I have been very badly hurt by this, as our programmers were very actively working on PHP application and all of a sudden yesterday my Aamzon EC2 instance stopped responding to all TCP/UDP communication. I tried everything including ec2-reboot but nothing worked out, there were few major changes in the code which were not backed up and I fear losing them.
The distribution was CentOS 5 and I was running apache and ha-proxy on the instance, ha-proxy was running for a possible new instance launch to accommodate the load. Thanks that I had MySQL db on a different instance. The instance was launched using RightScale (because my client wanted it). The RightScale guys had some code changes in their Dashboard but I doubt that will effect the running instance.
I am not going to terminate the instance until there is the a last ray of hope. I am posting this question to some major forums including slashdot and others in the hope that I might get some help. So, if any of you have ever faced this situation, how you dealt with it? How you recovered your data from EC2 instance? And how did you get back you instance to respond to TCP communication?
UPDATE: That was a hardware fault and after sometime the instance came back to normal without losing anything. :) Thanks everyone who helped me during that time.