There's a lot going on in that log file. It makes it difficult to tell what *the* issue is. You have lots of nodes leaving (and joining) the cluster, including server nodes. You have lost partitions and long JVM pauses. I suspect the real cause of this node shutting down was that it became segmented.
Chances are the issue is either a genuine network issue or the long JVM pauses -- which means that the nodes are not talking to each other -- caused the cluster to fall apart.
