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I'm running a virtualMachine on ESXi -- Ubuntu as a webserver -- (apache2 with nginx as his proxy, php, mysql) and services keeps hanging/freezing causing the whole server to be unresponsive. It's not possible to connect to it by ssh, basicly it requires a reboot from vSphere to come back online.

Description: Ubuntu 10.04.1 LTS Release: 10.04 Codename: lucid

at vSphere I see this message when my server is unreachable:: INFO: task: apache2 (or mysql or nginx) blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_sys_timeout_secs" disables this message

i think that likely it happens in high traffic on my sites what could i do?!


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any idea pro guys??! –  m mov Oct 22 '12 at 7:27
I think it is probably Apache its self hanging. Do you have any syslog entries related to the problem, or from around the hang? –  Bailey S Oct 23 '12 at 23:34
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