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https://issues.apache.org/jira/browse/YARN-9809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17138892#comment-17138892
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Eric Badger commented on YARN-9809:
-----------------------------------
{noformat:title=NodeHealthScriptRunner.newInstance()}
if (!shouldRun(scriptName, nodeHealthScript)) {
return null;
}
{noformat}
{noformat:title=NodeHealthScriptRunner.shouldRun()}
static boolean shouldRun(String script, String healthScript) {
if (healthScript == null || healthScript.trim().isEmpty()) {
LOG.info("Missing location for the node health check script \"{}\".",
script);
return false;
}
{noformat}
If the health check script doesn't exist, then the health {{shouldRun}} will
return false and the {{newInstance}} will return null. This will cause the
health reporter to not be added as a service. So at the end of the day, your
statement is correct. If the health check script doesn't exist, the node will
report as healthy.
> 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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