The ICPSR web site and several of its special topic web sites were unavailable from 1:01pm EST until 1:20pm EST on Tuesday, February 9, 2010. This was an unscheduled outage.
The proximate reason for outage was that the tomcat web application server faulted during a routine deployment, and stopped answering queries. This caused the ICPSR web site and other "new platform" web sites written in Java/JSP to become unresponsive.
ICPSR IT staff detected the problem immediately after the deployment, and began troubleshooting. After a brief series of diagnostics, the problem was isolated to tomcat. After the team restarted tomcat, the problem cleared.
Our apologies for any inconvenience this may have caused.