I'm also seeing this on my Nexus 4. Except here, gstreamer hangs and makes the process unkillable.
Here is a bit of trace from our code: thumbnailer-service: [06:53:02.902] timeout, state = 2 thumbnailer-service: [06:53:02.902] killing process 12806 thumbnailer-service: [06:53:02.902] calling waitpid for process 12806 thumbnailer-service: [06:53:31.900] waitpid for process 12806 returned This happens when a timer fires. If gstreamer doesn't complete within 10 seconds, we kill the process. (Each video thumbnail is extracted in a separate process, so we can recover from gstreamer crashes and hangs.) However, take a look at the time stamps. We sent a SIGKILL at 53.02 and immediately called waitpid(). But waitpid() does not return until 29 seconds later. This strongly suggests a kernel problem. (At least as far as I know, the only way for SIGKILL to not kill a process is if the process is asleep in the kernel at uninterruptible priority.) ** Changed in: gstreamer0.10 (Ubuntu) Importance: High => Critical -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gstreamer0.10 in Ubuntu. https://bugs.launchpad.net/bugs/1466273 Title: gstreamer fails intermittently Status in Thumbnail generator for all kinds of files: New Status in gstreamer0.10 package in Ubuntu: New Bug description: gstreamer occasionally fails to extract a thumbnail from a video file. It's clearly a race condition because, almost all of the time, it succeeds. To reproduce: Check out the thumbnailer/devel branch at r217 and build it. Then: cd build/src/vs-thumb ./vs-thumb fd://0 ./x.jpg <../../../tests/media/testvideo.ogg Point a browser at the generated x.jpg file and check that the image was extracted correctly. Now run while ./vs-thumb fd://0 ./x.jpg <../../../tests/media/testvideo.ogg ; do :; done Within maybe a hundred iterations or so, I get: Error creating thumbnail: ThumbnailExtractor: change_state(): reading async messages: GStreamer error: negotiation problem. To manage notifications about this bug go to: https://bugs.launchpad.net/thumbnailer/+bug/1466273/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
