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https://issues.apache.org/jira/browse/HIVE-15621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15891374#comment-15891374
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Prasanth Jayachandran commented on HIVE-15621:
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This is probably required only for codahale metrics used by HS2 and metastore? 
With codahale we still need some bridge to publish to hadoop metrics2. This is 
not required for LLAP since we are directly publishing to hadoop metrics2.

> Use Hive's own JvmPauseMonitor instead of Hadoop's in LLAP
> ----------------------------------------------------------
>
>                 Key: HIVE-15621
>                 URL: https://issues.apache.org/jira/browse/HIVE-15621
>             Project: Hive
>          Issue Type: Task
>          Components: llap
>    Affects Versions: 2.2.0
>            Reporter: Wei Zheng
>            Assignee: Wei Zheng
>             Fix For: 2.2.0
>
>         Attachments: HIVE-15621.1.patch, HIVE-15621.2.patch, 
> HIVE-15621.3.patch, HIVE-15621.4.patch
>
>
> This is to avoid dependency on Hadoop's JvmPauseMonitor since Hive already 
> has its own implementation. HiveServer2 is already using Hive's .
> Need to follow up in HIVE-15644 to add the 3 missing JVM metrics for LLAP.



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