DNFS DB hangs after losing one path (Doc ID 2286174.1)

Last updated on JULY 13, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

Symptoms

RHEL7/OL7 With 12.1.0.2 DB, DNFS enabled

DNFS is using multiple paths configured in oranfstab. But it never marks the paths as “down” when they get physically disconnected, so the DB hangs[DML/DDL Operations] until the interface becomes available again.

"ifdown eth2" behaves in expected way, transactions continues through other available path.

oranfstab
===========
server: ZFS
path: 10.242.120.94
local: 10.242.221.184
path: 10.242.223.213
local: 10.242.222.241<<<<<<<<<<<<ETH2, detaching the cable
export: /export/fra/ora mount: /oradata/fra

 

No errors were seen from any of the logs. Also the same setup work in expected way in RHEL6/OL6

Changes

 Test failover scenario to confirm the high availability

Cause

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