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ONTAP cluster node reboots unexpectedly: Process mgwd unresponsive for 11515 seconds (mgwd startup: "(2282)") in process nodewatchdog

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Category:
ontap-9
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core
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Applies to

ONTAP 9

Issue

  • Node unexpected reboot:

Process mgwd unresponsive for 11515 seconds (mgwd startup: "(2282)") in process nodewatchdog on release 9.7P22

  • Before node reboots, event log shows svm root volume full:

Wed Aug 21 12:19:40 +0900 [Node-01: wafl_exempt04: wafl.vol.full:alert]: Insufficient space on volume svm1_root@vserver:vserver-uuid to perform operation. 116MB was requested but only 75.0MB was available.
Wed Aug 21 12:29:40 +0900 [Node-01: wafl_exempt00: wafl.vol.full:alert]: Insufficient space on volume svm1_root@vserver:vserver-uuid to perform operation. 4.00KB was requested but only 1.00KB was available.
Wed Aug 21 12:39:40 +0900 [Node-01: wafl_exempt05: wafl.vol.full:alert]: Insufficient space on volume svm1_root@vserver:vserver-uuid to perform operation. 4.00KB was requested but only 1.00KB was available.
Wed Aug 21 12:45:29 +0900 [Node-01: wafl_exempt03: wafl.memory.statusLowMemory:notice]: WAFL is running low on memory, with 938MB remaining.
Wed Aug 21 14:29:50 +0900 [Node-01: wafl_exempt06: wafl.vol.full:alert]: Insufficient space on volume svm1_root@vserver:vserver-uuid to perform operation. 4.00KB was requested but only 1.00KB was available.
Wed Aug 21 14:39:53 +0900 [Node-01: wafl_exempt06: wafl.vol.full:alert]: Insufficient space on volume svm1_root@vserver:vserver-uuid to perform operation. 4.00KB was requested but only 1.00KB was available.
Thu Aug 22 00:44:02 +0900 [Node-01: wafl_exempt02: wafl.memory.statusVeryLowMemory:alert]: WAFL is running very low on memory, with 634MB remaining.
Thu Aug 22 00:56:25 +0900 [Node-01: wafl_exempt05: wafl.memory.statusVeryLowMemory:alert]: WAFL is running very low on memory, with 636MB remaining.

  • DF shows no available space in svm root volume:

Filesystem              kbytes       used      avail capacity  Mounted on
/vol/svm1_root/     72525891504 70495801660 2030089844      97%  /vol/svm1_root/
/vol/svm1_root/.snapshot 3817152184 10975695064          0     288%  /vol/svm1_root/.snapshot

  • cifs-share shows svm root volume is shared to user:

Vserver Share CIFS Server NetBIOS Name Path
svm1 01UserDataServer1 SH001084 /share/01UserDataServer1
svm1 02UserDataServer2 SH001084 /share/02UserDataServer2
...

 

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