[jira] [Resolved] (IMPALA-5997) Provide a way to gracefully shutdown an Impala Daemon

["Greg Rahn (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-5997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Greg Rahn resolved IMPALA-5997.
-------------------------------
    Resolution: Duplicate

Closing as a duplicate of IMPALA-1760

> Provide a way to gracefully shutdown an Impala Daemon
> -----------------------------------------------------
>
>                 Key: IMPALA-5997
>                 URL: https://issues.apache.org/jira/browse/IMPALA-5997
>             Project: IMPALA
>          Issue Type: New Feature
>            Reporter: Quanlong Huang
>
> Currently if we shutdown an impalad, queries running on it will all fail. This is bad in a BI system integrating with Impala as its query engine. If we perform maintenance on the impala cluster, we hope users are not aware of it. For example, to decomission impalads in a rack to retire old machines, we hope these impalads not accept new PlanFragments and shutdown when their existing work is done. 
> [Presto|https://prestodb.io/] provides such a way since 0.128: https://prestodb.io/docs/current/release/release-0.128.html
> * Presto workers can be instructed to shutdown by submiting a PUT request to /v1/info/state with the body "SHUTTING_DOWN". Once instructed to shutdown, the worker will no longer receive new tasks, and will exit once all existing tasks have completed.
> Hope we can provide a way to do so.



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