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sporadic spark-master shutting down (spark 1.6.0 standalone mode)

sporadic spark-master shutting down (spark 1.6.0 standalone mode)

Explorer

We have issues with spark-master shutting down for unknown reasons, we looked at the spark-master logs and it simply shows this, is there some other log I should be looking at to find out why the master went down?

16/09/05 21:10:00 INFO ClientCnxn: Opening socket connection to server xxx Will not attempt to authenticate using SASL (unknown error)
16/09/05 21:10:00 ERROR Master: Leadership has been revoked -- master shutting down.
16/09/05 21:10:00 INFO ClientCnxn: Socket connection established, initiating session, client: xxx, server: xxx/xxx

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