LDAP

LDAP (Lightweight Directory Access Protocol) service

Widespread service disruption due to UPS failure

November 21, 2009 by IRIS Staff

Last evening about 21:26 there was a power failure in the main EECS server room in Soda Hall. The UPS held up some systems until about 22:00 at which time staff shut the room down completely. Many EECS services were disrupted as a result. The problem was found to be in the UPS which fried the high voltage output terminal block. The terminal block was bypassed and the UPS has been removed from service until further notice. Most EECS computing services have been restored as of 03:15 this morning with the exception of the IRIS web server, which was restored around 10:15am Sunday.

Thanks to the staff who came in early Sunday morning to deal with this issue.

Resolved as of 2009-11-22 03:15:00

Interruption to IMAP and other services

October 29, 2009 by Rob McNicholas

The Department’s directory server stopped responding around noon today. This affected multiple other services including www.eecs and imap.eecs.

The service was restarted at 12:19pm, and other services recovered soon after.
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LDAP Service Restored

June 11, 2009 by IRIS Staff

We are still having issues with the new server setup, so the deployment of the new servers is delayed for the time-being.
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LDAP problem

May 28, 2009 by IRIS Staff

There is an LDAP problem that is affecting some services including sending mail through gateway.eecs . Staff are working to correct the problem.
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LDAP Server Issues

February 8, 2008 by IRIS Staff

The departmental mail server (imap.eecs) and LDAP servers should now be working mostly properly. However, there are a few unresolved technical problems. You may encounter SSL certificate validation errors on our LDAP server (ldap.eecs and ldap.cs). As such, it may not be completely reliable for the remainder of today, and possibly across this weekend as well. We are actively working on solving the underlying problem, and will post an update as soon as we can.

No incoming or outgoing email was lost.

Technical background: Earlier today, the SSL certificates on our LDAP servers expired. This caused the LDAP daemon on ldap.eecs to hang, and refuse new connections. This cacscaded into a failure of part of IMAP system, and the IMAP daemon on imap.eecs similarly hung. We’ve managed to restart the daemons on both servers. Unfortunately, we’re running into a problem on the LDAP server, and are unable to install new, un-expired SSL certificates. As a result, we’re not completely confident that our LDAP servers won’t crash again, and take the IMAP server with it. Again, we’re continuously working on trying to fix this.
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Service Outage/Slowness

August 15, 2007 by IRIS Staff

Some service outages/slowness was experienced early in the morning. The problem has been resolved. The cause of the outage.is being investigated.
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