Re: [Bacula-users] [Bacula-devel] Storage Daemon crash backtrace

On Fri, Jul 2, 2010 at 9:17 AM, Kern Sibbald <kern AT sibbald DOT com> wrote:

Hello Robert,

Eric and I "finished" Bacula Enterprise version 4.0.0 today, a bit faster than
I expected, so I am not running all the final tests, which gave me some time

to look at the problem.

I downloaded the zlib source code, and I don't immediately see anything in the
file that would cause problems -- of course it is quite complicated code.

I did look through the Bacula TLS code, and I noticed that the author did not
properly set error conditions in Bacula when it finds an error on the comm
line. This could cause Bacula to continue running, and might cause
subsequent calls to openssl subroutines, when there is no valid data, and
thus the seg fault. I still must test the changes I made.

It is rather a long shot, but if you see that everytime that the SD crashes it
is when there is a disrupted comm line problem, then it could well be the
problem -- of course, if one has a good solid network, there should never be
any "broken pipe" errors, which is possibly why we cannot see the problem.

Having said this, I cannot rule out a problem on openssl at this point.

It makes sense to me. I'm transferring the data over the university network, so the network isn't terrible, however there are plenty of routers and speed changes between the FD and SD. I don't know if some packets are coming out of order and may be causing issues (TCP should reorder them before the apps sees the data anyway). I was running a bond interface on the SD in mode 6 over two different physical switch paths. I have since stopped using bonding to see if things got better (not really any change).

If you have branch I can pull, I would be happy to help test this.

Thanks,

Robert LeBlanc
Life Sciences & Undergraduate Education Computer Support
Brigham Young University

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