postgres backup (pg_basebackup) is failed.

Hello Experts,

i am running postgres online backup with pg_basebasckup. and backup is
failed for some reason. kindly help me on this .

here are the details:
postgres version : 11.2

[postgres(at)pglinux1:/oraworkspace/pg_scripts ] $ psql -V
psql (PostgreSQL) 11.2

pg_basebackup version:
[postgres(at)pglinux1:/oraworkspace/pg_scripts ] $ pg_basebackup -V
pg_basebackup (PostgreSQL) 11.2

os version

[postgres(at)pglinux1:/oraworkspace/pg_scripts ] $ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.3 (Maipo)

backup command
[postgres(at)pglinux1:/oraworkspace/pg_scripts ] $
[postgres(at)pglinux1:/oraworkspace/pg_scripts ] $ pg_basebackup -h localhost
-p 5400 -D /oraworkspace/pgbackup/5400backup
--waldir=/oraworkspace/pgbackup/bkpwal_log --checkpoint=fast
--wal-method=stream -v
pg_basebackup: initiating base backup, waiting for checkpoint to complete
pg_basebackup: checkpoint completed
pg_basebackup: write-ahead log start point: 9/5B000028 on timeline 1
pg_basebackup: directory "/oradbaudit/pg_data_tbsp" exists but is not empty
pg_basebackup: removing contents of data directory
"/oraworkspace/pgbackup/5400backup"
pg_basebackup: removing contents of WAL directory
"/oraworkspace/pgbackup/bkpwal_log"
[postgres(at)pglinux1:/oraworkspace/pg_scripts ] $ timed out waiting for
input: auto-logout

postgres alert log

2019-05-03 17:16:00.204 GMT [6646] [unknown] [unknown] [unknown]
localhost(53866) 00000 5ccc7750.19f6 0 2019-05-03 17:16:00 GMT LOG:
connection received: host=localhost port=53866
2019-05-03 17:16:00.206 GMT [6646] [unknown] postgres [unknown]
localhost(53866) 00000 5ccc7750.19f6 0 2019-05-03 17:16:00 GMT LOG:
replication connection authorized: user=postgres
2019-05-03 17:16:00.245 GMT [6474] 00000 5ccc7743.194a 0 2019-05-03
17:15:47 GMT LOG: checkpoint starting: immediate force wait
2019-05-03 17:16:00.260 GMT [6474] 00000 5ccc7743.194a 0 2019-05-03
17:15:47 GMT LOG: checkpoint complete: wrote 0 buffers (0.0%); 0 WAL
file(s) added, 1 removed, 0 recycled; write=0.003 s, sync=0.000 s,
total=0.014 s; sync files=0, longest=0.000 s, average=0.000 s;
distance=16384 kB, estimate=16384 kB
2019-05-03 17:16:00.348 GMT [6646] pg_basebackup postgres [unknown]
localhost(53866) 08006 5ccc7750.19f6 0 2019-05-03 17:16:00 GMT LOG: could
not send data to client: Connection reset by peer
2019-05-03 17:16:00.348 GMT [6646] pg_basebackup postgres [unknown]
localhost(53866) XX000 5ccc7750.19f6 0 2019-05-03 17:16:00 GMT ERROR: base
backup could not send data, aborting backup
2019-05-03 17:16:00.349 GMT [6646] pg_basebackup postgres [unknown]
localhost(53866) 08006 5ccc7750.19f6 0 2019-05-03 17:16:00 GMT LOG: could
not send data to client: Broken pipe
2019-05-03 17:16:00.349 GMT [6646] pg_basebackup postgres [unknown]
localhost(53866) 08006 5ccc7750.19f6 0 2019-05-03 17:16:00 GMT FATAL:
connection to client lost
2019-05-03 17:16:00.349 GMT [6646] pg_basebackup postgres [unknown]
localhost(53866) 00000 5ccc7750.19f6 0 2019-05-03 17:16:00 GMT LOG:
disconnection: session time: 0:00:00.145 user=postgres database=
host=localhost port=53866

--

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