[jira] [Commented] (AMBARI-10568) Rolling Restart: batch size is fixed and cannot be changed

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

    [ https://issues.apache.org/jira/browse/AMBARI-10568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14499886#comment-14499886 ] 

Andrii Babiichuk commented on AMBARI-10568:
-------------------------------------------

+1 for the patch

> Rolling Restart: batch size is fixed and cannot be changed
> ----------------------------------------------------------
>
>                 Key: AMBARI-10568
>                 URL: https://issues.apache.org/jira/browse/AMBARI-10568
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-web
>    Affects Versions: 2.1.0
>            Reporter: Aleksandr Kovalenko
>            Assignee: Aleksandr Kovalenko
>             Fix For: 2.1.0
>
>         Attachments: AMBARI-10568.patch
>
>
> Let the user set the batch size for datanodes > # of slaves and don't show the warning. If they do, it just restarts all. Always recommend "1", and if greater than 1 is entered, show the new warning "Restarting more than one DataNode at a time is not recommended. Doing so can lead to data unavailability and/or possible loss of data being actively written to HFDS".



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