Github user sarutak commented on the pull request:
https://github.com/apache/spark/pull/2001#issuecomment-62041692
@tgravescs I meant that in YARN Client mode, user apps runs on the client,
and SparkContext should be stopped by users explicitly.
In other hand, in YARN Cluster mode, user apps runs on a node in the
cluster. In this mode, even if users forget to stop SparkContext,
ApplicationMaster running on the same node with user apps stops SparkContext at
the time of shutdown.
So, I think It's helpful that SparkContext is stopped at the time of
shutdown also in YARN Client mode.
In YARN Client mode, YarnClientClusterScheduler can access SparkContext so
I added the shutdown-hook to stop SparkContext.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
