12c DNFS Database Long Timeout and Reports "Direct NFS: channel id [#] path [#] to filer is DOWN"
(Doc ID 2011623.1)
Last updated on FEBRUARY 25, 2022
Applies to:
Oracle Database - Enterprise Edition - Version 11.2.0.3 to 12.1.0.2 [Release 11.2 to 12.1]Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
11.2/12c[12.1.0.2.1] DNFS Databases is reporting the following message:
7) There is a 5 minute wait, as shown above, before DNFS reconnects the mounts. Once it is reconnected, activity can resume. However, at the OS level, they only have about a 2-3 minute wait for the switchover of the pools to complete. After that time, the local NFS mounts are available for reading/writing. But within the database, there is that exactly 5 minute wait. Even SQL*Plus queries hang until the "Direct NFS: channel is up" message.
8) The problem is not present on databases using regular NFS.
Changes
Cause
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In this Document
| Symptoms |
Step to reproduce the problem |
| Changes |
| Cause |
| Solution |
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| References |