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From "Sandor Magyari (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-14665) Race condition problem in ServiceComponentHostImpl when provisioning cluster with Blueprint
Date Fri, 15 Jan 2016 17:49:39 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-14665?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sandor Magyari updated AMBARI-14665:
------------------------------------

Patch submitted for review: https://reviews.apache.org/r/42307/

> Race condition problem in ServiceComponentHostImpl when provisioning cluster with Blueprint
> -------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-14665
>                 URL: https://issues.apache.org/jira/browse/AMBARI-14665
>             Project: Ambari
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>            Reporter: Sandor Magyari
>            Assignee: Sandor Magyari
>             Fix For: 2.2.1
>
>         Attachments: AMBARI-14665.patch
>
>
> Sometimes when provisioning cluster with Blueprint, there are state inconsistencies between
state and desired_state of components on a given host. Usually desired_state is still INSTALLED
while state is STARTED.
> Analyzing the logs of affected components, the problem seems to be a race condition in
ServiceComponentHostImpl. This is modified by ActionScheduler, HeartBeatMonitor and HostComponentResourceProvider
as well which is used when creating INSTALL and START tasks, modifying desired states.
> ServiceComponentHostImpl state is stored in two entities: HostComponentStateEntity, HostComponentDesiredStateEntity.
Regardless of changes made both entities are merged back to db but only one is fetched from
db before merge.



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