The Data Aggregator dadaemon service is restarting on it's own.
It is seen happening a few times a day, other times it's seen happening a few days apart.
The ActiveMQ service remains running, only the dadaemon service restarts.
In the (default path) /opt/IMDataAggregator/apache-karaf-<version> directory files named 'hs_err_pid<PID>.log are present. The <PID> represents the Process ID (PID) of the dadaemon service that is restarting. Within the file a message that states the following is seen.
# There is insufficient memory for the Java Runtime Environment to continue.
Excessive item counts triggering Out of Memory (OOM) errors for the dadaemon service which triggers its restart.
Release : 3.7
Component : IM Data Aggregator
Clean up the excessive items