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https://issues.apache.org/jira/browse/HDFS-3608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419467#comment-13419467
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Hudson commented on HDFS-3608:
------------------------------
Integrated in Hadoop-Hdfs-trunk-Commit #2572 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/2572/])
HDFS-3608. fuse_dfs: detect changes in UID ticket cache. Contributed by
Colin Patrick McCabe. (Revision 1363904)
Result = SUCCESS
atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1363904
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/CMakeLists.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/CMakeLists.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_connect.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_connect.h
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_context_handle.h
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_dfs.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_file_handle.h
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_chmod.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_chown.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_flush.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_getattr.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_mkdir.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_open.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_read.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_readdir.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_release.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_rename.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_rmdir.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_statfs.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_truncate.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_unlink.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_utimens.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_impls_write.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/fuse-dfs/fuse_init.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/hdfs.c
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/hdfs.h
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/jni_helper.c
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/util
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/native/util/tree.h
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
> fuse_dfs: detect changes in UID ticket cache
> --------------------------------------------
>
> Key: HDFS-3608
> URL: https://issues.apache.org/jira/browse/HDFS-3608
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.1.0-alpha
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Fix For: 2.2.0-alpha
>
> Attachments: HDFS-3608.004.patch, HDFS-3608.006.patch,
> HDFS-3608.007.patch, HDFS-3608.008.patch, HDFS-3608.009.patch,
> HDFS-3608.010.patch, HDFS-3608.011.patch, HDFS-3608.patch
>
>
> Currently in fuse_dfs, if one kinits as some principal "foo" and then does
> some operation on fuse_dfs, then kdestroy and kinit as some principal "bar",
> subsequent operations done via fuse_dfs will still use cached credentials for
> "foo". The reason for this is that fuse_dfs caches Filesystem instances using
> the UID of the user running the command as the key into the cache. This is a
> very uncommon scenario, since it's pretty uncommon for a single user to want
> to use credentials for several different principals on the same box.
> However, we can use inotify to detect changes in the Kerberos ticket cache
> file and force the next operation to create a new FileSystem instance in that
> case. This will also require a reference counting mechanism in fuse_dfs so
> that we can free the FileSystem classes when they refer to previous Kerberos
> ticket caches.
> Another mechanism is to run a stat periodically on the ticket cache file.
> This is a good fallback mechanism if inotify does not work on the file (for
> example, because it's on an NFS mount.)
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