[jira] [Work logged] (HDFS-16376) Expose metrics of NodeNotChosenReason to JMX

Thu, 09 Dec 2021 07:58:06 -0800 


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https://issues.apache.org/jira/browse/HDFS-16376?focusedWorklogId=693356&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-693356
 ]

ASF GitHub Bot logged work on HDFS-16376:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 09/Dec/21 15:57
            Start Date: 09/Dec/21 15:57
    Worklog Time Spent: 10m 
      Work Description: tomscut opened a new pull request #3778:
URL: https://github.com/apache/hadoop/pull/3778


   JIRA: [HDFS-16376](https://issues.apache.org/jira/browse/HDFS-16376).
   
   In our cluster, we can see logs for nodes that are not chosen. But it's hard 
to see the percentages in each reason from the logs. It is best to add relevant 
metrics to monitor the entire cluster.
   
   
![image](https://user-images.githubusercontent.com/55134131/145429562-88b28729-4486-44fd-8d47-09b6a5c94864.png)
   
   JMX metrics:
   
![block-placement-metrics](https://user-images.githubusercontent.com/55134131/145430372-d0282da3-586e-443a-87b9-7a079f31c675.jpg)
   


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Issue Time Tracking
-------------------

            Worklog Id:     (was: 693356)
    Remaining Estimate: 0h
            Time Spent: 10m

> Expose metrics of NodeNotChosenReason to JMX
> --------------------------------------------
>
>                 Key: HDFS-16376
>                 URL: https://issues.apache.org/jira/browse/HDFS-16376
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: tomscut
>            Assignee: tomscut
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: image-2021-12-09-23-48-42-865.png, 
> image-2021-12-09-23-55-29-017.png
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In our cluster, we can see logs for nodes that are not chosen. But it's hard 
> to see the percentages in each reason from the logs. It is best to add 
> relevant metrics to monitor the entire cluster.
> !image-2021-12-09-23-48-42-865.png|width=517,height=187!
> !image-2021-12-09-23-55-29-017.png|width=620,height=152!



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