Ruby Mysql can't connect to localhost (10061)

Question

Im following the ruby on rails course from Lynda, where I have problems connecting to the database using the command line in windows.

I can connect to the database using "mysql -u username -p" and entering the password afterwards. I can create databases and all without problem.

Now when executing:

rake db:schema:dump

in my application folder "simple_cms" I get the following:

rake aborted!
Can't connect to MySQL server on 'localhost' (10061)

Tasks: TOP => db:schema:dump
(See full trace by running task with --trace)

Running the trace gives:

C:\Users\ASUS\Desktop\simple_cms>rake db:schema:dump --trace
** Invoke db:schema:dump (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Execute db:load_config
** Execute db:schema:dump
rake aborted!
Can't connect to MySQL server on 'localhost' (10061)
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/client.
rb:44:in `connect'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/client.
rb:44:in `initialize'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/mysql2_adapter.rb:16:in `new'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/mysql2_adapter.rb:16:in `mysql2_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:315:in `new_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:242:in `loop'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:242:in `block in checkout'
C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:239:in `checkout'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:102:in `block in connection'
C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:101:in `connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/connec
tion_adapters/abstract/connection_specification.rb:145:in `connection'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/railti
es/databases.rake:379:in `block (4 levels) in <top (required)>'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/railti
es/databases.rake:378:in `open'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.2.10/lib/active_record/railti
es/databases.rake:378:in `block (3 levels) in <top (required)>'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:228:in `call'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:228:in `block i
n execute'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:223:in `each'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:223:in `execute
'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:166:in `block i
n invoke_with_call_chain'
C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_
with_call_chain'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:152:in `invoke'

C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:143:in `
invoke_task'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `
block (2 levels) in top_level'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `
each'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `
block in top_level'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:110:in `
run_with_threads'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:95:in `t
op_level'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:73:in `b
lock in run'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:160:in `
standard_exception_handling'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:70:in `r
un'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rake-10.0.3/bin/rake:33:in `<top (required)>
'
C:/Ruby192/bin/rake:19:in `load'
C:/Ruby192/bin/rake:19:in `<main>'
Tasks: TOP => db:schema:dump

C:\Users\ASUS\Desktop\simple_cms>

Now in my database.yml file I have already put user and password in and remembered to put the integerpassword in "" and a space between the colon and the password itself like:

# MySQL.  Versions 4.1 and 5.0 are recommended.
# 
# Install the MYSQL driver
#   gem install mysql2
#
# Ensure the MySQL gem is defined in your Gemfile
#   gem 'mysql2'
#
# And be sure to use new-style password hashing:
#   http://dev.mysql.com/doc/refman/5.0/en/old-client.html
development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: simple_cms_development
  pool: 5
  username: simplelogin
  password: "1234"
  host: localhost

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: simple_cms_test
  pool: 5
  username: root
  password:
  host: localhost

production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: simple_cms_production
  pool: 5
  username: root
  password:
  host: localhost

I have even tried switching the "localhost" with the ip as described here (same problem): Rails development - Can't connect to MySQL server on 'localhost' (10061)

But when I do that I don't get any messages in return from the commandline.

So why can't I connect to the database? Would appreciate any help! Thanks! Trying to learn ruby and the whole installationsprocess has already eaten up lots of hours...

Answer 1

The problem with using the mysql command and using a connector is that mysql can have different default parameters based on how it is configured, making it difficult to know what is going on.

You should look for a file called my.cnf (or my.ini if you're on Windows). It can specify a different port or host. You're lucky that you are able to connect to the database through mysql because you can see where you are actually connected.

Take a look at your port:

mysql> show variables like 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.00 sec)

mysql> show variables like 'socket';
+---------------+-----------------+
| Variable_name | Value           |
+---------------+-----------------+
| socket        | /tmp/mysql.sock |
+---------------+-----------------+
1 row in set (0.00 sec)

mysql> show variables like 'hostname';
+---------------+-------------+
| Variable_name | Value       |
+---------------+-------------+
| hostname      | myhostname  |
+---------------+-------------+
1 row in set (0.00 sec)

See if these values match up with the database.yml file.

Once you have these values, you can try to telnet on that port. If there is nothing listening on that port you'll get something like:

$ telnet localhost 11111
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
Trying fe80::1...
telnet: connect to address fe80::1: Connection refused
telnet: Unable to connect to remote host

but if there is a connection, you'll see some junk with "mysql" written somewhere:

$ telnet localhost 3306
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
J
5.5.28JzKEXl7?5e|bUcq/5\Q^mysql_native_passwordConnection closed by foreign host.

I work on Unix, so your output may look different.

Answer 2

I was in the same Lynda course.

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: simple_cms_development
  pool: 5
  username: root
  password:
  host: 127.0.0.1
  port: 3306
  socket: C:/xampp/mysql/mysql.sock

I'm on Windows 8 and using mysql with the XAMPP package.

I have tried everything, and what really fixed it was the change from localhost to 127.0.0.1

Answer 3

I worked on this issue for a few days, tried nearly every solution available on internet. Finally I am able to solve that error by adding port:3306 and restarting WEBrick server using 'rails server' command.

Thank you.

Answer 4

I have seen this hideous thing in Ruby and in the command line!

Can't connect to MySQL server on 'localhost' (10061)

If the solutions above doesn't work, I suspect it could be a problem related to the lack MySQL services running. Rails cannot access MySQL, unless you solve the bug of MySQL.

DIAGNOSIS

Before trying the solution below, go to the command line and try to access MySQL once again from the bin folder: mysql -u username -p

If you get something like this:

ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (10061)

Then try this:

1. Run the cmd as administrator (if you can't you must consult with your IT representative)
2. Go to the bin folder in MySQL and install MySQL services using the following command:
mysqld --install

You can receive any of these 2 messages:

The service already exists!

OR

The service was sucessfully installed

Don't close the cmd!

3. Search for "Services"
4. Once you've opened "Services" select MySQL and click "start".
5. From the command line try to access mysql again as unidentified user, as root or as simple_cms. mysql -u simplelogin -p
If you are successful, then try to run rails again