Chao Sun created SPARK-33212:
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Summary: Move to shaded clients for Hadoop 3.x profile
Key: SPARK-33212
URL: https://issues.apache.org/jira/browse/SPARK-33212
Project: Spark
Issue Type: Improvement
Components: Spark Core, Spark Submit, SQL, YARN
Affects Versions: 3.0.1
Reporter: Chao Sun
Hadoop 3.x+ offers shaded client jars: hadoop-client-api and
hadoop-client-runtime, which shade 3rd party dependencies such as Guava,
protobuf, jetty etc. This Jira switches Spark to use these jars instead of
hadoop-common, hadoop-client etc. Benefits include:
* It unblocks Spark from upgrading to Hadoop 3.2.2/3.3.0+. The newer versions
of Hadoop have migrated to Guava 27.0+ and in order to resolve Guava conflicts,
Spark depends on Hadoop to not leaking dependencies.
* It makes Spark/Hadoop dependency cleaner. Currently Spark uses both
client-side and server-side Hadoop APIs from modules such as hadoop-common,
hadoop-yarn-server-common etc. Moving to hadoop-client-api allows use to only
use public/client API from Hadoop side.
* Provides a better isolation from Hadoop dependencies. In future Spark can
better evolve without worrying about dependencies pulled from Hadoop side
(which used to be a lot).
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