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https://issues.apache.org/jira/browse/CASSANDRA-10408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Carl Yeksigian resolved CASSANDRA-10408.
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Resolution: Duplicate
Thank you for the detailed bug report!
This was the root cause of CASSANDRA-10382, and was fixed in that ticket.
> NodeProbe (NodeTool) getEndpoint always return null
> ---------------------------------------------------
>
> Key: CASSANDRA-10408
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10408
> Project: Cassandra
> Issue Type: Bug
> Components: Tools
> Reporter: amnon heiman
> Priority: Minor
>
> The NodeProbe getEndpoint implementation was changed to use the
> getHostIdToEndpoint map with the host id.
> There is a confusion between the keys and value. The search here should have
> been a reverse lookup - in the map the host ids are the values not the keys.
> The end result is that getEndpoint() will always return null, as a result
> getDataCenter will be call the EndpointSnitchInfo getDatacenter with null,
> which will be equivalent to call it with the loopback address, in that case
> either fix the getEndpoint implementation, or drop it completely and use the
> loopback address to begin with.
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