[21:49:33] <tonyb>	 I have a, very old, mediawiki install that uses openid for user authentication.  in the last 24-48 hours things broke.
[21:50:36] <tonyb>	 I can still authenticate with the openid provider, and get the correct response, but that session/login seems to be immediately invalid/logged out. 
[21:51:02] <tonyb>	 I have verified that the openid provider is funcational, I'm not sure where to look?
[21:51:42] <Reedy>	 Did anything change? OS upgrades?
[21:52:09] <tonyb>	 Reedy: nope, I was just about to say that
[21:52:56] <tonyb>	 no OS/package chnages.  no on has logged in via ssh (apart from me) for the last 5 days
[21:53:43] <tonyb>	 no chnages via puppet or ansible etc
[21:54:10] <Reedy>	 what session storage are you using?
[21:54:15] <tonyb>	 Nothing in the apache error_log
[21:55:30] <tonyb>	 memcached-pecl
[21:55:55] <Reedy>	 checked your memcached log? ;)
[21:57:05] <tonyb>	 Reedy: I haven't and it *looks* like memcached isn't running.
[21:57:29] <Reedy>	 That might expain it.. if it crashed at some point
[21:57:31] <tonyb>	 I'll follow that strand and let you know 
[21:59:50] <tonyb>	 Yup that was it.
[22:00:07] <tonyb>	 Now the workout why it crashed
[22:04:15] <Reedy>	 Could be one of those not worth putting a lot of time into it unless it starts happening often
[22:26:24] <tonyb>	 Reedy: Thanks for your help.  I really should have looked there myself.
[22:27:14] <tonyb>	 I couldn't see any reason it wasn't running.  The load on the server had been high, but memory was fine so I don't think the oom-killer kicked in or anything