Problem

Application is not collecting or processing data (syslog, netflow). This is manifested by empty charts and presence of dropped packets in System view of the corresponding application module. This can happen due to low memory, power outage on the server.

Solution

Access the server via ssh and execute the following commands:

Execute commands in strict order to avoid improper application restart. Tomcat service must be started after PostgreSQL for instance.

  1. service tomcat6 stop
  2. service postgresql stop
  3. service postgresql start
  4. service tomcat6 start

Check the names of your services before attempting stop and start commands.. Names of Tomcat and PostgreSQL services may differ on different installations. For Example Tomcat may be tomcat6 or tomcat7 and PorstgreSQL may be postgresql-9.2 or postgresql-9.3