Agreed, this sounds like IMA was broken. -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Marc-André Lapierre Sent: Wednesday, May 31, 2006 7:33 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: Citrix Farm crash analysis Stop your server IMA service, and recreate your LHC _____________________________________________ Marc-André Lapierre - MALICIS Informatique Inc. Consultant Senior / Senior Consultant Infrastructures & Systèmes Informatiques Systems & infrastructures malapierre@xxxxxxxxxxx (514) 516-0040 _____ De : thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] De la part de Josh Pepper Envoyé : 31 mai, 2006 18:32 À : thin@xxxxxxxxxxxxx Objet : [THIN] Citrix Farm crash analysis All- Today, our Citrix farm went down. Well, at least logins through the web interface died. The actual symptom was that when people tried to log into the Web Interface, they got the error message, ?ERROR: The supplied credentials could not be validated. Either they are incorrect, or there is a problem with the authentication system. Try again, or contact your help desk or system administrator for help.? Then we noticed that our Data Collector started to act ?funny? ? that all of a sudden there were no active sessions on it. So we tried to disable logins on it (in order to diagnose) and got the attached error message (?The value entered for ?maximum memory to use for each session?s graphics? is invalid. Please enter a value between 150 kilobytes and 8192 kilobytes. Error code: 51a?). Meanwhile, people who were already logged into Citrix seemed to continue on OK, except of course for people trying to log in. We rebooted the Data Collector, and the credentialing error on the web interface went away, and people were able to log in again. Currently, our only suspicion is that someone was using the Management Console at the exact time that a network error occurred, severing their connection. Could a lost RDP connection have resulted in a horrendously bad setting on the data collector, resulting in failed logins? Anyone? Thanks Josh