master

Type Members

1. trait LeaderElectable extends AnyRef

   

   Annotations

   @DeveloperApi()

2. trait LeaderElectionAgent extends AnyRef

   

   :: DeveloperApi ::

   :: DeveloperApi ::

   A LeaderElectionAgent tracks current master and is a common interface for all election Agents.

   Annotations

   @DeveloperApi()

3. sealed trait MasterMessages extends Serializable

   

4. abstract class PersistenceEngine extends AnyRef

   

   Allows Master to persist any state that is necessary in order to recover from a failure.

   Allows Master to persist any state that is necessary in order to recover from a failure. The following semantics are required:

   • addApplication and addWorker are called before completing registration of a new app/worker.
   • removeApplication and removeWorker are called at any time. Given these two requirements, we will have all apps and workers persisted, but we might not have yet deleted apps or workers that finished (so their liveness must be verified during recovery).

   The implementation of this trait defines how name-object pairs are stored or retrieved.

   Annotations

   @DeveloperApi()

5. abstract class StandaloneRecoveryModeFactory extends AnyRef

   

   ::DeveloperApi::

   ::DeveloperApi::

   Implementation of this class can be plugged in as recovery mode alternative for Spark's Standalone mode.

   Annotations

   @DeveloperApi()