Monitoring string with dynamic data


I have a string which has a dynamic number in the middle of it, how woud i go about monitoring the string considering it wont be the same every time due to the changing number?

eg: (ISO-host-async-XXX) Unknown Exception java.lang.NullPointerException

The XXX in the above string will be a 3 digit number which changes.


I believe that you could use a grok or dissect pattern to extract just the meaningful information (ISO-host-async) into a field.

Thanks for the quick reply! I am unfamiliar with dissect pattern, could you direct me toward a good resource which explains how to set this up?


The documentation is

I also found this nice online tool today:

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