Unstopable container: Child 170622 exited with status 7

Hello,

I have an very strange issue with openvz - I can't stop container.

uname -a
Linux ovz63.fastvps.ru 2.6.32-042stab072.10 #1 SMP Wed Jan 16 18:54:05 MSK 2013 x86_64 x86_64 x86_64 GNU/Linux

vzlist |grep 6318
      6318 8 running 88.198.252.41 yyy.ru

I tryed many times this command:
vzctl stop 6318
Stopping container ...
Child 171771 exited with status 7
Killing container ...
Child 171773 exited with status 7
Unable to stop container

but container is still running:
vzlist|grep 6318
      6318 8 running 88.198.252.41 pupik.ru

I tryed kill CT process-by-process, but it did not helped also:


 for i in `ps aux|awk '{print $2}'` ; do vzpid $i | grep -v CTID | awk '{print $1 " " $2}' ;done|grep 6318 | awk '{print $1}'
16584
16585
16586
330166
550504
670235
747985
952680

U can see all process running on VE below:
ps aux|grep 16584
root 16584 0.0 0.0 0 0 ? Ss Feb09 0:01 [init]
root 186944 0.0 0.0 103260 924 pts/0 S+ 08:48 0:00 grep 16584

[root@ovz63 ~]# ps aux|grep 16585
root 16585 0.0 0.0 0 0 ? S Feb09 0:00 [kthreadd/6318]
root 186952 0.0 0.0 103260 920 pts/0 S+ 08:48 0:00 grep 16585

[root@ovz63 ~]# ps aux|grep 16586
root 16586 0.0 0.0 0 0 ? S Feb09 0:00 [khelper/6318]
root 186955 0.0 0.0 103260 924 pts/0 S+ 08:48 0:00 grep 16586

[root@ovz63 ~]# ps aux|grep 550504
root 187002 0.0 0.0 103256 928 pts/0 S+ 08:49 0:00 grep 550504
500 550504 0.0 0.0 0 0 ? Z Feb12 0:48 [php] <defunct>

[root@ovz63 ~]# ps aux|grep 330166
root 187046 0.0 0.0 103260 928 pts/0 S+ 08:49 0:00 grep 330166
33 330166 0.0 0.0 152980 5588 ? D Feb10 0:02 /usr/sbin/apache2 -k start

[root@ovz63 ~]# ps aux|grep 550504
root 187063 0.0 0.0 103256 924 pts/0 S+ 08:49 0:00 grep 550504
500 550504 0.0 0.0 0 0 ? Z Feb12 0:48 [php] <defunct>

[root@ovz63 ~]# ps aux|grep 747985
root 187095 0.0 0.0 103256 924 pts/0 S+ 08:49 0:00 grep 747985
503 747985 0.0 0.0 0 0 ? Z Feb10 0:01 [php] <defunct>

[root@ovz63 ~]# ps aux|grep 952680
root 187105 0.0 0.0 103256 924 pts/0 S+ 08:49 0:00 grep 952680
503 952680 0.0 0.0 0 0 ? Z Feb10 0:01 [php] <defunct>


U tryed many-many-many times kill -9 this processes, process by process, but it was unkillable!

kill -9 330166
[root@ovz63 ~]# ps aux|grep 330166
root 170314 0.0 0.0 4388 640 pts/0 T 08:43 0:00 strace -f -p 330166
root 194986 0.0 0.0 103260 928 pts/0 S+ 08:51 0:00 grep 330166
33 330166 0.0 0.0 152980 5588 ? D Feb10 0:02 /usr/sbin/apache2 -k start


As I can see, problem with apache in D state:


echo w > /proc/sysrq-trigger
[314733.332512] Show Blocked State
[314733.332574] task taskaddr stack pid father veid
[314733.332906] apache2 D ffff880c29ead320 0 330166 16584 6318 0x00000084
[314733.334019] ffff880bb4141e08 0000000000000082 ffff880c29ead320 ffff880c29ead320
[314733.334147] ffff880bb4141ec8 ffff880c29ead320 ffffffff8100bc4e ffff880bb4141e08
[314733.334273] 0000000000000212 0000000000000000 ffff880c29ead8e8 000000000001e9c0
[314733.334399] Call Trace:
[314733.334460] [<ffffffff8100bc4e>] ? apic_timer_interrupt+0xe/0x20
[314733.334526] [<ffffffff8104e1ad>] ? mutex_spin_on_owner+0x8d/0xc0
[314733.334592] [<ffffffff814f175e>] __mutex_lock_slowpath+0x13e/0x180
[314733.334657] [<ffffffff814f15fb>] mutex_lock+0x2b/0x50
[314733.334720] [<ffffffff811a94d9>] do_unlinkat+0xa9/0x1b0
[314733.334784] [<ffffffff810e63b7>] ? audit_syscall_entry+0x1d7/0x200
[314733.334848] [<ffffffff811a95f6>] sys_unlink+0x16/0x20
[314733.334912] [<ffffffff8100b102>] system_call_fastpath+0x16/0x1b


ps -eo ppid,pid,user,stat,pcpu,comm,wchan:32 |grep 330166
  16584 330166 33 D 0.0 apache2 unlinkat
 330166 550504 500 Z 0.0 php <defunct> exit
 330166 670235 503 Z 0.0 php <defunct> exit
 330166 747985 503 Z 0.0 php <defunct> exit
 330166 952680 503 Z 0.0 php <defunct> exit

I was forced HWN reboot, but it's impossible way to fix issue!

May be this bug is related with openvz?