Start the extension service.
Start the extension service. This should be a no-op if called more than once.
binding to the spark application and YARN
Stop the service
The stop()
operation MUST be idempotent, and succeed even if start()
was
never invoked.
An extension service that can be loaded into a Spark YARN scheduler. A Service that can be started and stopped.
1. For implementations to be loadable by
SchedulerExtensionServices
, they must provide an empty constructor. 2. Thestop()
operation MUST be idempotent, and succeed even ifstart()
was never invoked.