[jira] [Commented] (AMBARI-13723) Express Upgrade: HDP 2.1->2.3 must uninstall 2.1 bits before starting on 2.3

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

    [ https://issues.apache.org/jira/browse/AMBARI-13723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14991050#comment-14991050 ] 

Hudson commented on AMBARI-13723:
---------------------------------

FAILURE: Integrated in Ambari-branch-2.1 #802 (See [https://builds.apache.org/job/Ambari-branch-2.1/802/])
AMBARI-13723. Express Upgrade: HDP 2.1->2.3 must uninstall 2.1 bits (afernandez: [http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=1f5545766fd619c277fd830ec6f48e4d74035e42])
* ambari-server/src/main/resources/custom_actions/scripts/remove_bits.py
* ambari-server/src/main/resources/stacks/HDP/2.1/upgrades/nonrolling-upgrade-2.3.xml


> Express Upgrade: HDP 2.1->2.3 must uninstall 2.1 bits before starting on 2.3
> ----------------------------------------------------------------------------
>
>                 Key: AMBARI-13723
>                 URL: https://issues.apache.org/jira/browse/AMBARI-13723
>             Project: Ambari
>          Issue Type: Story
>          Components: ambari-server
>    Affects Versions: 2.2.0, 2.1.3
>            Reporter: Alejandro Fernandez
>            Assignee: Alejandro Fernandez
>             Fix For: 2.2.0, 2.1.3
>
>         Attachments: AMBARI-13723.trunk.patch
>
>
> We found a major flaw in the Express Upgrade from 2.1->2.3. Basically, "hadoop" bin still points to the old binary because we had to install HDP 2.3 while 2.1 bits still existed.
> *Manual Upgrade Instructions:*
> * Stop all services using 2.1
> * yum erase hadoop hdfs hive … (this will remove scripts /usr/bin/hadoop, /usr/bin/hdfs, /usr/bin/hive, etc/)
> * yum install hadoop_2_3_* hdfs_2_3_* hive_2_3_* (rpm should point /usr/bin/hadoop -> /usr/hdp/current/hadoop-client/bin/hadoop)
> * Change the version to 2.3 (hdp-select, conf-select, etc.)
> * Start all services, and hence MR Service Check passes with "hadoop" command
> *Express Upgrade:*
> * Install HDP 2.3 bits. We reused the RU framework that relies on a 2 step process: install bits, perform upgrade. Hence, /usr/bin/hadoop is still using 2.1 bits
> * Stop all services using 2.1
> * Change the version to 2.3 (hdp-select, conf-select, etc.)
> * Start all services, will fail on MR Service Check because ExecuteHadoop() resource calls "hadoop" command, which is still pointing to 2.1 bits!
> One solution is for the orchestration to remove the 2.1 bits before starting using 2.3.
> Uninstalling the 2.1 bits will remove /usr/bin/hadoop, but when we call "hdp-select set hadoop-client <new_version>" it will create the symlink /usr/bin/hadoop -> /usr/hdp/current/hadoop-client/bin/hadoop



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