devaraj-kavali commented on issue #19616: [SPARK-22404][YARN] Provide an option to use unmanaged AM in yarn-client mode URL: https://github.com/apache/spark/pull/19616#issuecomment-457699449 > That explains the YARN side of things. What about the Spark side of things? What will the user see? Is it clear to the user that the context is now unusable because the YARN app is not running anymore? > > Or will they get weird errors because of executors not being allocated and things like that? It gives an error log from YarnClientSchedulerBackend that `YARN application has exited unexpectedly with state FAILED!...` and shows the user that `(No active SparkContext.)` when try to access, and no additional errors, the behavior is similar to application failed in yarn-client mode without unmanaged am enabled.
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