Ubuntu
transmission package

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

Bug #888497 reported by John Pye
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
transmission (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

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.

Revision history for this message
John Pye (jdpipe) wrote :

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

Revision history for this message
Sampo (sampo) wrote :

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

Revision history for this message
Launchpad Janitor (janitor) wrote :

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

Changed in transmission (Ubuntu):
status: New → Confirmed
Revision history for this message
kasper Bjerby (kasperbjerby) wrote :

Will this ever get fixed?

Revision history for this message
Otto Fuchshuber Filho (o2to2f) wrote :

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.

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