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https://issues.apache.org/jira/browse/YARN-2229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsuyoshi OZAWA updated YARN-2229:
---------------------------------
Summary: ContainerId can overflow with RM restart (was: Making ContainerId
long type)
> ContainerId can overflow with RM restart
> ----------------------------------------
>
> Key: YARN-2229
> URL: https://issues.apache.org/jira/browse/YARN-2229
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Tsuyoshi OZAWA
> Assignee: Tsuyoshi OZAWA
> Attachments: YARN-2229.1.patch, YARN-2229.2.patch, YARN-2229.2.patch,
> YARN-2229.3.patch, YARN-2229.4.patch, YARN-2229.5.patch
>
>
> On YARN-2052, we changed containerId format: upper 10 bits are for epoch,
> lower 22 bits are for sequence number of Ids. This is for preserving
> semantics of {{ContainerId#getId()}}, {{ContainerId#toString()}},
> {{ContainerId#compareTo()}}, {{ContainerId#equals}}, and
> {{ConverterUtils#toContainerId}}. One concern is epoch can overflow after RM
> restarts 1024 times.
> To avoid the problem, its better to make containerId long. We need to define
> the new format of container Id with preserving backward compatibility on this
> JIRA.
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