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From "Tsuyoshi OZAWA (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-2229) Making ContainerId long type
Date Sat, 28 Jun 2014 04:15:25 GMT
Tsuyoshi OZAWA created YARN-2229:

             Summary: Making ContainerId long type
                 Key: YARN-2229
                 URL: https://issues.apache.org/jira/browse/YARN-2229
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Tsuyoshi OZAWA
            Assignee: Tsuyoshi OZAWA

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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