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From "Anubhav Dhoot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-1372) Ensure all completed containers are reported to the AMs across RM restart
Date Fri, 08 Aug 2014 07:28:12 GMT

     [ https://issues.apache.org/jira/browse/YARN-1372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Anubhav Dhoot updated YARN-1372:
--------------------------------

    Attachment: YARN-1372.prelim2.patch

Second patch uploaded that adds expiration to the entries in NM
getContainersToCleanup is used to remove containers currently. Not sure how we can resuse
it for acking the containers are notified to AM. Are you saying first time a containerId is
in that list, its for removing it and the next time its used to ack the AM has received it?


> Ensure all completed containers are reported to the AMs across RM restart
> -------------------------------------------------------------------------
>
>                 Key: YARN-1372
>                 URL: https://issues.apache.org/jira/browse/YARN-1372
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Bikas Saha
>            Assignee: Anubhav Dhoot
>         Attachments: YARN-1372.prelim.patch, YARN-1372.prelim2.patch
>
>
> Currently the NM informs the RM about completed containers and then removes those containers
from the RM notification list. The RM passes on that completed container information to the
AM and the AM pulls this data. If the RM dies before the AM pulls this data then the AM may
not be able to get this information again. To fix this, NM should maintain a separate list
of such completed container notifications sent to the RM. After the AM has pulled the containers
from the RM then the RM will inform the NM about it and the NM can remove the completed container
from the new list. Upon re-register with the RM (after RM restart) the NM should send the
entire list of completed containers to the RM along with any other containers that completed
while the RM was dead. This ensures that the RM can inform the AM's about all completed containers.
Some container completions may be reported more than once since the AM may have pulled the
container but the RM may die before notifying the NM about the pull.



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