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https://issues.apache.org/jira/browse/YARN-9809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17139451#comment-17139451
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Jim Brennan commented on YARN-9809:
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[~eyang], [~ebadger] changing the behavior of health-check scripts seems pretty
dangerous. We looked into this issue a few years ago, because we had some
cases where the health-check scripts were not installed properly, and some bad
nodes were erroneously reporting healthy status.
Rather than try to change the contract for how health-check scripts behave,
which has been around for a very long time, we instead added a wrapper script
that we ship with hadoop. The wrapper checks that the real health-check script
exists and is executable, and if it's not, it prints an "ERROR" message so the
NM will mark the node unhealthy. If the health-check script is good, we just
exec it.
I agree that changing the handling of health check script output/return value
is beyond the scope of this Jira.
> NMs should supply a health status when registering with RM
> ----------------------------------------------------------
>
> Key: YARN-9809
> URL: https://issues.apache.org/jira/browse/YARN-9809
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Eric Badger
> Assignee: Eric Badger
> Priority: Major
> Attachments: YARN-9809.001.patch, YARN-9809.002.patch,
> YARN-9809.003.patch, YARN-9809.004.patch
>
>
> Currently if the NM registers with the RM and it is unhealthy, it can be
> scheduled many containers before the first heartbeat. After the first
> heartbeat, the RM will mark the NM as unhealthy and kill all of the
> containers.
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