Tsuyoshi OZAWA created YARN-2229:
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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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