[
https://issues.apache.org/jira/browse/HADOOP-3988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12624407#action_12624407
]
Allen Wittenauer commented on HADOOP-3988:
------------------------------------------
Steve's comment reminded me of an important detail that is bound to come up
from our experiment! I failed to mention that we set the TTL for the DNS CNAME
to be an extremely low value (5 minutes) in the DNS zone. We knew (and tested
to make sure) that on the DNS side, the address change would be handled
properly.
> The elephant should remember names, not numbers.
> ------------------------------------------------
>
> Key: HADOOP-3988
> URL: https://issues.apache.org/jira/browse/HADOOP-3988
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.17.2
> Reporter: Allen Wittenauer
>
> The name node and the data node should not cache the resolution of host
> names, as doing so prevents the use of DNS CNAMEs for any sort of fail over
> capability.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
