You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@ambari.apache.org by "Alejandro Fernandez (JIRA)" <ji...@apache.org> on 2016/10/18 00:32:58 UTC
[jira] [Created] (AMBARI-18619) Optimize Service Checks to it picks
a random host and prefers hosts with 0 active commands
Alejandro Fernandez created AMBARI-18619:
--------------------------------------------
Summary: Optimize Service Checks to it picks a random host and prefers hosts with 0 active commands
Key: AMBARI-18619
URL: https://issues.apache.org/jira/browse/AMBARI-18619
Project: Ambari
Issue Type: Bug
Components: ambari-server
Affects Versions: 2.4.0
Reporter: Alejandro Fernandez
Assignee: Alejandro Fernandez
Priority: Critical
Fix For: 2.5.0
STR:
* Deploy a 3-node cluster with Ambari 2.4 and HDP 2.5 with clients on every host.
* Run multiple service checks in parallel, but notice that they typically run on the same 1 or 2 hosts.
Currently, Ambari relies on getting the list of candidate hosts from the DB and excludes all hosts that are in maintenance mode. From that list, it picks the first host that is healthy (i.e., heartbeating). This means that the logic does not pick a random host.
Instead, Ambari should always pick a random host and prefer to schedule on hosts that have 0 in-progress commands.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)