dbrmworkernode failed at UM1 and the other non-OAM Module

Ubuntu16

System and Module statuses

Component Status Last Status Change
------------ -------------------------- ------------------------
System FAILED Thu Jul 19 15:31:58 2018

Module um1 MAN_OFFLINE Thu Jul 19 15:31:56 2018
Module pm1 ACTIVE Thu Jul 19 15:21:27 2018
Module pm2 FAILED Thu Jul 19 15:31:55 2018

Active Parent OAM Performance Module is 'pm1'
MariaDB ColumnStore Replication Feature is enabled

MariaDB ColumnStore Process statuses

Process Module Status Last Status Change Process ID
------------------ ------ --------------- ------------------------ ----------
ProcessMonitor um1 ACTIVE Thu Jul 19 15:14:18 2018 10395
ServerMonitor um1 ACTIVE Thu Jul 19 15:21:23 2018 12108
DBRMWorkerNode um1 FAILED Thu Jul 19 15:21:22 2018
ExeMgr um1 MAN_OFFLINE Thu Jul 19 15:19:05 2018
DDLProc um1 MAN_OFFLINE Thu Jul 19 15:19:05 2018
DMLProc um1 MAN_OFFLINE Thu Jul 19 15:19:05 2018
mysqld um1 ACTIVE Thu Jul 19 15:32:04 2018 12064

ProcessMonitor pm1 ACTIVE Thu Jul 19 15:13:34 2018 16410
ProcessManager pm1 ACTIVE Thu Jul 19 15:13:40 2018 16480
DBRMControllerNode pm1 ACTIVE Thu Jul 19 15:21:19 2018 23674
ServerMonitor pm1 ACTIVE Thu Jul 19 15:21:21 2018 23718
DBRMWorkerNode pm1 ACTIVE Thu Jul 19 15:21:21 2018 23756
DecomSvr pm1 ACTIVE Thu Jul 19 15:21:25 2018 23905
PrimProc pm1 ACTIVE Thu Jul 19 15:21:27 2018 23958
WriteEngineServer pm1 ACTIVE Thu Jul 19 15:21:28 2018 23997

ProcessMonitor pm2 ACTIVE Thu Jul 19 15:14:22 2018 4425
ProcessManager pm2 HOT_STANDBY Thu Jul 19 15:21:14 2018 4632
DBRMControllerNode pm2 COLD_STANDBY Thu Jul 19 15:31:53 2018
ServerMonitor pm2 ACTIVE Thu Jul 19 15:31:56 2018 4928
DBRMWorkerNode pm2 FAILED Thu Jul 19 15:31:55 2018
DecomSvr pm2 MAN_OFFLINE Thu Jul 19 15:19:05 2018
PrimProc pm2 MAN_OFFLINE Thu Jul 19 15:19:05 2018
WriteEngineServer pm2 MAN_OFFLINE Thu Jul 19 15:19:05 2018

Above is the current status of my UM and PM. I have created this issue when my server suddenly went off without taking mariaDB down.I have tried to restart the system but still doesn't work.

Can you help me to restore UM server?