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https://issues.apache.org/jira/browse/HADOOP-18365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17582054#comment-17582054
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ASF GitHub Bot commented on HADOOP-18365:
-----------------------------------------
snmvaughan opened a new pull request, #4768:
URL: https://github.com/apache/hadoop/pull/4768
Back port to branch-3.3, to avoid reconnecting to the old address after
detecting that the address has been updated.
* Use a stable hashCode to allow safe IP addr changes
* Add test that updated address is used
Once the address has been updated, it will be used in future calls. Test
verifies that a second request succeeds and that it uses the existing updated
address instead of having to re-resolve.
### For code changes:
- [X] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
> Updated addresses are still accessed using the old IP address
> -------------------------------------------------------------
>
> Key: HADOOP-18365
> URL: https://issues.apache.org/jira/browse/HADOOP-18365
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Affects Versions: 3.4.0, 3.3.9
> Environment: Demonstrated in a Kubernetes environment running Java 11.
> Reporter: Steve Vaughan
> Assignee: Steve Vaughan
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> When the IPC Client recognizes that an IP address has changed, it updates the
> server field and logs a message:
> Address change detected. Old:
> journalnode-1.journalnode.hdfs.svc.cluster.local/10.1.0.178:8485 New:
> journalnode-1.journalnode.hdfs.svc.cluster.local/10.1.0.182:8485
> Although the change is detected, the client will continue to connect to the
> old IP address, resulting in repeated log messages. This is seen in managed
> environments when JournalNode syncing is enabled and a JournalNode is
> restarted, with the remaining nodes in the set repeatedly logging this
> message when syncing to the restarted JournalNode.
> The source of the problem is that the remoteId.address is not updated.
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