Guest User

I just started using the JENNIFER. Among the instances located on the upper dashboard, a few of them became STOP. According to the error log, I noticed an error message of “java.lang.IllegalArgumentException: hostname can’t be null.” I did not apply anything other than the JVM arguments of instance. How will I be able to activate the monitoring of the instance? It will be much helpful if you could explain a way to reactivate the monitoring. Please refer to the attached image.

Khalid Saeed

The instance you mentioned has been closed or the JENNIFER agent has not been applied to it. The error was created because the JENNIFER server was sending a setting file to the agent. Other than the instance was closed, it is periodic error.