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https://issues.apache.org/jira/browse/YARN-7973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16414306#comment-16414306
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Eric Yang commented on YARN-7973:
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[[email protected]] Sorry, I am not clear about the design of container
relaunch feature. In what scenario is container relaunch used?
At this time, if a container is finished or error out, a new instance of the
component is launched to replace the existing one. The new container will have
a new container id. I don't see code to help container relaunch on the same
node of previous instance of the same container in the current patch. In
addition, what would happen if the intermediate state of the container is
preventing relaunch to run successfully?
> Support ContainerRelaunch for Docker containers
> -----------------------------------------------
>
> Key: YARN-7973
> URL: https://issues.apache.org/jira/browse/YARN-7973
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Shane Kumpf
> Assignee: Shane Kumpf
> Priority: Major
> Attachments: YARN-7973.001.patch, YARN-7973.002.patch
>
>
> Prior to YARN-5366, {{container-executor}} would remove the Docker container
> when it exited. The removal is now handled by the
> {{DockerLinuxContainerRuntime}}. {{ContainerRelaunch}} is intended to reuse
> the workdir from the previous attempt, and does not call {{cleanupContainer}}
> prior to {{launchContainer}}. The container ID is reused as well. As a
> result, the previous Docker container still exists, resulting in an error
> from Docker indicating the a container by that name already exists.
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