Re: (ITS#4659) Core dump after MOD

[quanah@stanford.edu]

--On Friday, September 01, 2006 9:44 AM +0200 Pierangelo Masarati 
<ando@sys-net.it> wrote:

> quanah@stanford.edu wrote:
>> --On Friday, September 01, 2006 1:40 AM +0200 Pierangelo Masarati
>> <ando@sys-net.it> wrote:
>>
>>
>>> I note that HEAD & re24 radically differ in this area; that specific
>>> assertion does no longer exist, and the signaling to the writewaiters is
>>> much more lightweight.  Could it be related to sucking in an incomplete
>>> or inconsistent set of diffs?
>>>
>>
>> Always possible, but I don't think so...
>>
>> That specific assertion looks like it exists to me.
> correct, the code differs in many points, but that logic didn't change.
> I'm trying to figure out if and how, in the close procedure for
> connections, there's any guarantee that a pending write is definitely
> tried and completed before actually closing, and who and if, in this
> case, resets the value of c_writewaiter.

After looking at the timing of everything, it is possible that I did kill 
-9 on a syncrepl consumer right in the middle of the MOD where the master 
died.  That may have triggered this core, if the timing was all right down 
to the nanosecond...

--Quanah

--
Quanah Gibson-Mount
Principal Software Developer
ITS/Shared Application Services
Stanford University
GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html