- **status**: assigned --> fixed


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** [tickets:#3284] immd: failed to find candidate for new immnd coordinator**

**Status:** fixed
**Milestone:** 5.21.12
**Created:** Wed Sep 22, 2021 07:14 AM UTC by Huu The Truong
**Last Updated:** Wed Sep 22, 2021 07:18 AM UTC
**Owner:** Huu The Truong


Poweroff active SC and expect standby SC became active. Howerver, standby SC 
didn't become active SC.
Because value of onCtrlr in immnd tree is not "1":

<143>1 2021-08-23T12:20:53.566177+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7458"] 404:imm/immd/immd_proc.c:975 T5 +++++++++++++IMMND Tree is 
UP++++++++++++++++++++
<143>1 2021-08-23T12:20:53.56619+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7459"] 404:imm/immd/immd_proc.c:977 T5 Number of nodes in IMMND 
Tree:  4
<143>1 2021-08-23T12:20:53.566206+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7460"] 404:imm/immd/immd_proc.c:990 T5    
-------------------------------------------
<143>1 2021-08-23T12:20:53.56622+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7461"] 404:imm/immd/immd_proc.c:993 T5    MDS Node ID:  = 2020f
<143>1 2021-08-23T12:20:53.566234+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7462"] 404:imm/immd/immd_proc.c:1001 T5    Pid:416 Epoch:7 syncR:0 
syncS:0 onCtrlr:0 isCoord:0
<143>1 2021-08-23T12:20:53.566249+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7463"] 404:imm/immd/immd_proc.c:990 T5    
-------------------------------------------
<143>1 2021-08-23T12:20:53.566266+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7464"] 404:imm/immd/immd_proc.c:993 T5    MDS Node ID:  = 2030f
<143>1 2021-08-23T12:20:53.566283+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7465"] 404:imm/immd/immd_proc.c:1001 T5    Pid:416 Epoch:7 syncR:0 
syncS:0 onCtrlr:0 isCoord:0
<143>1 2021-08-23T12:20:53.566298+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7466"] 404:imm/immd/immd_proc.c:990 T5    
-------------------------------------------
<143>1 2021-08-23T12:20:53.566311+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7467"] 404:imm/immd/immd_proc.c:993 T5    MDS Node ID:  = 2040f
<143>1 2021-08-23T12:20:53.566325+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7468"] 404:imm/immd/immd_proc.c:1001 T5    Pid:416 Epoch:7 syncR:0 
syncS:0 onCtrlr:0 isCoord:0
<143>1 2021-08-23T12:20:53.56634+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7469"] 404:imm/immd/immd_proc.c:990 T5    
-------------------------------------------
<143>1 2021-08-23T12:20:53.566353+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7470"] 404:imm/immd/immd_proc.c:993 T5    MDS Node ID:  = 2050f
<143>1 2021-08-23T12:20:53.566366+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7471"] 404:imm/immd/immd_proc.c:1001 T5    Pid:416 Epoch:7 syncR:0 
syncS:0 onCtrlr:0 isCoord:0
<143>1 2021-08-23T12:20:53.566382+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7472"] 404:imm/immd/immd_proc.c:1006 T5  End of IMMND Info
<143>1 2021-08-23T12:20:53.566396+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7473"] 404:imm/immd/immd_proc.c:1008 T5  End of IMMND info nodes
<143>1 2021-08-23T12:20:53.566409+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7474"] 404:imm/immd/immd_proc.c:1011 T5 *****************End of 
IMMD CB Dump******************

Thus, standby SC cannot promote to be a new immnd coordinator for itself. That 
mean it didn't become active SC and all IMMNDs will restart:

<141>1 2021-08-23T12:20:54.316317+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7513"] 404:imm/immd/immd_evt.c:3085 NO ellect_coord invoke from 
rda_callback ACTIVE
<143>1 2021-08-23T12:20:54.31632+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7514"] 404:imm/immd/immd_proc.c:236 >> immd_proc_elect_coord 
<139>1 2021-08-23T12:20:54.31634+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7515"] 404:imm/immd/immd_proc.c:400 ER Failed to find candidate for 
new IMMND coordinator (ScAbsenceAllowed:0 RulingEpoch:7
<143>1 2021-08-23T12:20:54.316345+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7516"] 404:imm/immd/immd_proc.c:402 << immd_proc_elect_coord 
<143>1 2021-08-23T12:20:54.316348+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7517"] 404:imm/immd/immd_proc.c:70 >> immd_proc_immd_reset 
<139>1 2021-08-23T12:20:54.316365+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7518"] 404:imm/immd/immd_proc.c:74 ER Active IMMD has to restart 
the IMMSv. All IMMNDs will restart
<143>1 2021-08-23T12:20:54.316379+02:00 SC-5 osafimmd 404 osafimmd [meta 
sequenceId="7519"] 404:imm/immd/immd_mbcsv.c:45 >> immd_mbcsv_sync_update 

Then elect another the SC become active SC.



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