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https://issues.apache.org/jira/browse/HADOOP-4395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE updated HADOOP-4395:
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Attachment: 4395_20081010.patch
4395_20081010.patch: fix the problem. see whether I could add a unit test.
> Reloading FSImage and FSEditLog may erase user and group information
> --------------------------------------------------------------------
>
> Key: HADOOP-4395
> URL: https://issues.apache.org/jira/browse/HADOOP-4395
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: Tsz Wo (Nicholas), SZE
> Priority: Blocker
> Fix For: 0.18.2
>
> Attachments: 4395_20081010.patch
>
>
> The bug can be reproduced as following:
> {noformat}
> bash-3.2$ ./bin/hadoop fs -lsr
> -rw-r--r-- 3 tsz supergroup 1366 2008-10-10 17:52 /user/tsz/a.txt
> -rw-r--r-- 3 tsz supergroup 1366 2008-10-10 17:52 /user/tsz/b.txt
> bash-3.2$ ./bin/hadoop fs -chown sze a.txt
> bash-3.2$ ./bin/hadoop fs -lsr
> -rw-r--r-- 3 sze supergroup 1366 2008-10-10 17:52 /user/tsz/a.txt
> -rw-r--r-- 3 tsz supergroup 1366 2008-10-10 17:52 /user/tsz/b.txt
> {noformat}
> Then, restart cluster ...
> {noformat}
> bash-3.2$ ./bin/hadoop fs -lsr
> -rw-r--r-- 3 sze 1366 2008-10-10 17:52 /user/tsz/a.txt
> -rw-r--r-- 3 tsz supergroup 1366 2008-10-10 17:52 /user/tsz/b.txt
> {noformat}
> The group information for a.txt is missing.
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