Transmission dies with 100% CPU, killing results in zombie process

[John Pye]

I have transmission-gtk 2.33 running on Ubuntu 11.10 with Unity 2D. I recently added a couple of largish torrents, but they're consistently causing Transmission to go to 100% CPU. The menus (top of Unity 2D screen) are still working, but don't seem to do anything when clicked. When I use the [X] on the window, it doesn't do anything and doesn't off a 'force kill' or anything like that. When I kill the process with 'kill -9' it turns into a <defunct> zombie process. My CPU is still going crazy. With my Lenovo X1 that means that the CPU temperature is at 86 °C... this bug could kill people's laptops!

I have rebooted several times, but the issue returns when I restart Transmission. There is nothing in /var/crash.

[John Pye (jdpipe)]

Also: this is with 32-bit Ubuntu. The torrents in question are >4GB. Not sure if that matters.

[Sampo (sampo)]

The culprit is likely to be encrypted home directory rather than transmission.

It looks like kernel and/or ecryptfs and/or ext4 bug.

The fact that file is larger than 4GB appears to be important.

See related bug #913787

My distro LinuxMint 12 (derived from Ubuntu 11.10).

uname -a
Linux saz 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:50:42 UTC 2011 i686 i686 i386 GNU/Linux

Cheers,
--Sampo

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[kasper Bjerby (kasperbjerby)]

Will this ever get fixed?

[Otto Fuchshuber Filho (o2to2f)]

Exactly the same happens here with Transmission, qBittorrent and Deluge (Ubuntu 11.10 32 bits with all updates, hardware Lenovo Thinkpad X200).
A old dicussion of this (Karmic) can be seen at https://bugs.launchpad.net/ubuntu/+source/ecryptfs-utils/+bug/431975.
My workaround: create a folder /home/BT (non encrypted), adjust permissions and download torrents to it.