Quote:
Originally Posted by Ser Olmy
A low memory condition should eventually trigger the kernel oomkiller, but that will only affect processes running on the server, and never something as basic as network connectivity.
Did you try pinging the gateway? Was there an entry for the gateway in the ARP cache when this happened?
Anything in the logs immediately prior to and after network connectivity was lost?
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I didn't try pinging the gateway. I'll try that the next time the problem happens, thanks for the idea.
The last thing in /var/log/messages was some apache entries like this:
Mar 8 23:49:57 hostname drupal:
http://www.hostname.com|1394347797|m...||0||Retrieved ne
w CAPTCHA#012#012Request: POST
http://rest.mollom.com/v1/captcha#012 type = 'image'#012 ssl = 0#012#012Request headers:#012 Accept = 'application/x
ml, application/json;q=0.8, */*;q=0.5'#012 Content-Type = 'application/x-www-form-urlencoded'#012 Authorization = 'OAuth oauth_consumer_key="079943c
bb7a9d6141e0d49fb8700de78", oauth_version="1.0", oauth_nonce="58fda8a94d1f9ed0d9f26c864f0aab4b", oauth_timestamp="1394347796", oauth_signature_method=
"HMAC-SHA1", oauth_signature="Ica0u1rFipmFj%2FctiNrWHpoXjrw%3D"'#012#012Response: 200 #012 code = '200'#012 captcha =#012 id = '14030919d19a4dbbc
6'#012 url = 'http://173.192.235.120:80/v1/captcha/14030919d19a4dbbc6.png'#012#012Retrieved new CAPTCHA
After the network connection is lost, there is not much in the logs, but I can see that things are still running. Cron is still processing (runs an ISPConfig update script every 2 minutes), named is complaining that the network is unreachable when trying to resolve hostnames, and the postfix mailq is being run (all attempts from previously queued mail gets set back to deferred due to domain names not being found).