[SOLVED] mysql cannot connect socket but fine through TCP/IP

hctopcu · 07-29-2010, 05:37 AM

I'm using mysql server through tcp/ip with no problem. But I don't know since when I'm not able to connect through socket. There are lots of topics but my bad I couldn't find one works for me.

OS: Ubuntu 9.04
mysql 5.0.75-0ubuntu10.5

my.cnf

Quote:

[mysqld]
user = mysql
socket = /var/run/mysqld/mysqld.sock

skip-name-resolve
safe-show-database
#old_passwords
back_log = 50
skip-innodb
max_connections = 800
key_buffer_size = 1024M
myisam_sort_buffer_size = 128M
join_buffer_size = 3M
read_buffer_size = 3M
sort_buffer_size = 8M
table_cache = 8000
thread_cache_size = 768
wait_timeout = 60
connect_timeout = 10
tmp_table_size = 144M
max_heap_table_size = 144M
max_allowed_packet = 64M
net_buffer_length = 16384
max_connect_errors = 10
thread_concurrency = 16
concurrent_insert = 2
table_lock_wait_timeout = 30
read_rnd_buffer_size = 786432
bulk_insert_buffer_size = 8M
query_cache_limit = 6M
query_cache_size = 288M
query_cache_type = 1
query_prealloc_size = 262144
query_alloc_block_size = 65536
transaction_alloc_block_size = 8192
transaction_prealloc_size = 4096
default-storage-engine = MyISAM
max_write_lock_count = 16

[mysqld_safe]
nice = -10
open_files_limit = 8192

[mysqldump]
quick
max_allowed_packet = 16M

[myisamchk]
key_buffer = 1024M
sort_buffer = 64M
read_buffer = 16M
write_buffer = 16M
!includedir /etc/mysql/conf.d/

/var/run/mysqld/mysqld.sock socket exists and has chmod 777
Error:

Code:

ERROR 2002 (HY000): Can't connect to local MySQL server through socket 'localhost' (2)

Guttorm · 07-29-2010, 08:23 AM

Hi

Not really sure, but it looks like that last error message comes from a client trying to connect to a socket named "localhost". The clients can also read my.cnf, but look for a section called "client". Add this to my.cnf:

[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock

This is from the default my.cnf. Did you remove the client section in it?

crabboy · 07-29-2010, 08:36 AM

Explain what you mean by you can connect with TCP/IP and not sockets?

Use 'netstat -anp | grep LISTEN' and check to see if mysqld is listening. How are you trying to connect?

hctopcu · 08-06-2010, 05:03 AM

Hi;
Just after an update, I fired a reboot. The problem was dissapeared. I could'nt trace it. Thanks for the advices though.