If a regular file 'x' exists and it is removed and a directory of the same name 'x' is tried to create, it fails, saying File exists. The back-end however does not have the file. I encountered this in a simple AFR config.

pavan@dapawz:~/mounts/mnt1/locks$ touch test
pavan@dapawz:~/mounts/mnt1/locks$ ls
a  b  file  locktests  locktests.c  locktests.c~  Makefile  test
pavan@dapawz:~/mounts/mnt1/locks$ rm test
pavan@dapawz:~/mounts/mnt1/locks$ ls
a  b  file  locktests  locktests.c  locktests.c~  Makefile
pavan@dapawz:~/mounts/mnt1/locks$ mkdir test
mkdir: cannot create directory `test': File exists

I've moved the log files and spec files to /share/tickets/<bug id> since the file sizes were huge.

Infact - the bug does exist. Every mkdir fails and it says that the file exists. If a long name is given for the directory name, it succeeds, but the directory created has a truncated name. I noticed this on a simple AFR config. However, the backend directories are consistent, and have the same exact truncated directory if the mkdir succeeds.

[root@management mnt1]# mkdir ggggggg
mkdir: cannot create directory `ggggggg': File exists
[root@management mnt1]# mkdir ggggggggggg
[root@management mnt1]# ls
abc  ggg

[root@management mnt1]# mkdir a
mkdir: cannot create directory `a': File exists
[root@management mnt1]# mkdir b
mkdir: cannot create directory `b': File exists
[root@management mnt1]# ls
abc  ggg

Volfiles and log files in /share/tickets/226/

..<snip>
009-08-25 14:48:14] E [posix.c:814:posix_mkdir] posix: mkdir of / failed: File exists
[2009-08-25 14:48:14] T [server-protocol.c:772:server_mkdir_cbk] server: 172: MKDIR /  ==> -1 (File exists)
[2009-08-25 14:48:14] T [server-protocol.c:4565:server_xattrop_resume] brick: 55: XATTROP '/ (1)'

Verified that mkdir always fails even in a simple FUSE->posix setup.

$ mkdir blah
mkdir: cannot create directory 'blah': File exists

$ mkdir 1234567890
$ ls

90

The first eight characters appear to get truncated, and thus for short names an mkdir is attempted on "/", which fails with EEXIST.

PATCH: http://patches.gluster.com/patch/1161 in master (fuse: protocol fix: fix bogus parsing of MKDIR message)