HP XP Cluster Extension Software Administrator Guide

Pair/resync monitor messages in event log
Using the pair/resync monitor will cause a message in the system log file of your operating system
(for any non-PAIR state of the device/copy group being monitored). Those messages might indicate
the following:
• The RAID Manager instance is not running or cannot be used to gather device/copy group
state information.
• The device/copy group is not in the PAIR state.
This could be caused by Continuous Access link failures or manual manipulation of the disk pair
state.
TIP: Recover the PAIR state immediately, because replication of your data is not possible.
Check monitored disk pairs by invoking the following command from the command line:
clxchkmon –n application_name –g device_group –show
TIP: Disable application service failover for the time of the disk pair recovery (resynchronization).
XP Cluster Extension's logic is based on the assumption that if the monitor is enabled, immediate
action will be taken to recover a suspended disk pair.
Problem
Resource XYZ: XP Cluster Extension: device group XYZ is not in PAIR
state.
This message appears even though the device/copy group is in PAIR state.
Solution
If you are using the pair/resync monitor, the ResyncMonitorInterval must be less than or equal to
the resource monitor interval for the XP Cluster Extension resource to prevent erroneous logging.
The ResyncMonitorInterval in XP Cluster Extension defines when the pair/resync monitor checks
the actual device/copy group state. This state will be valid and shown until the next update
(ResyncMonitorInterval) occurs. If the actual XP disk pair state changes between two
ResyncMonitorInterval(s), the PAIR state shown by the pair/resync monitor will not be correct.
The resource monitor checks the status of the XP Cluster Extension resource at the resource monitor
interval of the cluster software. The XP Cluster Extension resource reports the status of the device/
copy group at that interval based on the current state in the pair/resync monitor.
If the ResyncMonitorInterval is set to a higher value than the resource monitor interval for the XP
Cluster Extension resource, the pair/resync monitor will update the device/copy group state less
often.
However, the XP Cluster Extension resource logs messages only if the device/copy group is not in
PAIR state or if a RAID Manager error occurred (for example, if RAID Manager is not running).
Example
Set the XP Cluster Extension agent's MonitorInterval attribute to 60 seconds (the default value);
then set the XP Cluster Extension resource ResyncMonitorInterval attribute to less than 60 seconds.
68 Troubleshooting