mysql over TCP and far out PIDs

Darryl Moore darryl-90a536wCiRb3fQ9qLvQP4Q at public.gmane.org
Wed Feb 19 17:08:26 UTC 2014


Hi list,

I lurk around this maillist a lot, but don't say much. I'm having an
interesting issue right now though that maybe someone here might have
some insight into, which I'd really appreaciate.

I'm running servers with Ubuntu 12.04 with upgraded 3.5 kernels and
mysql 5.5.35

On three machines which are supposedly identical, only one works as it
is suppose to allowing me to login to mysql via TCP. On the other two I
get this message.

Lost connection to MySQL server at 'reading initial communication
packet', system error: 0

I know mysql is listening (or someone is) because on a non listening
port I get:

ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)

Mysql is configured identical on all machines. What is really odd is
when I run netstat I get the follow output:

#netstat -n -l -e | grep tcp
tcp 0 0 0.0.0.0:10050 0.0.0.0:* LISTEN 128 15430
tcp 0 0 0.0.0.0:5222 0.0.0.0:* LISTEN 120 14278
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 116 452074
tcp 0 0 127.0.0.1:587 0.0.0.0:* LISTEN 0 15278

The last column is the PID of the listening process. In this case
process id 452074 is listening on Mysql's port. However no process id is
ever suppose to be greater than 65535 and when I lookup mysql's process
ID i get this:

#ps ax | grep mysql
 7560 ?        Ssl    0:01 /usr/sbin/mysqld
 8109 pts/1    S+     0:00 grep --color=auto mysql

So mysql's PID is really 7560 and nobody should be 452074. Does anybody
have clue what is going on here? Any insight would be greatly appreciated.

cheers,
darryl

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