Quick summary:
- good thing is I that it is solved.
- bad thing is that it seems to be kernel-related. read on.
sean finney wrote:
is this an strace from the daemon while it was having the problem you
reported, or after you attempted the various other things you did? it
doesn't look like it's segfaulting anymore from this trace, but instead
having some other problem.
it has the problems in converting innodb tables having messed up myself
with 4.0 -> 4.1 and back to 4.0 ;)
...but after that (I forgot to temporarly disable innodb with
"skip-innodb" just to go further... and then it would have crashed the
same way. my bad, it was quite late last night when i did that :-))
something i'd recommend: after making a full backup of whatever
db stuff you still have, try *purging* mysql-*, rm -rf /var/lib/mysql,
and reinstall it and see if a default empty install has this problem.
note that you can't really downgrade from 4.1 back to 4.0 without
some problems so let's keep it on 4.0 while we try to figure this out.
sure I had done that too, only the trace you saw wasn't of such a
"clear" situation.... :-(
[Please note that I've contacted also the hosting provider, as they
provide the kernel (it is a UML machine) - in fact, it might be hardware
(virtualization) related.... also bind9 was failing with a segfault
after the upgrade, and I have had to resort back (at least in the
meanwhile) to bind8 which instead starts fine.... everything else works
as expected, these mails are passing through this very same box, for
instance :-)]
these could be related. i don't have access to a UML environment, so i
can't say that i tested the latest version of mysql in there. i
wouldn't rule that out, anyway.
hosting provider swapped the kernel "under the hood" with a 2.4.x (but
still with UML obviously....) and it now works.
Also bind9 which was segfaulting now runs fine....
by the way, are you doing anything out
of the ordinary with nsswitch? ldap? nis?
I don't think so. Maybe I am not aware of it :-)
Thanks a lot for the help.
I might let you talk with the hosting provider, as they run a lot of
those 2.6 UML machines and in fact they thought right away it was
related.... I CC them in this mail, eventually you can follow up with
them if you think it is necessary to have this properly tested in case
it happens to other people too....
Best Regards,
Daniele
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