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https://issues.apache.org/jira/browse/HDFS-16984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17774317#comment-17774317
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Ke Han commented on HDFS-16984:
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[~ayushtkn] Hi Ayush, I have identified the root cause and submitted a PR to
fix this problem. Any suggestions are appreciated!
> Directory timestamp lost during the upgrade process
> ---------------------------------------------------
>
> Key: HDFS-16984
> URL: https://issues.apache.org/jira/browse/HDFS-16984
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs
> Affects Versions: 2.10.2, 3.3.6
> Reporter: Ke Han
> Priority: Major
> Labels: pull-request-available
> Attachments: GUBIkxOc.tar.gz
>
>
> h1. Symptoms
> The access timestamp for a directory is lost after the upgrading from HDFS
> cluster 2.10.2 to 3.3.6.
> h1. Reproduce
> Start up a four-node HDFS cluster in 2.10.2 version.
> Execute the following commands. (The client is started up in NN, We have
> minimized the command sequence for reproducing)
> {code:java}
> bin/hdfs dfs -mkdir /GUBIkxOc
> bin/hdfs dfs -put -f -p -d /tmp/upfuzz/hdfs/GUBIkxOc/bQfxf /GUBIkxOc/
> bin/hdfs dfs -mkdir /GUBIkxOc/sKbTRjvS{code}
> Perform read in the old version
> {code:java}
> bin/hdfs dfs -ls -t -r -u /GUBIkxOc/
> Found 2 items
> drwxr-xr-x - root supergroup 0 1970-01-01 00:00 /GUBIkxOc/sKbTRjvS
> drwxr-xr-x - 20001 998 0 2023-04-17 16:15
> /GUBIkxOc/bQfxf{code}
> Then perform a full-stop upgrade to upgrade the entire cluster to 3.3.6.
> (Follow upgrade procedure in the website: (1) enter safemode (2) rolling
> upgrade prepare (3) exit from safe mode). When all nodes in new version have
> started up, we perform the same read:
> {code:java}
> Found 2 items
> drwxr-xr-x - 20001 998 0 1970-01-01 00:00 /GUBIkxOc/bQfxf
> drwxr-xr-x - root supergroup 0 1970-01-01 00:00
> /GUBIkxOc/sKbTRjvS {code}
> The access timestamp info of directory /GUBIkxOc/bQfxf is lost. It changes
> from 2023-04-17 16:15 to 1970-01-01 00:00.
> PS: The prepare upgrade must happen after the commands have been executed.
> I have also attached the required file: +/tmp/upfuzz/hdfs/GUBIkxOc/bQfxf+ .
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