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https://issues.apache.org/jira/browse/STORM-3679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ethan Li reassigned STORM-3679:
-------------------------------
Assignee: Ethan Li
> misuse of nodeId as hostname in LoadAwareShuffleGrouping
> --------------------------------------------------------
>
> Key: STORM-3679
> URL: https://issues.apache.org/jira/browse/STORM-3679
> Project: Apache Storm
> Issue Type: Bug
> Affects Versions: 2.0.0, 2.1.0, 2.2.0
> Reporter: Ethan Li
> Assignee: Ethan Li
> Priority: Major
>
>
> LoadAwareShuffleGrouping misuses nodeId as the hostname and it causes
> consistent invalid DNS queries for "hostnames" like
> 2a1f2cf3-c701-4621-9e93-640b4e63be48-<ip>.
> This causes excessive unnecessary loads on nscd and DNS. Also because of this
> bug, every target tasks will be treated as at least RACK_LOCAL because if an
> ip address can't be determined, YahooDNSToSwitchMapping treats it as
> DEFAULT_RACK. This doesn't impact WORKER_LOCAL and HOST_LOCAL though.
>
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