Several Metric Families stuck in a Discovering status

Products

• CA Infrastructure Management
• CA Performance Management - Usage and Administration
• DX NetOps

Issue/Introduction

In Monitored Devices, several Metric Families display Discovering for an extended period and do not return to the Supported state.

Environment

Release : 20.2

Component : IM Reporting / Admin / Configuration

Cause

These Metric Family discoveries are likely in a "stuck" state and this can be viewed by monitoring the discovery bean:

http://daHostname:8581/debug/dispatcher/container/com.ca.im.aggregator.discovery/bean/managedDeviceComponentDiscovery

This will show the current running discoveries so if you view this over a period of time and the device(s) in question remain listed, they are likely stuck.

Resolution

To clear the stuck discoveries we need to restart the Data Aggregator dadaemon service

Normal Configuration:

systemctl restart dadaemon

 

Fault-Tolerant Configuration:

/opt/IMDataAggregator/scripts/dadaemon maintenance

Note: This forces a failover to the other Data Aggregator