HDP 2.6.3 Upgrade from HDP 2.4.3

[#1]

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.