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Message #156249
[Bug 1534345] Re: Ubuntu 15.10 Crashing Frequently on EC2 Instances w/ Enhanced Networking
Do you guys need a vmcore? I'm working on getting one from AWS.
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https://bugs.launchpad.net/bugs/1534345
Title:
Ubuntu 15.10 Crashing Frequently on EC2 Instances w/ Enhanced
Networking
Status in linux package in Ubuntu:
Confirmed
Bug description:
Lots of details and history of the problem here:
https://askubuntu.com/questions/710747/after-upgrading-
to-15-10-from-15-04-ec2-webservers-have-become-very-unstable
10 of my webservers have started crashing immediately following the
15.10 upgrade. As far as what exactly defines a "crash", Instance
Status Checks fail, and I can no longer SSH to the machine. Background
daemons running on the system stop responding, and nothing is written
to the logs.
After weeks of working with the AWS team, I finally fixed a netconsole
issue via "echo 7 > /proc/sys/kernel/printk" and got netconsole
working properly, and finally have a trace:
[21410.260077] general protection fault: 0000 [#1] SMP
[21410.261976] Modules linked in: isofs xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables ppdev intel_rapl iosf_mbi xen_fbfront fb_sys_fops input_leds serio_raw i2c_piix4 parport_pc 8250_fintek parport mac_hid netconsole configfs autofs4 crct10dif_pclmul crc32_pclmul cirrus syscopyarea sysfillrect sysimgblt aesni_intel ttm aes_x86_64 drm_kms_helper lrw gf128mul glue_helper ablk_helper cryptd psmouse drm ixgbevf pata_acpi floppy
[21410.264054] CPU: 0 PID: 26957 Comm: apache2 Not tainted 4.2.0-23-generic #28-Ubuntu
[21410.264054] Hardware name: Xen HVM domU, BIOS 4.2.amazon 12/07/2015
[21410.264054] task: ffff8803f9809b80 ti: ffff8803f999c000 task.ti: ffff8803f999c000
[21410.264054] RIP: 0010:[<ffffffff810e5c36>] [<ffffffff810e5c36>] run_timer_softirq+0x116/0x2d0
[21410.264054] RSP: 0000:ffff8803ff203e98 EFLAGS: 00010086
[21410.264054] RAX: dead000000200200 RBX: ffff8803ff20e9c0 RCX: ffff8803ff203ec8
[21410.264054] RDX: ffff8803ff203ec8 RSI: 0000000000011fc0 RDI: ffff8803ff20e9c0
[21410.264054] RBP: ffff8803ff203f08 R08: 000000000000a77a R09: 0000000000000000
[21410.264054] R10: 0000000000000020 R11: 0000000000000004 R12: 000000000000007c
[21410.264054] R13: ffffffff8172aaf0 R14: 0000000000000000 R15: ffff8803af955be0
[21410.264054] FS: 00007fb0ce6e8780(0000) GS:ffff8803ff200000(0000) knlGS:0000000000000000
[21410.264054] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[21410.264054] CR2: 00007fb0ce51e130 CR3: 00000003fb233000 CR4: 00000000001406f0
[21410.264054] Stack:
[21410.264054] ffff8803ff203eb8 ffff8803ff20f5f8 ffff8803ff20f3f8 ffff8803ff20f1f8
[21410.264054] ffff8803ff20e9f8 ffff8803af955b58 dead000000200200 00000000f60fabc0
[21410.264054] 0000000000011fc0 0000000000000001 ffffffff81c0b0c8 0000000000000001
[21410.264054] Call Trace:
[21410.264054] <IRQ>
[21410.264054] [<ffffffff8107f846>] __do_softirq+0xf6/0x250
[21410.264054] [<ffffffff8107fb13>] irq_exit+0xa3/0xb0
[21410.264054] [<ffffffff814a4499>] xen_evtchn_do_upcall+0x39/0x50
[21410.264054] [<ffffffff817f1f6b>] xen_hvm_callback_vector+0x6b/0x70
[21410.264054] <EOI>
[21410.264054] Code: 81 e6 00 00 20 00 48 85 d2 48 89 45 b8 0f 85 30 01 00 00 4c 89 7b 08 0f 1f 44 00 00 49 8b 07 49 8b 57 08 48 85 c0 48 89 02 74 04 <48> 89 50 08 41 f6 47 2a 10 48 b8 00 02 20 00 00 00 ad de 49 c7
[21410.264054] RIP [<ffffffff810e5c36>] run_timer_softirq+0x116/0x2d0
[21410.264054] RSP <ffff8803ff203e98>
I don't have a vmcore at the moment, but I'm trying to get one from
AWS and should have one in the next couple of days. This is happening
frequently and repeatedly since I first upgraded to 15.10 on early
December.
ubuntu@xxx-web-xx:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily
ubuntu@xxx-web-xx:~$ uname -a
Linux xxx-web-xx 4.2.0-23-generic #28-Ubuntu SMP Sun Dec 27 17:47:31 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
ubuntu@xxx-web-xx:~$
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-23-generic 4.2.0-23.28
ProcVersionSignature: User Name 4.2.0-23.28-generic 4.2.6
Uname: Linux 4.2.0-23-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Jan 14 15:42 seq
crw-rw---- 1 root audio 116, 33 Jan 14 15:42 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Thu Jan 14 21:31:14 2016
Ec2AMI: ami-d5e7adbf
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1d
Ec2InstanceType: m4.xlarge
Ec2Kernel: unavailable
Ec2Ramdisk: unavailable
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
MachineType: Xen HVM domU
PciMultimedia:
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB:
0 cirrusdrmfb
1 xen
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-23-generic root=UUID=9bd55602-81dd-4868-8cfc-b7d63f8f8d7e ro console=tty1 console=ttyS0 crashkernel=256M@0M
RelatedPackageVersions:
linux-restricted-modules-4.2.0-23-generic N/A
linux-backports-modules-4.2.0-23-generic N/A
linux-firmware 1.149.3
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-12-15 (29 days ago)
dmi.bios.date: 12/07/2015
dmi.bios.vendor: Xen
dmi.bios.version: 4.2.amazon
dmi.chassis.type: 1
dmi.chassis.vendor: Xen
dmi.modalias: dmi:bvnXen:bvr4.2.amazon:bd12/07/2015:svnXen:pnHVMdomU:pvr4.2.amazon:cvnXen:ct1:cvr:
dmi.product.name: HVM domU
dmi.product.version: 4.2.amazon
dmi.sys.vendor: Xen
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