Data Collectors status Unknown, when second DA is active

Products

• DX NetOps
• CA Performance Management - Usage and Administration

Issue/Introduction

When the secondary DA becomes active,  Data Collectors status shows as Unknown | Config Status Unknown

Environment

Performance Management - All Versions

Cause

Customer has a Fault Tolerant  Data Aaggregator, but their DC activemq.xml only shows 1 DA host

Resolution

1. Reinstall the DC using export DCM_ID step, and answer YES to setup FT DA DC

1. Find the existing DCM_ID using <DA_HOST>:8581/rest/dcms
2. Run the following to set the DCM_ID variable in the shell:
3. export DCM_ID=<DC_HostName>:<ID>
4. Run the install.bin for the DC in -i console mode.

2. Check /opt/DCM.cfg also. it'll state if Fault Tolerance is being used and has both DA hostnames.

KARAF_ROOT=/###/####/IMDataCollector
DCM_COUNT=1
KARAF_ROOT_EXISTS=true
APACHE_KARAF=apache-karaf-4.4.3
ACTIVEMQ_HOME=/###/#####/IMDataCollector/broker/apache-activemq-5.18.3
IM_MAX_MEM=11609M
DCM_USER=####
ACTIVEMQ_EXTERNALIZATION_UPGRADE_HAPPENED=true
IS_DA_HA_CONFIGURED=yes
DA_HOST=#####1
DA_STANDBY_HOST=#####2