Thrown when a paritioned region is configured for disk persistence, and part of the data is
stored on members that are known to be offline.
With a partitioned region, the keyspace is segmented into buckets which are assigned to
individual members. If all members that are storing data for a particular bucket are offline, any
attempt to access or update data in that bucket will throw this exception.
If you see this exception, that means that you need to restart the members that host the missing
If you receive this exception when attempting an operation that modifies the region (such as a
put), it is possible that the change was actually persisted to disk before the member went