Many devices show "DC Connection Lost" as a status

Products

• DX NetOps
• CA Performance Management - Usage and Administration

Issue/Introduction

After an unexpected outage, many devices show "DC Connection Lost" as a status despite polling metric data

Environment

All supported releases of DX NetOps Performance Management

Resolution

On the affected Data Collectors, follow these steps:

1. Stop ActiveMQ Service:

   systemctl stop activemq

2. Stop dcmd Service:

   systemctl stop dcmd

3. Navigate to the Scripts Directory:

   cd /opt/IMDataCollector/scripts

4. Clean the Data Collector:

   ./dcmd clean

5. Start dcmd Service:

   systemctl start dcmd

 

Additional Information

The command ./dcmd clean performs several actions to clean up the system. Here is a detailed breakdown:

1. Move Data to Backup:
   • The command moves existing data to a backup location named data.bak.
2. Remove Configuration File:
   • It removes the local-jms-broker.xml configuration file.
3. Create Data Directory:
   • The command creates a new data directory.
4. Change Ownership:
   • It changes the ownership of the new data directory to the install user.

In summary, ./dcmd clean helps to clear out old data and configuration files, create a fresh data directory, and ensure it has the correct ownership settings for the install user.