[Ocfs2-users] Ftp server... single file seems locked

[Jason Price]

To add further information:

1) Note A:
# cat /sys/kernel/debug/o2dlm/6D419D86AE8A4DB1940788EDDA27027B/dlm_state
Domain: 6D419D86AE8A4DB1940788EDDA27027B  Key: 0xc955c1d5
Thread Pid: 3869  Node: 1  State: JOINED
Number of Joins: 1  Joining Node: 255
Domain Map: 1 2
Live Map: 1 2
Lock Resources: 70731 (442210)
MLEs: 0 (1048380)
  Blocking: 0 (647669)
  Mastery: 0 (400711)
  Migration: 0 (0)
Lists: Dirty=Empty  Purge=Empty  PendingASTs=Empty  PendingBASTs=Empty
Purge Count: 0  Refs: 70732
Dead Node: 255
Recovery Pid: 3870  Master: 255  State: INACTIVE
Recovery Map:
Recovery Node State:

Node B:
#  cat /sys/kernel/debug/o2dlm/6D419D86AE8A4DB1940788EDDA27027B/dlm_state
Domain: 6D419D86AE8A4DB1940788EDDA27027B  Key: 0xc955c1d5
Thread Pid: 3757  Node: 2  State: JOINED
Number of Joins: 1  Joining Node: 255
Domain Map: 1 2
Live Map: 1 2
Lock Resources: 48113 (50521)
MLEs: 0 (85510)
  Blocking: 0 (35121)
  Mastery: 0 (50389)
  Migration: 0 (0)
Lists: Dirty=Empty  Purge=Empty  PendingASTs=Empty  PendingBASTs=Empty
Purge Count: 0  Refs: 48114
Dead Node: 255
Recovery Pid: 3758  Master: 255  State: INACTIVE
Recovery Map:
Recovery Node State:

There are no busy locks apparently, as shown by

# debugfs.ocfs2 -R "fs_locks -B" /dev/sda1
#

I am unable to kill any of these processes, even with kill -9.

# cat /etc/ocfs2/cluster.conf
cluster:
        node_count = 2
        name = ocfs2ftpcluster

node:
        ip_port = 7777
        ip_address = 192.168.0.1
        number = 1
        name = prtftp01
        cluster = ocfs2ftpcluster

node:
        ip_port = 7777
        ip_address = 192.168.0.2
        number = 2
        name = prtftp02
        cluster = ocfs2ftpcluster

If you'd like the output of :

# debugfs.ocfs2 -R "fs_locks" /dev/sda1 | wc -l
768681

I can give it, but it's a lot output.

--Jason

On Fri, Apr 2, 2010 at 11:38 AM, Jason Price <japrice at gmail.com> wrote:

> I'm setting up an HA ftp server (amongst other services).
>
> When two connections happen simultaneously, and (more specifically) the
> same user from two IP's attempt to access the same file (one for reading,
> and one for writing), the processes both hang.  And all subsequent attempts
> to either read or write the file fail.
>
> The two processes that seem to have caused the lock:
> user  24139  1657 Thu Apr  1 18:25:01 2010 proftpd: cbs -
> ::ffff:xxx.yyy.0.253: RETR prim_wo_img_dom.obs
> user  24142  1657 Thu Apr  1 18:25:01 2010 proftpd: cbs -
> ::ffff:xxx.yyy.103.208: STOR prim_wo_img_dom.obs
>
> (there are 49 other process trying to do the same things, but these are the
> first ones.)
>
> I'm more than happy to provide any information needed on this issue:
>
> OSL
> CentOS release 5.4 (Final)
>
> uname -a:
> Linux prtftp01<omitted> 2.6.18-164.11.1.el5 #1 SMP Wed Jan 20 07:32:21 EST
> 2010 x86_64 x86_64 x86_64 GNU/Linux
>
> ocfs2 version 1.4.4
>
> At the moment, only one host is actively serving FTP at any time.  I can
> fail the services back and forth as needed.
>
> --Jason
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