Hanging process inside container

[jmartin]

While running a previously successful compile in an OpenVZ container, one of the processes got stuck.

I can only tell which process it is by running "top":
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
31425 1002 20 0 1330m 18m 9508 D 99 0.1 1186:07 jarsigner

"ps ax" list all processes up to but not including the "bad one". vzps and vztop don't show any processes at all.

ls /proc/31425 hangs, so does cat /proc/31425/cmdline.

vzctl .. stop times out after a while.

strace -p 31425 just sits and waits after printing "Process 31425 attached - interrupt to quit".

Appearantly, that process is stuck in a system call somewhere.

Is there any way to get rid of it without rebooting the host machine?

 

[dietmar]

I assume 'kill -9 31425' does not help?

 

[jmartin]

I assume 'kill -9 31425' does not help?

No. Neither with this process nor with any of the other processes that got stuck on this process (ps, ls).

I've never had much luck trying to kill processes in "uninterruptible sleep" such as this one. What's special about this one is that it uses 100% CPU (though sleeping?)...

 

[dietmar]

try to ask on the openvz list - experts are there.