Below is the job details.
Dec 31, 2020 11:26:46 AM - Info nbjm (pid=11892) starting backup job (jobid=109657) for client PMCRABKPNAS01B, policy MCRA-ECM-FS01, schedule Weekly-Full
Dec 31, 2020 11:26:46 AM - Info nbjm (pid=11892) requesting STANDARD_RESOURCE resources from RB for backup job (jobid=109657, request id:{53FC0925-10B0-4055-AF08-0EF5CFA2B2AF})
Dec 31, 2020 11:26:46 AM - requesting resource MCRA_SO_FS_STO01-STU
Dec 31, 2020 11:26:46 AM - requesting resource PMCRABKPMST01.NBU_CLIENT.MAXJOBS.PMCRABKPNAS01B
Dec 31, 2020 11:26:46 AM - granted resource PMCRABKPMST01.NBU_CLIENT.MAXJOBS.PMCRABKPNAS01B
Dec 31, 2020 11:26:46 AM - granted resource MediaID=@aaaak;DiskVolume=MCRA_SO_FS_STO01;DiskPool=MCRA_SO_FS_STO01;Path=MCRA_SO_FS_STO01;StorageServer=COFC-PMCRASTORNCE01;MediaServer=pmcrabkpmed02
Dec 31, 2020 11:26:46 AM - granted resource MCRA_SO_FS_STO01-STU
Dec 31, 2020 11:26:47 AM - estimated 736458104 kbytes needed
Dec 31, 2020 11:26:47 AM - Info nbjm (pid=11892) started backup (backupid=PMCRABKPNAS01B_1609403207) job for client PMCRABKPNAS01B, policy MCRA-ECM-FS01, schedule Weekly-Full on storage unit MCRA_SO_FS_STO01-STU
Dec 31, 2020 11:26:48 AM - started process bpbrm (pid=3928)
Dec 31, 2020 11:27:00 AM - Info bpbrm (pid=3928) PMCRABKPNAS01B is the host to backup data from
Dec 31, 2020 11:27:00 AM - Info bpbrm (pid=3928) reading file list for client
Dec 31, 2020 11:27:01 AM - connecting
Dec 31, 2020 11:27:06 AM - Info bpbrm (pid=3928) starting bpbkar32 on client
Dec 31, 2020 11:27:12 AM - connected; connect time: 0:00:00
Dec 31, 2020 11:27:15 AM - Info bpbkar32 (pid=5592) Backup started
Dec 31, 2020 11:27:15 AM - Info bpbkar32 (pid=5592) change time comparison:<disabled>
Dec 31, 2020 11:27:15 AM - Info bpbkar32 (pid=5592) archive bit processing:<enabled>
Dec 31, 2020 11:27:15 AM - Info bptm (pid=6296) start
Dec 31, 2020 11:27:16 AM - Info bptm (pid=6296) using 262144 data buffer size
Dec 31, 2020 11:27:16 AM - Info bptm (pid=6296) setting receive network buffer to 1049600 bytes
Dec 31, 2020 11:27:16 AM - Info bptm (pid=6296) using 30 data buffers
Dec 31, 2020 11:27:16 AM - Info bptm (pid=6296) start backup
Dec 31, 2020 11:27:17 AM - Warning bpbrm (pid=3928) from client PMCRABKPNAS01B: WRN - can't open file: \\PMCRAVFSCIFS02\CTXPROFILES$\.copy_offload\.tokens (WIN32 5: Access is denied. )
Dec 31, 2020 11:27:17 AM - Info bptm (pid=6296) backup child process is pid 9920.8540
Dec 31, 2020 11:27:17 AM - Info bptm (pid=9920) start
Dec 31, 2020 11:27:17 AM - begin writing
Dec 31, 2020 11:27:38 AM - Error bptm (pid=9920) socket operation failed - 10054 (at ../child.c.1287)
Dec 31, 2020 11:27:38 AM - Critical bpbrm (pid=3928) from client PMCRABKPNAS01B: FTL - socket write failed
Dec 31, 2020 11:27:38 AM - Error bptm (pid=9920) unable to perform read from client socket, connection may have been broken
Dec 31, 2020 11:27:43 AM - Info pmcrabkpmed02 (pid=6296) StorageServer=hp-StoreOnceCatalyst:COFC-PMCRASTORNCE01; Report=scanned: 0 KB, CR sent: 0 KB, dedup: 0.00%
Dec 31, 2020 11:27:43 AM - Error bpbrm (pid=3928) could not send server status message to client
Dec 31, 2020 11:27:45 AM - Info bpbkar32 (pid=5592) done. status: 24: socket write failed
Dec 31, 2020 11:27:45 AM - end writing; write time: 0:00:28
socket write failed (24)
******************************************************************
Below is the output of bptestnetconn from client which is showing DNS Lookup failed for host pmcrabkpnas01b error:9003! , for others like master media servers the output is fine without any error.
And please note the the backup was working fine previuosly ..
SERVER = PMCRABKPMST01
SERVER = PMCRABKPMED01
SERVER = PMCRABKPMED02
SERVER = PMCRABKPMED03
SERVER = PHCRABKPMED01
------------------------------------------------------------------------
NBU IP_ADDRESS_FAMILY configured to use Remote Addresses: IPv4(yes) IPv6(no)
FL: PMCRABKPMST01 -> 10.161.4.10 : 0 ms FAST (< 10 sec) SRC: ANY
FL: PMCRABKPMED01 -> 10.161.4.11 : 0 ms FAST (< 10 sec) SRC: ANY
FL: PMCRABKPMED02-> 10.161.4.12 : 0 ms FAST (< 10 sec) SRC: ANY
FL: PMCRABKPMED03-> 10.161.4.13 : 0 ms FAST (< 10 sec) SRC: ANY
FL: PHCRABKPMED01-> 10.161.9.11 : 0 ms FAST (< 10 sec) SRC: ANY
------------------------------------------------------------------------
RL: 10.161.4.10 -> PMCRABKPMST01 : 0 ms FAST (< 10 sec)
RL: 10.161.4.11 -> PMCRABKPMED01 : 0 ms FAST (< 10 sec)
RL: 10.161.4.12 -> PMCRABKPMED02 : 0 ms FAST (< 10 sec)
RL: 10.161.4.13 -> PMCRABKPMED03 : 0 ms FAST (< 10 sec)
RL: 10.161.9.11 -> PHCRABKPMED01 : 0 ms FAST (< 10 sec)
RL: 127.0.0.1 -> PMCRABKPNAS01 : 0 ms FAST (< 10 sec)
DNS Lookup failed for host pmcrabkpnas01b error:9003!
------------------------------------------------------------------------
Total elapsed time: 2 sec