Ubuntu 15.10 - btrfs - Kernel Panic on btrfs balance

[S. W.]

[ 360.220144] INFO: task btrfs:2938 blocked for more than 120 seconds.
[ 360.220152] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 360.220153] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 360.220155] btrfs D ffff88087fc16640 0 2938 2937 0x00000000
[ 360.220161] ffff880833b87c78 0000000000000086 ffffffff81c13500 ffff880835525940
[ 360.220163] 0000000000000246 ffff880833b88000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 360.220165] ffff880855758980 ffff8807f2c97300 ffff880833b87c98 ffffffff817ec197
[ 360.220167] Call Trace:
[ 360.220179] [<ffffffff817ec197>] schedule+0x37/0x80
[ 360.220221] [<ffffffffc03fc197>] btrfs_cancel_balance+0x127/0x180 [btrfs]
[ 360.220225] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 360.220238] [<ffffffffc040bd25>] btrfs_ioctl+0xd55/0x2760 [btrfs]
[ 360.220243] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 360.220247] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 360.220249] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 360.220251] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 360.220254] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 360.220256] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 360.220259] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 360.220264] INFO: task btrfs:3002 blocked for more than 120 seconds.
[ 360.220266] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 360.220266] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 360.220267] btrfs D ffff88087fd56640 0 3002 3001 0x00000000
[ 360.220270] ffff8807e340bc78 0000000000000086 ffff88085bf1cc80 ffff880857fa9980
[ 360.220272] 0000000000000246 ffff8807e340c000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 360.220274] ffff880855758980 ffff88085a181700 ffff8807e340bc98 ffffffff817ec197
[ 360.220276] Call Trace:
[ 360.220278] [<ffffffff817ec197>] schedule+0x37/0x80
[ 360.220289] [<ffffffffc03fbfe2>] btrfs_pause_balance+0x92/0x120 [btrfs]
[ 360.220291] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 360.220303] [<ffffffffc040ca0e>] btrfs_ioctl+0x1a3e/0x2760 [btrfs]
[ 360.220306] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 360.220308] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 360.220310] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 360.220311] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 360.220313] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 360.220315] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 360.220317] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 480.220139] INFO: task btrfs:2938 blocked for more than 120 seconds.
[ 480.220148] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 480.220149] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 480.220152] btrfs D ffff88087fc16640 0 2938 2937 0x00000000
[ 480.220159] ffff880833b87c78 0000000000000086 ffffffff81c13500 ffff880835525940
[ 480.220162] 0000000000000246 ffff880833b88000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 480.220166] ffff880855758980 ffff8807f2c97300 ffff880833b87c98 ffffffff817ec197
[ 480.220169] Call Trace:
[ 480.220180] [<ffffffff817ec197>] schedule+0x37/0x80
[ 480.220217] [<ffffffffc03fc197>] btrfs_cancel_balance+0x127/0x180 [btrfs]
[ 480.220222] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 480.220234] [<ffffffffc040bd25>] btrfs_ioctl+0xd55/0x2760 [btrfs]
[ 480.220238] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 480.220241] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 480.220243] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 480.220245] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 480.220248] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 480.220250] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 480.220253] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 480.220257] INFO: task btrfs:3002 blocked for more than 120 seconds.
[ 480.220258] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 480.220259] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 480.220260] btrfs D ffff88087fd56640 0 3002 3001 0x00000000
[ 480.220263] ffff8807e340bc78 0000000000000086 ffff88085bf1cc80 ffff880857fa9980
[ 480.220265] 0000000000000246 ffff8807e340c000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 480.220266] ffff880855758980 ffff88085a181700 ffff8807e340bc98 ffffffff817ec197
[ 480.220268] Call Trace:
[ 480.220270] [<ffffffff817ec197>] schedule+0x37/0x80
[ 480.220282] [<ffffffffc03fbfe2>] btrfs_pause_balance+0x92/0x120 [btrfs]
[ 480.220283] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 480.220294] [<ffffffffc040ca0e>] btrfs_ioctl+0x1a3e/0x2760 [btrfs]
[ 480.220297] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 480.220299] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 480.220301] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 480.220302] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 480.220304] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 480.220306] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 480.220308] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 568.995645] audit: type=1400 audit(1450161017.458:22): apparmor="STATUS" operation="profile_load" profile="unconfined" name="libvirt-313c039d-5b69-4fa1-ac3c-c2599868e26b" pid=3495 comm="apparmor_parser"
[ 568.995912] audit: type=1400 audit(1450161017.458:23): apparmor="STATUS" operation="profile_load" profile="unconfined" name="qemu_bridge_helper" pid=3495 comm="apparmor_parser"
[ 569.072231] device vnet2 entered promiscuous mode
[ 569.096185] br0: port 4(vnet2) entered listening state
[ 569.096209] br0: port 4(vnet2) entered listening state
[ 569.400115] audit: type=1400 audit(1450161017.866:24): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="libvirt-313c039d-5b69-4fa1-ac3c-c2599868e26b" pid=3520 comm="apparmor_parser"
[ 569.412287] audit: type=1400 audit(1450161017.878:25): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="qemu_bridge_helper" pid=3520 comm="apparmor_parser"
[ 572.783905] kvm: zapping shadow pages for mmio generation wraparound
[ 584.124014] br0: port 4(vnet2) entered learning state
[ 596.400977] kvm [3522]: vcpu0 unhandled rdmsr: 0x570
[ 599.132011] br0: topology change detected, propagating
[ 599.132024] br0: port 4(vnet2) entered forwarding state
[ 600.220107] INFO: task btrfs:2938 blocked for more than 120 seconds.
[ 600.220121] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 600.220126] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 600.220129] btrfs D ffff88087fc16640 0 2938 2937 0x00000000
[ 600.220139] ffff880833b87c78 0000000000000086 ffffffff81c13500 ffff880835525940
[ 600.220141] 0000000000000246 ffff880833b88000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 600.220143] ffff880855758980 ffff8807f2c97300 ffff880833b87c98 ffffffff817ec197
[ 600.220146] Call Trace:
[ 600.220155] [<ffffffff817ec197>] schedule+0x37/0x80
[ 600.220196] [<ffffffffc03fc197>] btrfs_cancel_balance+0x127/0x180 [btrfs]
[ 600.220199] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 600.220211] [<ffffffffc040bd25>] btrfs_ioctl+0xd55/0x2760 [btrfs]
[ 600.220216] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 600.220219] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 600.220221] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 600.220223] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 600.220226] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 600.220228] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 600.220231] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 600.220234] INFO: task btrfs:3002 blocked for more than 120 seconds.
[ 600.220236] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 600.220237] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 600.220237] btrfs D ffff88087fd56640 0 3002 3001 0x00000004
[ 600.220240] ffff8807e340bc78 0000000000000086 ffff88085bf1cc80 ffff880857fa9980
[ 600.220242] 0000000000000246 ffff8807e340c000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 600.220244] ffff880855758980 ffff88085a181700 ffff8807e340bc98 ffffffff817ec197
[ 600.220246] Call Trace:
[ 600.220248] [<ffffffff817ec197>] schedule+0x37/0x80
[ 600.220259] [<ffffffffc03fbfe2>] btrfs_pause_balance+0x92/0x120 [btrfs]
[ 600.220261] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 600.220272] [<ffffffffc040ca0e>] btrfs_ioctl+0x1a3e/0x2760 [btrfs]
[ 600.220274] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 600.220276] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 600.220278] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 600.220280] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 600.220282] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 600.220283] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 600.220286] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 720.220100] INFO: task btrfs:2938 blocked for more than 120 seconds.
[ 720.220108] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 720.220110] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 720.220113] btrfs D ffff88087fc16640 0 2938 2937 0x00000000
[ 720.220119] ffff880833b87c78 0000000000000086 ffffffff81c13500 ffff880835525940
[ 720.220123] 0000000000000246 ffff880833b88000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 720.220126] ffff880855758980 ffff8807f2c97300 ffff880833b87c98 ffffffff817ec197
[ 720.220129] Call Trace:
[ 720.220140] [<ffffffff817ec197>] schedule+0x37/0x80
[ 720.220182] [<ffffffffc03fc197>] btrfs_cancel_balance+0x127/0x180 [btrfs]
[ 720.220186] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 720.220198] [<ffffffffc040bd25>] btrfs_ioctl+0xd55/0x2760 [btrfs]
[ 720.220203] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 720.220206] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 720.220208] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 720.220210] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 720.220213] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 720.220215] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 720.220218] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 720.220221] INFO: task btrfs:3002 blocked for more than 120 seconds.
[ 720.220223] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 720.220223] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 720.220224] btrfs D ffff88087fd56640 0 3002 3001 0x00000004
[ 720.220227] ffff8807e340bc78 0000000000000086 ffff88085bf1cc80 ffff880857fa9980
[ 720.220229] 0000000000000246 ffff8807e340c000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 720.220231] ffff880855758980 ffff88085a181700 ffff8807e340bc98 ffffffff817ec197
[ 720.220233] Call Trace:
[ 720.220234] [<ffffffff817ec197>] schedule+0x37/0x80
[ 720.220246] [<ffffffffc03fbfe2>] btrfs_pause_balance+0x92/0x120 [btrfs]
[ 720.220247] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 720.220259] [<ffffffffc040ca0e>] btrfs_ioctl+0x1a3e/0x2760 [btrfs]
[ 720.220261] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 720.220263] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 720.220265] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 720.220266] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 720.220268] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 720.220270] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 720.220272] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 840.220097] INFO: task btrfs:2938 blocked for more than 120 seconds.
[ 840.220104] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 840.220105] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 840.220107] btrfs D ffff88087fc16640 0 2938 2937 0x00000000
[ 840.220112] ffff880833b87c78 0000000000000086 ffffffff81c13500 ffff880835525940
[ 840.220114] 0000000000000246 ffff880833b88000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 840.220116] ffff880855758980 ffff8807f2c97300 ffff880833b87c98 ffffffff817ec197
[ 840.220118] Call Trace:
[ 840.220128] [<ffffffff817ec197>] schedule+0x37/0x80
[ 840.220159] [<ffffffffc03fc197>] btrfs_cancel_balance+0x127/0x180 [btrfs]
[ 840.220163] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 840.220175] [<ffffffffc040bd25>] btrfs_ioctl+0xd55/0x2760 [btrfs]
[ 840.220180] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 840.220183] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 840.220185] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 840.220187] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 840.220190] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 840.220192] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 840.220195] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 840.220198] INFO: task btrfs:3002 blocked for more than 120 seconds.
[ 840.220200] Tainted: G OE 4.2.0-19-generic #23-Ubuntu
[ 840.220201] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 840.220202] btrfs D ffff88087fd56640 0 3002 3001 0x00000004
[ 840.220204] ffff8807e340bc78 0000000000000086 ffff88085bf1cc80 ffff880857fa9980
[ 840.220206] 0000000000000246 ffff8807e340c000 ffff88085b9c0c70 ffff88085b9c0cb0
[ 840.220208] ffff880855758980 ffff88085a181700 ffff8807e340bc98 ffffffff817ec197
[ 840.220210] Call Trace:
[ 840.220212] [<ffffffff817ec197>] schedule+0x37/0x80
[ 840.220223] [<ffffffffc03fbfe2>] btrfs_pause_balance+0x92/0x120 [btrfs]
[ 840.220225] [<ffffffff810bd110>] ? wake_atomic_t_function+0x60/0x60
[ 840.220236] [<ffffffffc040ca0e>] btrfs_ioctl+0x1a3e/0x2760 [btrfs]
[ 840.220239] [<ffffffff81192b7b>] ? lru_cache_add_active_or_unevictable+0x2b/0xa0
[ 840.220241] [<ffffffff811b5127>] ? handle_mm_fault+0xc77/0x17e0
[ 840.220242] [<ffffffff811b8acd>] ? __vma_link_rb+0xfd/0x110
[ 840.220244] [<ffffffff811b8b99>] ? vma_link+0xb9/0xc0
[ 840.220246] [<ffffffff81210a25>] do_vfs_ioctl+0x295/0x480
[ 840.220248] [<ffffffff81210c89>] SyS_ioctl+0x79/0x90
[ 840.220250] [<ffffffff817f01f2>] entry_SYSCALL_64_fastpath+0x16/0x75
---
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 15.10
HibernationDevice: RESUME=UUID=980993fc-6c0b-4081-b7db-803bf1c95cb9
InstallationDate: Installed on 2015-09-10 (96 days ago)
InstallationMedia: Ubuntu-Server 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Dell Inc. PowerEdge 2950
Package: linux-image-generic 4.2.0.19.21
PackageArchitecture: amd64
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-19-generic root=UUID=5fc5358f-103a-409e-9d07-2489c35ddf66 ro rootflags=subvol=@
ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-19-generic N/A
 linux-backports-modules-4.2.0-19-generic N/A
 linux-firmware 1.149.3
RfKill:

Tags: wily
UdevLog: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/var/log/udev'
Uname: Linux 4.2.0-19-generic x86_64
UpgradeStatus: Upgraded to wily on 2015-11-04 (41 days ago)
UserGroups:

_MarkForUpload: True
dmi.bios.date: 10/30/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.7.0
dmi.board.name: 0H603H
dmi.board.vendor: Dell Inc.
dmi.board.version: A06
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr2.7.0:bd10/30/2010:svnDellInc.:pnPowerEdge2950:pvr:rvnDellInc.:rn0H603H:rvrA06:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge 2950
dmi.sys.vendor: Dell Inc.

[S. W. (cebit2006)]

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[Brad Figg (brad-figg)]

This change was made by a bot.

[Alberto Salvia Novella (es20490446e)]

Please:

1. Edit the bug description to include how to reproduce the bug, and what are the observable consequences of it.
2. Set this bug status to "confirmed".

Thank you.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.4 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-rc5-wily

[David Miller (david3d)]

I've run into a similar issue running balance on a 3 disk btrfs filesystem with data and metadata set to raid 1. I can't confirm that I'm seeing this same exact error as I don't have any of the log output as my entire system is running on this btrfs volume. Only was able to see the output over the IPMI KVM Console.

Upgrading to kernel 4.3.3 seems to address my issue. I'll reboot back onto the default 15.10 kernel and try to reproduce again to see if I can verify that the issue I was seeing is the same.

[David Miller (david3d)]

I was able to reproduce the issue with btrfs balance that I was running into and got some of the tracebacks by sending syslog messages to another server. However it appears that it may be a different issue.

I'll open up a new issue and attach my tracebacks there.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]