Oracle Linux: "Watchdog detected hard LOCKUP on cpu XX"

(Doc ID 2241626.1)

Last updated on APRIL 26, 2018

Applies to:

Linux OS - Version Oracle Linux 6.4 with Unbreakable Enterprise Kernel [3.8.13] to Oracle Linux 6.8 with Unbreakable Enterprise Kernel [3.8.13] [Release OL6U4 to OL6U8]
Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Linux x86-64

Symptoms

A server running UEKr3 kernel may show the following warning

Changes

The value of watchdog_thresh has been changed. 

Cause

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