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https://issues.apache.org/jira/browse/HDFS-17655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17894723#comment-17894723
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ASF GitHub Bot commented on HDFS-17655:
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eubnara opened a new pull request, #7141:
URL: https://github.com/apache/hadoop/pull/7141
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### Description of PR
When I use `BlockPlacementPolicyWithNodeGroup`, I cannot run balancer.
It is a side effect of
[HDFS-15363](https://github.com/apache/hadoop/commit/4d22d1c58f0eb093775f0fe4f39ef4be639ad752#diff-5061be3a0dafabfb0cf814c4e36ebba51cf665e659467802edc32f0d44e2a335R49-R53).
### How was this patch tested?
Manual test.
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
> Cannot run HDFS balancer with BlockPlacementPolicyWithNodeGroup
> ---------------------------------------------------------------
>
> Key: HDFS-17655
> URL: https://issues.apache.org/jira/browse/HDFS-17655
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover
> Reporter: YUBI LEE
> Priority: Major
> Attachments: HDFS-17655.patch
>
>
> {code}
> 24/10/30 14:57:20 ERROR balancer.Balancer: Exiting balancer due an exception
> java.lang.IllegalArgumentException: Configured cluster topology should be
> org.apache.hadoop.net.NetworkTopologyWithNodeGroup
> {code}
> When {{checkReplicationPolicyCompatibility()}} called on Balancer.java, above
> error has been occurred.
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