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From "Alejandro Fernandez (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-13723) Express Upgrade: HDP 2.1->2.3 must uninstall 2.1 bits before starting on 2.3
Date Wed, 04 Nov 2015 22:39:28 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-13723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Fernandez updated AMBARI-13723:
-----------------------------------------
    Attachment: AMBARI-13723.trunk.patch

> 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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