One more thing: This server has ECC memory, and it also has a BMC controller that externally logs all hardware errors independently of the memory condition. >From what I understand, ECC memory module has an extra memory chip for data >hashes. When data is written into ECC memory, the hash is created and stored >in the extra chip, and when it's retrieved, the hash is checked. When a >mismatch occurs, even if kernel does not log such error, the BMC controller >logs it as # ipmitool sel list 1c10 | 02/19/2009 | 16:29:39 | Memory #0x08 | Uncorrectable ECC | .. I retrieved the system even log (SEL) list from the BMC controller, and are no errors whatsoever.
This looks like a Python error or something very basic. It started happening after I slightly changed the code for this particular server. -----Original Message----- From: Alec Matusis [mailto:matu...@yahoo.com] Sent: Tuesday, March 24, 2009 6:26 PM To: 'Twisted general discussion' Subject: RE: [Twisted-Python] strange server crash This server crashed again today, again during maximum load for the day. This time, no errors in the twisted log, and not even a segfault message in /var/log/messages : the pid simply ceased to exist. Once again, this machine runs 8 twisted servers, but this one is slightly different from the others, and the error happened after the code for this server has been slightly modified. I do not think this is the bad RAM anymore, because there's one particular server that keeps crashing on this machine. > -----Original Message----- > From: twisted-python-boun...@twistedmatrix.com [mailto:twisted-python- > boun...@twistedmatrix.com] On Behalf Of gl...@divmod.com > Sent: Monday, March 23, 2009 1:37 AM > To: 'Twisted general discussion' > Subject: RE: [Twisted-Python] strange server crash > > > On 07:25 am, matu...@yahoo.com wrote: > >Very strange. I am not using any custom C extensions... > >In the last two days, it has been under larger load, and it has not > >crashed. > >I will update to Python 2.6 soon. > > Have you tested for bad RAM on that server? The error mode is > sufficiently weird and rare to make me suspect cosmic rays. > > _______________________________________________ > Twisted-Python mailing list > Twisted-Python@twistedmatrix.com > http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
