[jira] [Created] (AMBARI-17280) RU to write out client configs that are dependencies of Hive, ATS, and Oozie during upgrades that change configs

["Alejandro Fernandez (JIRA)" <ji...@apache.org>]

Alejandro Fernandez created AMBARI-17280:
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             Summary: RU to write out client configs that are dependencies of Hive, ATS, and Oozie during upgrades that change configs
                 Key: AMBARI-17280
                 URL: https://issues.apache.org/jira/browse/AMBARI-17280
             Project: Ambari
          Issue Type: Bug
          Components: stacks
    Affects Versions: 2.2.0
            Reporter: Alejandro Fernandez
            Priority: Critical
             Fix For: 2.4.0


During RU, HiveServer2 is restarted but the newer tez configs have not yet been saved, which is incorrect because Hive has a dependency on Tez.

This is important when configs change during a major stack upgrade, e.g., HDP 2.4 -> 2.5. What happens today is,

* Install packages generates /etc/tez/2.5.0.0-1/0 and copies the configs from /etc/tez/2.4.0.0-1/0/ to the new folder
* If configs change during RU, then Hive is restarted and the classpath means that it will pick up the older tez configs from the new /etc/tez/2.5.0.0-1/0 folder

This problem exists for all of these components:
HiveServer: depends on Tez and MapReduce clients
ATS: depends on Tez and Spark clients
Oozie: depends on Tez, Spark, and MapReduce clients

This problem only exists when configs change (so crossing major stack version) and during RU (because it is allowed to change configs during the middle of restarting services).



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