[Gluster-devel] Failure to release unusable file open fd_count on glusterfs v3.7.11

[Xavier Hernandez]

Hi, 

thanks for testing it. I've identified an fd leak in the
disperse xlator. I've filed a bug [1] for this. 

Xavi 

[1]
https://bugzilla.redhat.com/show_bug.cgi?id=1344396 

On 08.06.2016
05:00, 彭繼霆 wrote: 

> Hi, I have a volume created with 3 bricks.After
delete file which was created by "echo", the file has been move to
unlink folder.Excepted result, opened fd should be zero, and unlink
folder contains no file.But actually, opened fd is not zero, unlink
folder contains a file.
> Here are some examples:# gluster volume info
ec2
> 
> Volume Name: ec2
> Type: Disperse
> Volume ID:
47988520-0e18-4413-9e55-3ec3f3352600
> Status: Started
> Number of
Bricks: 1 x (2 + 1) = 3
> Transport-type: tcp
> Bricks:
> Brick1:
giting1:/export/ec2/fs
> Brick2: giting2:/export/ec2/fs
> Brick3:
giting3:/export/ec2/fs
> Options Reconfigured:
>
performance.readdir-ahead: on
> 
> # gluster v status ec2
> 
> Status of
volume: ec2
> Gluster process TCP Port RDMA Port Online Pid
>
------------------------------------------------------------------------------
>
Brick giting1:/export/ec2/fs 49154 0 Y 10856
> Brick
giting2:/export/ec2/fs 49154 0 Y 7967
> Brick giting3:/export/ec2/fs
49153 0 Y 7216
> NFS Server on localhost N/A N/A N N/A
> Self-heal
Daemon on localhost N/A N/A Y 10884
> NFS Server on giting3 2049 0 Y
7236
> Self-heal Daemon on giting3 N/A N/A Y 7244
> NFS Server on
giting2 2049 0 Y 7987
> Self-heal Daemon on giting2 N/A N/A Y 7995
> 
>
Task Status of Volume ec2
>
------------------------------------------------------------------------------
>
There are no active volume tasks
> 
> # mount -t glusterfs giting1:ec2
/ec2
> # df -h
> Filesystem Size Used Avail Use% Mounted on
>
/dev/mapper/centos-root 18G 12G 5.8G 67% /
> devtmpfs 1.9G 0 1.9G 0%
/dev
> tmpfs 1.9G 0 1.9G 0% /dev/shm
> tmpfs 1.9G 41M 1.9G 3% /run
>
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
> /dev/sdb 40G 33M 40G 1%
/export/bk1
> /dev/sda1 497M 168M 330M 34% /boot
> tmpfs 380M 0 380M 0%
/run/user/0
> giting1:dht 80G 66M 80G 1% /dht
> giting1:/ec1 35G 24G 12G
67% /volume/ec1
> giting1:ec2 35G 24G 12G 67% /ec2 
> 
> # gluster v top
ec2 open
> 
> Brick: giting1:/export/ec2/fs 
> Current open fds: 0, Max
open fds: 0, Max openfd time: N/A 
> Brick: giting2:/export/ec2/fs 
>
Current open fds: 0, Max open fds: 0, Max openfd time: N/A 
> Brick:
giting3:/export/ec2/fs 
> Current open fds: 0, Max open fds: 0, Max
openfd time: N/A 
> 
> # for ((i=0;i /ec2/test.txt; done 
> 
> # gluster
v top ec2 open 
> Brick: giting1:/export/ec2/fs 
> Current open fds: 9,
Max open fds: 10, Max openfd time: 2016-06-08 10:09:23.665717 
> Count
filename 
> ======================= 
> 10 /test.txt 
> Brick:
giting3:/export/ec2/fs 
> Current open fds: 9, Max open fds: 10, Max
openfd time: 2016-06-08 10:09:23.299795 
> Count filename 
>
======================= 
> 10 /test.txt 
> Brick: giting2:/export/ec2/fs

> Current open fds: 9, Max open fds: 10, Max openfd time: 2016-06-08
10:09:23.236294 
> Count filename 
> ======================= 
> 10
/test.txt 
> 
> # ll /export/ec2/fs/.glusterfs/unlink/
> 
> total 0
> 
>
# rm /ec2/test.txt
> 
> # ls -l /export/ec2/fs/.glusterfs/unlink/ 
>
total 8 
> -rw-r--r-- 1 root root 512 Jun 8 18:09
a053b266-15c5-4ac7-ac44-841e177c7ebe 
> 
> # gluster v top ec2 open 
>
Brick: giting1:/export/ec2/fs 
> Current open fds: 8, Max open fds: 10,
Max openfd time: 2016-06-08 10:09:23.665717 
> Count filename 
>
======================= 
> 10 /test.txt 
> Brick: giting2:/export/ec2/fs

> Current open fds: 8, Max open fds: 10, Max openfd time: 2016-06-08
10:09:23.236294 
> Count filename 
> ======================= 
> 10
/test.txt 
> Brick: giting3:/export/ec2/fs 
> Current open fds: 8, Max
open fds: 10, Max openfd time: 2016-06-08 10:09:23.299795 
> Count
filename 
> ======================= 
> 10 /test.txt 
> 
> Reference:
Commit: storage/posix: Implement .unlink directory
>
https://github.com/gluster/glusterfs/commit/195548f55b09bf71db92929b7b734407b863093c
[1] 
> 
> Regards,
> 
> Gi-ting Peng
 

Links:
------
[1]
https://github.com/gluster/glusterfs/commit/195548f55b09bf71db92929b7b734407b863093c
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