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Mandatory Pre-requisite

Upgrade JDK from 1.7 to 1.8

If the step is missed it will result in to below errors.

  • Nodemanager will fail to start if spark shuffle service is enabled.

"java.lang.UnsupportedClassVersionError: org/apache/spark/network/yarn/YarnShuffleService : Unsupported major.minor version 52.0"

  • Hive Metastore will fail to start.

"Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/hadoop/hive/ql/log/NullAppender : Unsupported major.minor version 52.0"

  • Service checks will fail.
    • Yarn
    • Hive

Finalize upgrade will fail and cluster have to be downgraded.

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