/data -p 5432 -P 5433
Performing Consistency Checks
-----------------------------
Checking cluster versions                                   ok

*failure*
Consult the last few lines of "pg_upgrade_server.log" for
the probable cause of the failure.

connection to database failed: could not connect to server: No such file or directory
        Is the server running locally and accepting
        connections on Unix domain socket "/var/lib/pgsql/.s.PGSQL.5432"?

could not connect to source postmaster started with the command:
"/usr/pgsql-9.2/bin/pg_ctl" -w -l "pg_upgrade_server.log" -D "/data/db/data" -o "-p 5432 -b  -c listen_addresses='' -c unix_socket_permissions=0700 -c unix_socket_directory='/var/lib/pgsql'" start
Failure, exiting
-bash-4.2$ 

Thanks,