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https://issues.apache.org/jira/browse/HDDS-609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16647225#comment-16647225
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Arpit Agarwal commented on HDDS-609:
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+1 pending Jenkins.
> On restart, SCM does not exit chill mode as it expects DNs to report
> containers in ALLOCATED state
> --------------------------------------------------------------------------------------------------
>
> Key: HDDS-609
> URL: https://issues.apache.org/jira/browse/HDDS-609
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Reporter: Namit Maheshwari
> Assignee: Hanisha Koneru
> Priority: Major
> Attachments: HDDS-609.001.patch, HDDS-609.002.patch,
> HDDS-609.003.patch
>
>
> Note: Updated the description to describe the root cause of the bug and moved
> the error logs to comments.
> On restart, SCM can exit chill mode only if it receives report of 99%
> (default) of containers from the DNs.
> SCM includes containers in ALLOCATED state in calculating the total number of
> containers. But since ALLOCATED containers are not reported by DNs, the
> calculation of percentage of reported containers is misconstrued.
> {code:java}
> For example, say we have 1DN in the cluster and we restart SCM.
> Total number of containers in SCM ContainerMap = 20
> Containers in OPEN state = 2
> Containers in ALLOCATED state = 18
> Containers reported by DN on SCM restart = 2
> Fraction of reported containers as calculated by SCMChillNodeManager = (2/20)
> = 0.10
> {code}
> We should not include the ALLOCATED containers while calculating the total
> number of containers for chill mode exit rule. Otherwise, for scenarios such
> as above, SCM can never come out of chill mode.
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