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From "Jonathan Hurley (JIRA)" <>
Subject [jira] [Updated] (AMBARI-15419) After EU Some Services Fail To Start Because of Missing JKS Files
Date Tue, 15 Mar 2016 03:42:33 GMT


Jonathan Hurley updated AMBARI-15419:
    Status: Patch Available  (was: Open)

> After EU Some Services Fail To Start Because of Missing JKS Files
> -----------------------------------------------------------------
>                 Key: AMBARI-15419
>                 URL:
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Jonathan Hurley
>            Assignee: Jonathan Hurley
>            Priority: Critical
>             Fix For: 2.2.2
>         Attachments: AMBARI-15419.patch
> During an upgrade, configuration files from the old stack are not copied to the new configuration
folders created using {{conf-select}}. This means that files which Ambari does not track,
are never included in the new configuration directories.
> This is what happens on a clean install:
> {noformat}
> /etc/foo/conf (physical conf files placed here)
> /usr/hdp/<version>/foo/conf -> /etc/foo/conf
> {noformat}
> Ambari then uses {{conf-select}} to change this:
> {noformat}
> /etc/foo/conf.backup (contents of original /etc/foo/conf folder)
> /etc/foo/conf -> /usr/hdp/<version>/foo/conf
> /usr/hdp/<version>/foo/conf -> /etc/foo/<version>/0
> /etc/foo/<version>/0   (physical conf files placed here)
> {noformat}
> But in this scenario, we make sure to seed {{/etc/foo/<version>/0}} with the files
which were in {{/etc/foo/conf}} originally, including files which we don't track. This is
to prevent files, like JKS keystores, from being lost.
> *Now the upgrade scenario:*
> ----
>  If you already have {{/usr/hdp/}} installed, that means that you have {{/etc/foo/conf}}
and all associated files already on the disk. When you distribute HDP 2.4, {{/usr/hdp/}}
is created. However, it cannot overwrite any existing configurations since you haven't upgraded
yet. So, it basically does nothing with the configurations. We invoke {{conf-select}} to create
{{/etc/foo/}}, but it is never seeded with any values from {{/etc/foo/}}.

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