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https://issues.apache.org/jira/browse/HDFS-17174?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ke Han updated HDFS-17174:
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Summary: Side effect of checksum command: wrongly changes the modification
time of a file (was: Side effects of checksum command: wrongly changes the
modification time of a file)
> Side effect of checksum command: wrongly changes the modification time of a
> file
> --------------------------------------------------------------------------------
>
> Key: HDFS-17174
> URL: https://issues.apache.org/jira/browse/HDFS-17174
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.2.4
> Reporter: Ke Han
> Priority: Major
>
> After starting up 4-nodes hdfs cluster for 3.2.4. I executed some commands to
> put a folder in local fs to hdfs. I used -{_}put -p to preserves access and
> modification times{_}.
> However, when I use -checksum command to retrieve the checksum, I noticed
> that it will change the modification time of the file I just uploaded. (Side
> effects)
> {code:java}
> dfs -mkdir /lSFVKIFi
> dfs -put -f /tmp/upfuzz/hdfs/xbutTMQg/GbkVxPvqoc /lSFVKIFi/
> dfs -mkdir /lSFVKIFi/PWXVE
> dfs -setacl -k -m acl /PWXVE --set acl2 /
> ec -enablePolicy -policy XOR-2-1-1024k
> dfsadmin -setBalancerBandwidth 54480 /lSFVKIFi/
> dfsadmin -refreshNodes
> ec -verifyClusterSetup -policy RS-LEGACY-6-3-1024k
> dfs -mv /lSFVKIFi/GbkVxPvqoc /lSFVKIFi/PWXVE
> dfsadmin -metasave /lSFVKIFi/PWXVE
> dfsadmin -clrQuota /lSFVKIFi/
> dfsadmin -setBalancerBandwidth 29653 /lSFVKIFi/
> dfs -expunge -immediate
> ec -setPolicy -path /lSFVKIFi/ -policy XOR-2-1-1024k
> dfs -put -f -d /tmp/upfuzz/hdfs/LNSEzfJm/z /lSFVKIFi/PWXVE
> dfs -expunge -immediate
> dfsadmin -setQuota 6117966147645490803 /lSFVKIFi/
> ec -unsetPolicy -path /lSFVKIFi/PWXVE
> dfs -put -f -p -d /tmp/upfuzz/hdfs/OFcqsksu/vFrDCyPAiJY /lSFVKIFi/
> dfsadmin -refreshUserToGroupsMappings
> dfsadmin -metasave /lSFVKIFi/PWXVE
> dfsadmin -refreshUserToGroupsMappings
> dfs -touchz /lSFVKIFi/vFrDCyPAiJY/-setSpaceQuota.txt
> dfsadmin -setSpaceQuota 10 -storageType ARCHIVE /lSFVKIFi/
> dfs -put -d /tmp/upfuzz/hdfs/JWahtWfR/Ai /lSFVKIFi/PWXVE/z
> dfs -put -d /tmp/upfuzz/hdfs/vwyIeBXc/CJV /lSFVKIFi/PWXVE
> dfsadmin -setBalancerBandwidth 29653 /lSFVKIFi/
> dfsadmin -refreshServiceAcl
> dfsadmin -clrQuota /lSFVKIFi/
> dfs -touchz /lSFVKIFi/WXVE.yaml
> dfsadmin -refreshCallQueue
> dfsadmin -setBalancerBandwidth 10 /lSFVKIFi/PWXVE
> // READ COMMAND
> // First read
> > dfs -ls -h -t -S -u /lSFVKIFi/vFrDCyPAiJY
> Found 2 items
> -rw-r--r-- 1 root 6345 0 2023-08-30 22:03
> /lSFVKIFi/vFrDCyPAiJY/-setSpaceQuota.txt
> -rw-r--r-- 1 20001 6345 24 K 2023-08-30 18:38
> /lSFVKIFi/vFrDCyPAiJY/mfHU
> // Execute the check sum
> dfs -checksum /lSFVKIFi/PWXVE/z/eJMiAwNEO
> // Second read
> > dfs -ls -h -t -S -u /lSFVKIFi/vFrDCyPAiJY
> Found 2 items
> -rw-r--r-- 1 20001 6345 24 K 2023-08-30 22:03
> /lSFVKIFi/vFrDCyPAiJY/mfHU
> -rw-r--r-- 1 root 6345 0 2023-08-30 22:03
> /lSFVKIFi/vFrDCyPAiJY/-setSpaceQuota.txt{code}
> The modification is changed. However, checksum shouldn't have any side
> effects according to its specification.
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