Description:
On certain rare ocassions in Silver Fabric 5.7, you see "SEVERE: [EngineConfigHandler] while modifying configuration linux64:default java.lang.NullPointerException" in the broker logs when you modify the engine configuration on the Silver Fabric Broker UI and the changes do not get saved. This happens when there are some engines with that configuration running active components.

On certain rare ocassions in Silver Fabric 5.7, you see "SEVERE: [EngineConfigHandler] while modifying configuration linux64:default java.lang.NullPointerException" in the broker logs when you modify the engine configuration on the Silver Fabric Broker UI and the changes do not get saved. This happens when there are some engines with that configuration running active components.

Following the below steps will help resolve the issue in such cases:

-Log out of the broker.
-Clear the browser cache and retry the operation Eg:- From Broker UI,  Config->Engines->under Logging change FILE_EXPIRATION from 120 to 8 and MAX_FILES from 0 to 10 and Save.  It should reflect the changed values on UI.

NullPointerException in broker logs when modifying engine configuration.