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https://issues.apache.org/jira/browse/HADOOP-16543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16927082#comment-16927082
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Roger Liu commented on HADOOP-16543:
------------------------------------
Sure thing
> Cached DNS name resolution error
> --------------------------------
>
> Key: HADOOP-16543
> URL: https://issues.apache.org/jira/browse/HADOOP-16543
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.1.2
> Reporter: Roger Liu
> Priority: Major
>
> In Kubernetes, the a node may go down and then come back later with a
> different IP address. Yarn clients which are already running will be unable
> to rediscover the node after it comes back up due to caching the original IP
> address. This is problematic for cases such as Spark HA on Kubernetes, as the
> node containing the resource manager may go down and come back up, meaning
> existing node managers must then also be restarted.
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