Data Aggregator Service down

Document ID : KB000111076
Last Modified Date : 14/08/2018
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Issue:
Need help to get the da running and see why it stopped
Environment:
CAPM 3.x
Cause:
Karaf.log from 8.3 shows the DA lost connection to the DR. And that is why the DA shutdown.

excerpt from log:
ERROR | anager-thread-13 | 2018-08-03 23:31:49,439 | shutdown | tTolerantDBConnectionManagerImpl 179 | ommon.core.services.impl | | The primary data repository host '<DR_HOST_NAME>' is no longer available, and there are no available secondary hosts. Current Host Status: {<DR_HOST_NAME>=DOWN} 
Resolution:
Restarted the Data Aggregator (DA)

service activemq stop
service dadaemon start


dr has been up for some time.
possible network issue.