some additional logs I found in jobManager. 2016-11-25 07:19:57,958 WARN akka.remote.RemoteWatcher - Detected unreachable: [akka.tcp://flink@10.17.123.56:59247] 2016-11-25 07:19:57,962 INFO org.apache.flink.runtime.jobmanager.JobManager - Task manager akka.tcp://flink@10.17.123.56:59247/user/taskmanager terminated.
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