sarutak opened a new pull request #28939:
URL: https://github.com/apache/spark/pull/28939
### What changes were proposed in this pull request?
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This PR changes Executor to load jars and files added by --jars and --files
on Executor initialization.
To avoid downloading those jars/files twice, they are assosiated with
`startTime` as their uploaded timestamp.
### Why are the changes needed?
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ExecutorPlugin can't work with Standalone Cluster (maybe with other cluster
manager too except YARN. )
when a jar which contains plugins and files used by the plugins are added by
--jars and --files option with spark-submit.
This is because jars and files added by --jars and --files are not loaded on
Executor initialization.
I confirmed it works with YARN because jars/files are distributed as
distributed cache.
### Does this PR introduce _any_ user-facing change?
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Yes. jars/files added by --jars and --files are downloaded on each executor
on initialization.
### How was this patch tested?
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Added a new testcase.
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