pg_upgrade : 9.X to 11.X issue CentoOS 7.6

Hi Team,

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,