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https://issues.apache.org/jira/browse/YARN-2327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe moved HADOOP-10794 to YARN-2327:
-----------------------------------------------------
Key: YARN-2327 (was: HADOOP-10794)
Project: Hadoop YARN (was: Hadoop Common)
> A hadoop cluster needs clock synchronization
> --------------------------------------------
>
> Key: YARN-2327
> URL: https://issues.apache.org/jira/browse/YARN-2327
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Zhijie Shen
>
> As a distributed system, a hadoop cluster wants the clock on all the
> participating hosts synchronized. Otherwise, some problems might happen. For
> example, in YARN-2251, due to the clock on the host for the task container
> falls behind that on the host of the AM container, the computed elapsed time
> (the diff between the timestamps produced on two hosts) becomes negative.
> In YARN-2251, we tried to mask the negative elapsed time. However, we should
> seek for a decent long term solution, such as providing mechanism to do and
> check clock synchronization.
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