Tanguy Leroux 2e37f17a7d
Expose all permits acquisition in IndexShard and TransportReplicationAction (#35540)
This pull request exposes two new methods in the IndexShard and 
TransportReplicationAction classes in order to allow transport replication 
actions to acquire all index shard operation permits for their execution.

It first adds the acquireAllPrimaryOperationPermits() and the 
acquireAllReplicaOperationsPermits() methods to the IndexShard class 
which allow to acquire all operations permits on a shard while exposing 
a Releasable. It also refactors the TransportReplicationAction class to 
expose two protected methods (acquirePrimaryOperationPermit() and 
acquireReplicaOperationPermit()) that can be overridden when a transport 
replication action requires the acquisition of all permits on primary and/or 
replica shard during execution.

Finally, it adds a TransportReplicationAllPermitsAcquisitionTests which
 illustrates how a transport replication action can grab all permits before 
adding a cluster block in the cluster state, making subsequent operations 
that requires a single permit to fail).

Related to elastic #33888
2018-11-23 09:26:38 +01:00
..