The ICPSR web server was unavailable between 1:01am and 1:11am on Thursday, March 4, 2010.
The root cause of the problem is still under investigation.
When the on-call systems administrator received the page, he restarted the copy of tomcat that hosts our primary web delivery application (icpsrweb). This single restart not only brought the main web site back on-line, it also brought other web applications (Summer Program portal, study search, and others) back on-line as well.
Our apologies for the inconvenience this may have caused our web site visitors.