MySQL Sock Error - Existing threads no help

[dempsey]

I know there are already loads of threads about MySQL.Sock errors, but I have read through all of the ones I could find and none of them helped me.

I have just restored my server from the old HD and everything seems to be working now apart from MySQL, giving me the error: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

I can't seem to find a myqsl.sock file anywhere, I looked in /tmp, /var/tmp, /var/lib/mysql.

I have tried /scripts/fixmysql and that doesn't help, nor does /scripts/mysqlup --force

Is there anyway to recreate a mysql.sock file? Is it just a text file with some data in?

Anyone have any ideas on something to try?

Thanks for any replies

 

[chirpy]

A few things to try:

1. Make sure /var and /tmp aren't full!

2. Ensure the file ownerships are correct:

chown -R mysql:mysql /var/lib/mysql

3. Check that /tmp is chmod 1777:

chmod 1777 /tmp

4. Pre-create the symlink in /tmp:

ln -sv /var/lib/mysql/mysq.sock /tmp/mysql.sock

5. Lastly, check /etc/my.cnf and edit it so that it only has these lines in it:

[mysqld]
set-variable = max_connections=500
safe-show-database

That pretty much covers all the cases I've found for the problem. If it still doesn't work:

/scripts/mysqlup --force

 

[dempsey]

Thanks, I've tried all of those and still doesn't work.

/tmp wasn't full, but I emptied out a few files. What/where can I clear out in /var ?

Is there a way I can force mysql.sock to be created? Or manually make one? Or copy one from another machine? It doesn't seem to be making it.

Any other ideas?

 

[AndyReed]

Thanks, I've tried all of those and still doesn't work.

/tmp wasn't full, but I emptied out a few files. What/where can I clear out in /var ?

Is there a way I can force mysql.sock to be created? Or manually make one? Or copy one from another machine? It doesn't seem to be making it.

That's very odd. Are you sure MySQL is installed, or installed properly, on the new server?

 

[dempsey]

That's very odd. Are you sure MySQL is installed, or installed properly, on the new server?

its the same server, just a new HD, I think it's installed properly, I've tried forcing an update, but how can I try reinstalling it completly?

 

[AndyReed]

its the same server, just a new HD, I think it's installed properly, I've tried forcing an update, but how can I try reinstalling it completly?

Still, make sure MySQL is installed properly.

Login to WHM and change the root password for MySQL. Then run these commands:
chmod 1777 /tmp
ps aux |grep mysql
killall -9 mysql
ln -s /var/lib/mysql/mysql.sock /var/tmp/mysql.sock
chown -R mysql:mysql /var/lib/mysql
/scripts/restartv mysql

Check on errors:
tail -f /var/log/mysqld.log

If that doesn't work, try this command:
/scripts/mysqlup --force

If that doesn't work, I suggest you hire a sys admin to fix this problem for you.

 

[dempsey]

change the root password for MySQL

Mysql password change failed!!
A forced reset will now be attempted.

Waiting for mysql to restart.....Done
Changing Password..../usr/sbin/mysqld: ready for connections.
Version: '4.1.14-standard'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MySQL Community Edition - Standard (GPL)
Done
Reloading Mysqld...
Done
Waiting for mysql to terminate.....

Restarting MySQL ....Starting MySQL...................................[FAILED] Done

The MySQL root password has been changed.

ps aux |grep mysql

root     22376  0.0  0.1  3688  668 pts/0    S    10:12   0:00 grep mysql

killall -9 mysql

mysql: no process killed

/scripts/restartv mysql

-bash: /scripts/restartv: No such file or directory

So I used

/etc/init.d/mysql restart

and it returned

MySQL PID file could not be found!                         [[COLOR=Red]FAILED[/COLOR]]
Starting MySQL...................................          [[COLOR=Red]FAILED[/COLOR]]

Check on errors:
tail -f /var/log/mysqld.log

tail: /var/log/mysqld.log: No such file or directory
tail: no files remaining

If that doesn't work, try this command:
/scripts/mysqlup --force

/usr/bin/mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!
mysql has failed, please contact the sysadmin (result was "Warning, no valid mysql.sock file found.mysql has failed").
Install Complete

If that doesn't work, I suggest you hire a sys admin to fix this problem for you.

Looks like I might have to

Thanks for trying to help I can't think of anything else to try now

 

[xerophyte]

try this

1) edit the /etc/my.cnf file and put this under the section

[mysqld]
socket = /var/lib/mysql/mysql.sock

2) Then stop it then restart and see if that helps

 

[madaboutlinux]

I know there are already loads of threads about MySQL.Sock errors, but I have read through all of the ones I could find and none of them helped me.

I have just restored my server from the old HD and everything seems to be working now apart from MySQL, giving me the error: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

I can't seem to find a myqsl.sock file anywhere, I looked in /tmp, /var/tmp, /var/lib/mysql.

I have tried /scripts/fixmysql and that doesn't help, nor does /scripts/mysqlup --force

Is there anyway to recreate a mysql.sock file? Is it just a text file with some data in?

Anyone have any ideas on something to try?

Thanks for any replies

See if this helps you :- http://forums.cpanel.net/showthread.php?t=48890

 

[jester.ro]

hmm, i just had this happening on a newly installed server, and i thought i made a mistake while setting up and screwed it.

nothing worked. i tried setting pid and sock directly in my.cnf, i changed the name of the pid in /etc/init.d/mysql ...nada

even switched versions, from 4.0 to 4.1, and back.


finally i gave up and did a yum remove MySQL*
deleted the /var/lib/mysql dir and my.cnf and ran /scripts/mysqlup (after setting the desired mysql version in whm tweak settings). It worked.

This was a newly installed centos 4.2 server. Make sure u don;t loose valuable databases when deleting var/lib/mysql.

 

[dempsey]

Well I think MySQL is up and running now, not sure what they did, but got someone to have a look for me, thank you to everyone for your replies :D

 

[Tiago]

Hi,

Same problem here.

New clean install on CentOs 4.2. I solved the problem removing mysql and installing again with /scripts/mysqlup.

 

[duranduran]

Fix

Try This:

myisamchk -s /var/lib/mysql/db.MYI

If you see any erros, execute:

myisamchk -r /var/lib/mysql/db.MYI

and

myisamchk -o /var/lib/mysql/db.MYI

Now service mysql restart