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https://issues.apache.org/jira/browse/HDFS-17686?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ke Han updated HDFS-17686:
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Attachment: pVfezjff.tar.gz
> Inconsistent read results when upgrading cluster from 3.2.4 to 3.4.1
> --------------------------------------------------------------------
>
> Key: HDFS-17686
> URL: https://issues.apache.org/jira/browse/HDFS-17686
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 3.2.4, 3.4.1
> Reporter: Ke Han
> Priority: Major
> Attachments: pVfezjff.tar.gz
>
>
> h1. Symptoms
> When migrating HDFS cluster from 3.2.4 to 3.4.1, I observed that the
> modification time of my folder can be inconsistent after the upgrade process.
> h1. Reproduce
> This can be reproduced deterministically with the following steps
> Step1: Put the folder pVfezjff (attached) under tmp
> Step2: Start up HDFS cluster 3.2.4 (1NN, 1SNN, 1DN), execute the following
> commands
> {code:java}
> dfs -touchz /qxcKOnNw/ZtbuVsPJYFCsuPBrpE.txt
> dfs -touchz /qxcKOnNw/ZtbuVsPJYFCsuPBrpE.yaml
> dfs -appendToFile /tmp/upfuzz/hdfs/pVfezjff/ote
> /qxcKOnNw/ZtbuVsPJYFCsuPBrpE.txt
> dfs -cp -f -p -d /qxcKOnNw/ /qxcKOnNw/
> dfs -cp -f /qxcKOnNw/ZtbuVsPJYFCsuPBrpE.yaml /qxcKOnNw/
> dfsadmin -disallowSnapshot /qxcKOnNw/
> dfs -put -f /tmp/upfuzz/hdfs/pVfezjff/fhpetiuf /qxcKOnNw/
> dfsadmin -allowSnapshot /qxcKOnNw/
> dfs -cp -p -d /qxcKOnNw/ /qxcKOnNw/
> dfs -cp -f -p /qxcKOnNw/ /qxcKOnNw/
> dfs -createSnapshot /qxcKOnNw/
> {code}
> Execute a stat command in the old version
> {code:java}
> dfs -stat "%y" /qxcKOnNw/
> "2024-12-06 20:00:02"{code}
> Then stop the entire cluster and upgrade to 3.4.1 (1NN, 1SNN, 1DN), execute
> the same stat command
> {code:java}
> dfs -stat "%y" /qxcKOnNw/
> "2024-12-06 20:00:00"{code}
> The modification time is inconsistent with the one before the upgrade.
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