Flushes the highwatermark value for all partitions to the highwatermark file
Initialize the replica manager with the request purgatory
Initialize the replica manager with the request purgatory
TODO: will be removed in 0.9 where we refactor server structure
Read from all the offset details given and return a map of (topic, partition) -> PartitionData
Unblock some delayed fetch requests with the request key
Unblock some delayed produce requests with the request key