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https://issues.apache.org/jira/browse/ACCUMULO-1454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Keith Turner updated ACCUMULO-1454:
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Attachment: ACCUMULO-1454-proposal-01.html
ACCUMULO-1454-proposal-01.adoc
Attached a design doc based on discussion on issue so far. I can post design
doc on RB if anyone has feedback.
> Need good way to perform a rolling restart of all tablet servers
> ----------------------------------------------------------------
>
> Key: ACCUMULO-1454
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1454
> Project: Accumulo
> Issue Type: Improvement
> Components: tserver
> Affects Versions: 1.4.3, 1.5.0
> Reporter: Mike Drob
> Attachments: ACCUMULO-1454-proposal-01.adoc,
> ACCUMULO-1454-proposal-01.html
>
>
> When needing to change a tserver parameter (e.g. java heap space) across the
> entire cluster, there is not a graceful way to perform a rolling restart.
> The naive approach of just killing tservers one at a time causes a lot of
> churn on the cluster as tablets move around and zookeeper tries to maintain
> current state.
> Potential solutions might be via a fancy fate operation, with coordination by
> the master. Ideally, the master would know which servers are 'safe' to
> restart and could minimize overall impact during the operation.
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