Discussion:
netbsd random reboot
el kalin
2014-10-08 15:30:21 UTC
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hi all...

i have a netbsd 6 on ec2 (aws - amazon web services) like:
NetBSD 6.0 NetBSD 6.0 (XEN3_DOMU) amd64

every now and then - usually early morning between 3 and 4 am - the machine
reboots itself and there is no other indication why except the below long
string of garbage in the email log


my guess is that for whatever reason part of the actual incoming message is
somehow intended to be written to the log file. i did try to look at the
base64 encoded string after all the ^@s but it's not text.

the machine uses default postfix setup and the mail is routed trough
procmail for certain addresses.

this used to happened more often before i made the ec2 instance bigger. now
it's m1.large and apparently it's still happening from time to time. before
i made it bigger the log wasn't containing any base64 string. i remember
seeng the ^@s but not the string...

any ideas of what that might be?!

thanks..


here is a copy of the mail log entry at the time the machine reboots it's
self


^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@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
Christos Zoulas
2014-10-09 00:37:08 UTC
Permalink
-=-=-=-=-=-
hi all...
NetBSD 6.0 NetBSD 6.0 (XEN3_DOMU) amd64
every now and then - usually early morning between 3 and 4 am - the machine
reboots itself and there is no other indication why except the below long
string of garbage in the email log

my guess is that for whatever reason part of the actual incoming message is
somehow intended to be written to the log file. i did try to look at the
the machine uses default postfix setup and the mail is routed trough
procmail for certain addresses.
this used to happened more often before i made the ec2 instance bigger. now
it's m1.large and apparently it's still happening from time to time. before
i made it bigger the log wasn't containing any base64 string. i remember
any ideas of what that might be?!
Do you have DDB in your kernel? Is there anything in the messages file?
Can you run vmstat 1 in a window, and see what happens?

christos
Manuel Bouyer
2014-10-09 07:31:54 UTC
Permalink
Post by el kalin
hi all...
NetBSD 6.0 NetBSD 6.0 (XEN3_DOMU) amd64
I would recommend upgrading to 6.1.5. Lots of fixes have been in since
6.0, including a few ones that could explain your reboots.
--
Manuel Bouyer <***@antioche.eu.org>
NetBSD: 26 ans d'experience feront toujours la difference
--
Chavdar Ivanov
2014-10-09 14:26:04 UTC
Permalink
Just FYI, my instance looks like:

➜ ~ uname -a
NetBSD ip-172-31-12-50.eu-west-1.compute.internal 6.1.4 NetBSD 6.1.4
(XEN3_DOMU) amd64
➜ ~ uptime
2:27PM up 105 days, 5:32, 7 users, load averages: 0.00, 0.02, 0.00

It is the small (free) one, though.

Chavdar Ivanov
Post by Manuel Bouyer
Post by el kalin
hi all...
NetBSD 6.0 NetBSD 6.0 (XEN3_DOMU) amd64
I would recommend upgrading to 6.1.5. Lots of fixes have been in since
6.0, including a few ones that could explain your reboots.
--
NetBSD: 26 ans d'experience feront toujours la difference
--
--
----
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