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From "Gabor Bota (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-13322) fuse dfs - uid persists when switching between ticket caches
Date Fri, 06 Apr 2018 12:00:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-13322?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gabor Bota reassigned HDFS-13322:
---------------------------------

    Assignee: Gabor Bota

> fuse dfs - uid persists when switching between ticket caches
> ------------------------------------------------------------
>
>                 Key: HDFS-13322
>                 URL: https://issues.apache.org/jira/browse/HDFS-13322
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: fuse-dfs
>    Affects Versions: 2.6.0
>         Environment: Linux xxxxxx.xx.xx.xxx 3.10.0-514.el7.x86_64 #1 SMP Wed Oct 19
11:24:13 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux
>  
>            Reporter: Alex Volskiy
>            Assignee: Gabor Bota
>            Priority: Minor
>
> The symptoms of this issue are the same as described in HDFS-3608 except the workaround
that was applied (detect changes in UID ticket cache) doesn't resolve the issue when multiple
ticket caches are in use by the same user.
> Our use case requires that a job scheduler running as a specific uid obtain separate
kerberos sessions per job and that each of these sessions use a separate cache. When switching
sessions this way, no change is made to the original ticket cache so the cached filesystem
instance doesn't get regenerated.
>  
> {{$ export KRB5CCNAME=/tmp/krb5cc_session1}}
> {{$ kinit user_a@domain}}
> {{$ touch /fuse_mount/tmp/testfile1}}
> {{$ ls -l /fuse_mount/tmp/testfile1}}
> {{ *-rwxrwxr-x 1 user_a user_a 0 Mar 21 13:37 /fuse_mount/tmp/testfile1*}}
> {{$ export KRB5CCNAME=/tmp/krb5cc_session2}}
> {{$ kinit user_b@domain}}
> {{$ touch /fuse_mount/tmp/testfile2}}
> {{$ ls -l /fuse_mount/tmp/testfile2}}
> {{ *-rwxrwxr-x 1 user_a user_a 0 Mar 21 13:37 /fuse_mount/tmp/testfile2*}}
> {{   }}{color:#d04437}*{{** expected owner to be user_b **}}*{color}



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