Re: [cx-oracle-users] segmentation violations

[James C. M. <Jam...@or...>]

Hi Fred,
Great to see that you've found the root cause. When I
looked at your stack trace, these lines stood out:


#0 0x0000003c9ee0f6ab in raise () from /lib64/libpthread.so.0
#1 <signal handler called>
#2 0x00007f5ab2f3ddff in __intel_ssse3_rep_memcpy () from 
/usr/lib/oracle/12.1/client64/lib/libclntsh.so.12.1
#3 0x00007f5ab2f36cc6 in _intel_fast_memcpy.P () from 
/usr/lib/oracle/12.1/client64/lib/libclntsh.so.12.1

because in my experience a segv in such a lowlevel routine
indicates that the cpu is being mis-detected.

Before I could suggest checking your hardware, you figured
it out.

James

On 26/10/16 07:48 am, Fred Yankowski wrote:
> It now appears that my problem was caused by migrating the server from a
> VMware 4 host to a VMware 5 host without upgrading the "hardware version"
> of the virtual machine.
>
> I totally forgot that our system admin team had done that about a week
> ago. The server otherwise worked exactly the same after that migration. It
> may have required a restart of Apache after the migration for the Oracle
> connection error to start appearing.
>
> Our lead sys admin just migrated my server temporarily back to a VMware 4
> host and I can no longer reproduce the error there.
>
> On a matching dev server running on a VMware 5 host we just upgraded the
> virtual hardware version and now I can no longer reproduce the error there.
>
> So the fix may be as simple as upgrading the virtual machine hardware
> version on the production machine, which we plan to do as soon as we can
> schedule a little down time.
>
>
> I really hope that works out to be the solution. It's been years since
> I've dealt with an application failure this nasty.
>
>
> --
> Fred Yankowski
> fc...@im... +1-630-907-5019
>
>
> P.S.  Yes, I should upgrade our Python version to the latest available.
> I'll get to that once the server is stable again.
>
> P.P.S.  Thanks for helping out.
>
>
>
>
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-- 
James C. McPherson
--
Oracle
Systems / Solaris / Core
https://www.jmcpdotcom.com/blog