Public bug reported: bzr diff on a repository that is mounted via NFSv4 triggers a bug. The result is that bzr hangs and is unkillable by any means, including kill -9. Another result is a NFS4 packet storm involving repeated failures of a WRITE request.
This seems to be a very specific corner case, as NFS4 works perfectly for everything else. Reading other bug reports and the bzr code, it seems to involve some kind of interaction between file locking and the ftruncate() system call. Complete information can be found in bug https://bugs.launchpad.net/bugs/651806 . To reproduce, unpack the attached tar file to make a directory called "bar" containing a .bzr repository. Unpack this somewhere that is mounted over nfs4. cd bar bzr diff enjoy! ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: linux-image-2.6.35-23-generic 2.6.35-23.36 Regression: Yes Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.35-23.36-generic 2.6.35.7 Uname: Linux 2.6.35-23-generic x86_64 NonfreeKernelModules: fglrx AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: gpk 5100 F.... pulseaudio /dev/snd/pcmC0D0p: gpk 5100 F...m pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16' Mixer name : 'Realtek ALC887' Components : 'HDA:10ec0887,1458a002,00100202' Controls : 38 Simple ctrls : 21 Date: Sat Oct 30 18:05:38 2010 HibernationDevice: RESUME=UUID=6f657719-3b2e-4471-b419-bd2d396aeac2 InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1) IwConfig: lo no wireless extensions. eth0 no wireless extensions. vboxnet0 no wireless extensions. MachineType: Gigabyte Technology Co., Ltd. GA-MA78LMT-S2 ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-23-generic root=UUID=f52187b6-c1df-4ee2-9996-bfac2bc98c2d ro quiet splash ProcEnviron: PATH=(custom, user) LANG=en_GB.utf8 SHELL=/bin/bash RelatedPackageVersions: linux-firmware 1.38 RfKill: SourcePackage: linux dmi.bios.date: 03/18/2010 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F6 dmi.board.name: GA-MA78LMT-S2 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF6:bd03/18/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA78LMT-S2:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA78LMT-S2:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-MA78LMT-S2 dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug kernel-fs kill maverick needs-upstream-testing nfs4 nfsv4 packet regression-release storm -- nfs4 hangs, unkillable, using lots of CPU time https://bugs.launchpad.net/bugs/668813 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
