VMAX AFA & PowerMax: VDM cannot load after DM panic due to blocked threads when running Embedded NAS 8.1.15.401 and NFSv4 mounted filesystem.

Summary: VDM cannot load after a DataMover (DM) panic due to blocked threads, issue is when eNAS is running Version 8.1.15.401 and NFSv4 mounted filesystem.

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Symptoms

VDM cannot load after  a DataMover (DM) panic due to blocked threads, issue is when eNAS is running Version 8.1.15.401 with NFSv4.

From the Logs: 

Aug  8 07:59:57 2022:DART:KERNEL:ERROR:3:Slot 2:::1659959974:ThreadsServicesSupervisor: Service:NFSD Pool:NFSD_v4Daemons BLOCKED for 422 seconds: Server operations may be impacted .
Aug  8 07:59:57 2022:DART:KERNEL:ERROR:3:Slot 2:::1659959974:ThreadsServicesSupervisor: Service:NFSD Pool:NFSD_Exec BLOCKED for 400 seconds: Server operations may be impacted .

Cause

  • There is an issue with the code in NFSv4_ClientList::Clean().
  • Upgrading to Cumulative Epack 5978.711.711_9699 or 9734 will upgrade eNAS version to 8.1.15.401 and introduce exposure if a filesystem is mounted with NFSv4.

Resolution

  • Customers running eNAS version 8.1.15.401 (Released in Cumulative Epacks 5978.711.711_9699 and 9734) and have NFSv4 mounted filesystems the recommendation is to remount the filesystem with NFSv3.
  • Customers running eNAS version 8.1.15.401 should submit an Epack request, requesting eNAS version 8.1.15.402.

Produse afectate

PowerMax, Symmetrix, VMAX
Proprietăți articol
Article Number: 000202531
Article Type: Solution
Ultima modificare: 14 Dec 2022
Version:  8
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