CRS-2409:The clock on host is not synchronous with the mean cluster time (文档 ID 1135337.1)

In this Document

Cause

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 and later
Information in this document applies to any platform.
***Checked for relevance on 11-Mar-2013***

Symptoms

Cluster alert log on one of the nodes shows the following message

[ctssd(9534)]CRS-2409:The clock on host is not synchronous with the mean cluster time. No action has been taken as the Cluster Time Synchronization Service is running in observer mode.

What does this message mean?

Cause

This is not an error. ctssd is reporting that there is a time difference and it is not doing anything about it as it is running in observer mode.

Solution

The Cluster Time Synchronization Service (CTSS) is one of the new processes in the Oracle Clustware 11gR2 layer , the CTSS is installed during the GRID infrastructure installation.

CTSS Daemon is responsible for the time management within the cluster. It makes sure each node in the cluster is using the same time. First, CTSS will determine if a Network Time Protocol (NTP) daemon is running in the system and if NTP is not running, then CTSS will run in active mode and perform the same task as the NTP daemon. If NTP daemon is running, CTSS will be started in observer mode.

- We need to check if there is a time difference on the nodes.
- We need to make sure ntp is running properly and with -x option