Jason Gustafson created KAFKA-9347:
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             Summary: Detect deleted log directory before becoming leader
                 Key: KAFKA-9347
                 URL: https://issues.apache.org/jira/browse/KAFKA-9347
             Project: Kafka
          Issue Type: Improvement
            Reporter: Jason Gustafson


There is no protection currently if a broker has had its log directory deleted 
to prevent it from becoming the leader of a partition that it still remains in 
the ISR of. This scenario can happen when the last remaining replica in the ISR 
is shutdown. It will remain in the ISR and be eligible for leadership as soon 
as it starts up. It would be useful to either detect this case situation 
dynamically in order to force the user to do an unclean election or recover 
another broker. One option might be just to pass a flag on startup to specify 
that a broker should not be eligible for leadership. 



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