Apurva Mehta created KAFKA-5679:
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             Summary: Add logging to distinguish between internally and 
externally initiated shutdown of Kafka
                 Key: KAFKA-5679
                 URL: https://issues.apache.org/jira/browse/KAFKA-5679
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 0.11.0.0
            Reporter: Apurva Mehta
            Assignee: Apurva Mehta
             Fix For: 1.0.0


Currently, if there is an internal error that triggers a shutdown of the Kafka 
server, the {{Exit}} class is used, which begins the shutdown procedure. The 
other way a shutdown is triggered is by {{SIGTERM}} or some other signal.

We would like to distinguish between shutdown due to internal errors and 
external signals. This helps when debugging. Particularly, a natural question 
when a broker shuts down unexpectedly is:  "did the deployment system send the 
signal or is there some un logged fatal error in the broker"? 

Today, we rely on callers of {{Exit}} to log the error before making the call. 
However, this won't always have 100% coverage. It would be good to add a log 
message in {{Exit}} to record that an exit method was invoked explicitly. 

We could also add a signal handler to log when {{SIGTERM}}, {{SIGKILL}} etc. 
are received.

This would make operating Kafka a bit easier.



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