L2 watchdog リセット後に「 ADR timeout 」イベントが報告される

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Category:: fas-systems<a>2008670674</a><a>ADR タイムアウト</a>

Specialty:: HW

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環境

ONTAP 9
FAS8200
AFF A300

問題

ADR（Asynchronous DRAM Refresh）後のL2ウォッチドッグタイムアウトが原因でノードが停止しました。events all ログの例：

Record 392: Sat Feb 27 03:41:59 2021 [IPMI.critical]: ADR event ID: 0 at time: 1614397319 Record 393: Sat Feb 27 03:41:59 2021 [IPMI.critical]: ADR Battery destage cycles: 19 Record 394: Sat Feb 27 03:42:01 2021 [IPMI Event.critical]: NMI Record 395: Sat Feb 27 03:42:01 2021 [IPMI.notice]: bd00 | 02 | EVT: 6fc824ff | System_Watchdog | Assertion Event, "Timer interrupt" Record 396: Sat Feb 27 03:42:02 2021 [IPMI Event.critical]: L2 watchdog timeout hard reset Record 397: Sat Feb 27 03:42:02 2021 [Trap Event.critical]: hwassist l2_watchdog_reset (29) Record 398: Sat Feb 27 03:42:02 2021 [Trap Event.critical]: SNMP l2_watchdog_reset (29) Record 399: Sat Feb 27 03:42:02 2021 [SysFW.notice]: ADR Timeout Record 400: Sat Feb 27 03:42:02 2021 [SysFW.notice]: ADR Timeout Record 401: Sat Feb 27 03:42:07 2021 [IPMI.notice]: be00 | 02 | EVT: 6fc104ff | System_Watchdog | Assertion Event, "Hard reset" Record 402: Sat Feb 27 03:42:12 2021 [SP.critical]: Filer Reboots