Data Aggregator keeps shutting down with the following error in the karaf.log file.
ERROR | t Monitor Thread | 2015-09-03 10:19:48,944 | shutdown | ase.heartbeat.DBStateManagerImpl 385 | ommon.core.services.impl | | DB heartbeat to host ><hostname of Db execeeded max non-success time of 300000
WARN | t Monitor Thread | 2015-09-03 10:19:48,944 | shutdown | ase.heartbeat.DBStateManagerImpl 726 | ommon.core.services.impl | | DB state for host <hostname of Db> changing from OK to DOWN
If there is no valid database connection then the Data Aggregator shuts down.
The two solutions for each common cause are as follows.