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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-19721) Use 'llapstatus' command watch mode from HDP 2.6 onwards.
Date Thu, 26 Jan 2017 03:46:26 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-19721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15839136#comment-15839136
] 

Hadoop QA commented on AMBARI-19721:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12849400/AMBARI-19721.patch
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/Ambari-trunk-test-patch/10268//console

This message is automatically generated.

> Use 'llapstatus' command watch mode from HDP 2.6 onwards.
> ---------------------------------------------------------
>
>                 Key: AMBARI-19721
>                 URL: https://issues.apache.org/jira/browse/AMBARI-19721
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.5.0
>            Reporter: Swapan Shridhar
>            Assignee: Swapan Shridhar
>             Fix For: 2.5.0
>
>         Attachments: AMBARI-19721.patch
>
>
> - Till HDP 2.5, Ambari had used *'llapstatus'* command to query LLAP app status and has
wrapped around the retry logic for how many times to query *'llapstatus'* command in order
for LLAP app to reach *RUNNING_ALL* or *RUNNING* with 80 % containers Up.
> - With HDP 2.6, Hive has implemented a watch mode where Ambari doesnt need to have the
retry logic in Ambari itself, and can use the *llapstatus* watch mode. 
> Usage is as follows: (Information provided by [~prasanth_j])
> Following options are added to llap status tool
> *->* -w : Watch mode waits until all LLAP daemons are running or subset of the nodes
are running (threshold can be specified via -r option) (Default wait until all nodes are running)
> *->*-r : When watch mode is enabled (-w), wait until the specified threshold of nodes
are running (Default 1.0 which means 100% nodes are running)
> *->*-i : Amount of time in seconds to wait until subsequent status checks in watch
mode (Default: 1sec)
> *->*-t : Exit watch mode if the desired state is not attained until the specified
timeout (Default: 300sec)
> *Example usage:*
> {code}
> llapstatus -w -i 1 -t 300
> {code}
> The above command waits until all nodes are running with 1 second refresh rate and 300
second timeout (300 max attempts else fail).
> {code}
> llapstatus -w -r 0.8 -i 2 -t 150
> {code}
> The above command waits until 80% of the nodes are running with 2 second refresh rate
and 150 second timeout (75 max attempts else fail).
> {code}
> llapstatus -w -r 0.8 
> {code}
> Use without providing the -i and -t options (Defaults used).



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