Foglight HA server fails over every 3-4 days without specific reason (4245956)

The Foglight high availability (HA) primary server fails over to the secondary server every 3-4 days without any specific reason.

The following tuning steps might help here:

1. Navigate to the "Administration | Agents | Agent Properties" dashboard and select "FglAM | FglAMAdapter"
2. Change the value for "Maximum size of the adapter thread pool" to 50 and save. The default value should be 50, but in older Foglight versions it might be lower. 
3. Login the Foglight server and go to "$FMS_Home/server/tomcat/"   
4. Make a backup copy of "server.xml". Now change the value for "maxThreads" from 250 to 400 to make sure Tomcat can have enough threads to handle requests. This needs to be done on both nodes.
5. Now go to "$FMS_Home/server/jboss/deploy/"
6. Make a backup copy of "cluster-service.xml". In the TCP Config part change:
   <FD timeout="10000" max_tries="5" down_thread="false" up_thread="false" shun="true"/>
   <VERIFY_SUSPECT timeout="1500" down_thread="false" up_thread="false"/>
   
   To
   <FD timeout="10000" max_tries="10" down_thread="true" up_thread="true" shun="true"/>
   <VERIFY_SUSPECT timeout="3000" down_thread="false" up_thread="false"/>

The above steps needs to be done on both nodes.