Public bug reported:
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 defi
And now we've got a second trace from the same machine with a bit more
info:
And one more:
[14032.676085] general protection fault: [#1] SMP
[14032.678409] Modules linked in: isofs xt_CHECKSUM iptable_mangle
ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4
nf_defrag_ipv4
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/ Enhance
Thanks for looking into this Stefan! We were completely fine with 15.05
and 3.19. If it won't break anything terribly, I can try to put 3.19,
4.0, and 4.1 on these machines, but each one crashes every 24-48 hours,
so it might take me several days. Which kernel would you recommend
starting with, say
Hey Stefan,
Just wanted to update you that I've installed the Mainline 4.0.9 kernel
(4.0.9-040009-generic #201507212131) on all affected machines, finishing
about an hour ago, from https://wiki.ubuntu.com/Kernel/MainlineBuilds.
I've still had two crashes in the hour since the downgrade.
I don't k
And I should also point out that ifquery is crashing on boot most of the
time on these systems:
xxx.log:[3.909680] ifquery[378]: segfault at 1 ip 00403187 sp
7fff7078d8c0 error 4 in ifup[40+d000]
xxx.log:[3.008003] ifquery[380]: segfault at 1 ip 00403187 sp
7f
I have now downgraded all of these systems to 3.19.8-031908-generic
(Mainline). We'll know in a couple of days if this fixed it (or as soon
as a few hours if it didn't fix it, possibly). I'll update when I know
anything else; good so far! 4.0.9 definitely didn't fix it completely,
but MAY have made
3.19 crashed as well, just now. This is surprising. I don't have a
trace, as the kernel downgrades messed up netconsole somehow, but I'll
try to get it working again.
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https:/
Sorry, I don't think there's any possible way to do it. The machine
won't boot. I could try to reproduce the issue again on a different VM,
but I still wouldn't be able to collect logs.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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