emc nw nmm 备份MSSQL AG数据库发生ccur connection error

CLSPNB51     CLSPNB51.jad.net     <-- cluster name                          

MESPNB51     MESPNB51.jad.net     <-- active node1                          

FCSPNB51     FCSPNB51.jad.net     <-- active node2                          

MESPNB52     MESPNB52.jad.net     <-- standby node 

测试sqlserver备份的时候发现有几个就是备份不上。通过nsr_render log查看了 applogsx 下的nsrsqlsv.raw 发现了这个现象。

出问题的节点

37693 1/12/2017 7:30:16 AM  0 0 0 14356 12820 0 FCSPNB51.jad.net (pid12820) NSR info SQL Connection to FCSPNB51 is created. SQL Server Version is 12.00.4100

0 1/12/2017 7:30:17 AM  1 0 0 14356 12820 0 FCSPNB51.jad.net (pid12820) NSR notice nsr/db_apps/bsmsql/sqlutil.c(12387): SQL Server FILESTREAM Database called for database 'FCSIFDB'

65208 1/12/2017 7:32:17 AM  5 0 0 14356 12820 0 FCSPNB51.jad.net (pid12820) NSR critical nsr/db_apps/bsmsql/savemain.cpp(758): Error initializing the job. \n A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

\n NetWorker Server LGCHEMNJ-BACKUP is unavailable or does not support Jobs Daemon.

142036 1/12/2017 7:32:17 AM  0 0 0 14356 12820 0 FCSPNB51.jad.net (pid12820) NSR info Backup configured with maxtransfersize = 4194304

0 1/12/2017 7:32:22 AM  1 0 0 14356 12820 0 FCSPNB51.jad.net (pid12820) NSR notice Cannot determine the job ID: Cannot establish job ID with server.. Continuing ... 

正常使用的节点

43338 1/12/2017 8:59:55 AM  0 0 0 12020 7760 0 MESPNB51.jad.net (pid7760) NSR info   C:\Program Files\EMC NetWorker\nsr\bin\nsrsqlsv.exe -LL -l incr -s lgchemnj-backup -g LCHDCLSPNB51_N5_MESP_TLOG2 -m MESPNB51 -a device interface=data domain -a Data Domain interface=IP -b boostms1 -t 1484175748 -o RENAMED_DIRECTORIES:index_lookup=on;BACKUPTIME:lookup_range=1484175748:1484175748;REQUESTED_LEVEL:level=incr; -l incr -q -W 78 -j FALSE -z FEDERATED_SLAVE=true -z FEDINDEX_NAME=MSSQL -z FEDCLIENT_NAME=LCHDCLSPNB51 -N MSSQL#AVG_N5MES: MSSQL:MESP MSSQL:MESIFDB MSSQL:N5.EIF.LogDB MSSQL:LG

37693 1/12/2017 8:59:55 AM  0 0 0 12020 7760 0 MESPNB51.jad.net (pid7760) NSR info SQL Connection to MESPNB51 is created. SQL Server Version is 12.00.4100

0 1/12/2017 9:00:02 AM  1 0 0 12020 7760 0 MESPNB51.jad.net (pid7760) NSR notice nsr/db_apps/bsmsql/sqlutil.c(12387): SQL Server FILESTREAM Database called for database 'GMESELTRP01'

0 1/12/2017 9:00:02 AM  1 0 0 12020 7760 0 MESPNB51.jad.net (pid7760) NSR notice nsr/db_apps/bsmsql/sqlutil.c(12387): SQL Server FILESTREAM Database called for database 'GMESELTRP01IF'

0 1/12/2017 9:00:02 AM  1 0 0 12020 7760 0 MESPNB51.jad.net (pid7760) NSR notice nsr/db_apps/bsmsql/sqlutil.c(12387): SQL Server FILESTREAM Database called for database 'N5.EIF.ASSY'

0 1/12/2017 9:00:02 AM  1 0 0 12020 7760 0 MESPNB51.jad.net (pid7760) NSR notice nsr/db_apps/bsmsql/sqlutil.c(12387): SQL Server FILESTREAM Database called for database 'N5.EIF.EL'

在正常节点也看到了备份请求先进入的是这边

98921 1/12/2017 7:14:09 AM  5 0 0 4620 7104 0 MESPNB51.jad.net (pid7104) NSR critical Failed to get preferred node for backup of Availability group (AVG_N5FCS) with error: Can't connect to RPC server on FCSPNB51.jad.net.

0 1/12/2017 7:14:09 AM  1 0 0 4620 7104 0 MESPNB51.jad.net (pid7104) NSR notice nsr/db_apps/bsmsql/savemain.cpp(365): Entering cleanUp().

问题是 在出问题的节点似乎备份在发起之后2分钟之后才能启动备份而在正常节点却是正常立即就执行的。

网络没问题，该怎么办？