Hello @raj231,
I cannot give you the answer/solution to that question, since you probably better be asking it to whom provided you the solution.
What I can tell is that, if it this file is big enough, it might cause problems as:
- slowness loading the history of executions
- JVM errors
- timeouts
- and such...
The reasons is that this is a text file, which is read/wrote and loaded in sequential basis, hence some periodic maintenance in this file would help you with the health of this service.
Please note the fact I mentioned "periodic maintenance": always healthier to act pro-actively than react to errors.
Anyway, this is only for the Flow Manager, a client application. Just to be clear, js.events should not affect the availability of your server, just the client (because it is Java based)