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https://issues.apache.org/jira/browse/HDFS-17164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18030206#comment-18030206
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ASF GitHub Bot commented on HDFS-17164:
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github-actions[bot] closed pull request #5974: HDFS-17164. During rolling
upgrade, datanode should copy-on-append when bumpReplicaGS.
URL: https://github.com/apache/hadoop/pull/5974
> During rolling upgrade, datanode should copy-on-append when bumpReplicaGS
> -------------------------------------------------------------------------
>
> Key: HDFS-17164
> URL: https://issues.apache.org/jira/browse/HDFS-17164
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode, rolling upgrades
> Reporter: Tsz-wo Sze
> Assignee: Tsz-wo Sze
> Priority: Major
> Labels: pull-request-available
>
> During rolling upgrade, datanode create a trash directory for each block
> pool. Then a block deletion becomes moving the block to trash.
> For bumpReplicaGS, it will rename the meta file and then continue writing to
> the block file. It should copy the original block file and the original meta
> file to trash in order to support rollback.
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