[jira] [Commented] (IMPALA-9930) Introduce new admission control rpc service

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-9930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17265774#comment-17265774 ] 

ASF subversion and git services commented on IMPALA-9930:
---------------------------------------------------------

Commit 91adb33b22eb132b80091742c631e627058c9984 in impala's branch refs/heads/master from Thomas Tauber-Marshall
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=91adb33 ]

IMPALA-9975 (part 2): Introduce new admission control daemon

A recent patch (IMPALA-9930) introduces a new admission control rpc
service, which can be configured to perform admission control for
coordinators. In that patch, the admission service runs in an impalad.

This patch separates the service out to run in a new daemon, called
the admissiond. It also integrates this new daemon with the build
infrastructure around Docker.

Some notable changes:
- Adds a new class, AdmissiondEnv, which performs the same function
  for the admissiond as ExecEnv does for impalads.
- The '/admission' http endpoint is exposed on the admissiond's webui
  if the admission control service is in use, otherwise it is exposed
  on coordinator impalad's webuis.
- start-impala-cluster.py takes a new flag --enable_admission_service
  which configures the minicluster to have an admissiond with all
  coordinators using it for admission control.
- Coordinators are now configured to use the admission service by
  specifying the startup flag --admission_service_host. This is
  intended to mirror the configuration of the statestored/catalogd
  location.

Testing:
- Existing tests for the admission control serivce are modified to run
  with an admissiond.
- Manually ran start-impala-cluster.py with --enable_admission_service
  and --docker_network to verify Docker integration.

Change-Id: Id677814b31e9193035e8cf0d08aba0ce388a0ad9
Reviewed-on: http://gerrit.cloudera.org:8080/16891
Reviewed-by: Impala Public Jenkins <im...@cloudera.com>
Tested-by: Impala Public Jenkins <im...@cloudera.com>


> Introduce new admission control rpc service
> -------------------------------------------
>
>                 Key: IMPALA-9930
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9930
>             Project: IMPALA
>          Issue Type: Sub-task
>          Components: Backend
>    Affects Versions: Impala 4.0
>            Reporter: Thomas Tauber-Marshall
>            Assignee: Thomas Tauber-Marshall
>            Priority: Major
>             Fix For: Impala 4.0
>
>
> In order to support the eventual single admission controller, we'll need to create rpc definitions for the service.
> The rpcs that will need to be defined are outlined in the design doc:
> https://docs.google.com/document/d/1nLovzk4rwZLct2yl-eT7VMHFBP7LswcJp7RqiP59RAc/edit



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