Sunday, February 12, 2012

why did the server crash

There was an outage for a few hours yesterday. Reason was that the server had stopped responding. All services seemed to have crashed. Audio streams from around 11 am, Apache from around 3.50 pm. No ssh also. But a remote reboot worked and solved the issue.

Checking out logs, Apache's access log and error log both stop at around 3.50 pm till the restart around 50 minutes later. Not much info except some lines in Apache logs which say possible SYN flooding, which may or may not be a real DoS attack. If there is a tuning issue with SYN flooding, this might be a possible solution,

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