![]() > SET GLOBAL max_allowed_packet=524288000 If the MySQL configuration file is not accessible for you, then you can set this value using the following command in the MySQL shell. But in case of BLOB values that are larger than max_allowed_packet, you need to set a higher value for the max_allowed_packet in your /etc/my.cnf configuration file under or section as shown. If it is a connection timeout problem, particularly when MySQL is trying to use an initial connection to the server, increase the value of the connect_timeout parameter. In case of a network connection problem, ensure that you have a good network connection especially if you are accessing a remote database server. You may encounter this error due to one of the following reasons: poor network connectivity, connection timeout or a problem with BLOB values that are larger than max_allowed_packet. > grant all privileges on *.test_db to flush privileges įurthermore, access denied errors can also result from problems with connecting to MySQL, refer to the previously explained errors. > SHOW GRANTS FOR can grant privileges to a particular user on specific database to the remote ip address using the following commands in the MySQL shell. You can see what privileges a given account has by running the SHOW GRANTS command as shown. In this regard, if you encounter an access denied error, check if the user account is allowed to connect to the server via the client program you are using, and possibly the host from which the connection is coming from. MySQL allows the creation of accounts that enable client users to connect to the server and access data managed by the server. It indicates that username specified in the connection does not have privileges to access the database. In addition, an account may also have authentication credentials such as a password.Īlthough there are many different causes of “ Access denied” errors, one of the common causes is relating to the MySQL accounts that the server permits client programs to use when connecting. In MySQL, a user account is defined in terms of a username and the client host or hosts from which the user can connect to the server. These errors indicate that the server might be running, however, you are trying to connect using a TCP/IP port, named pipe, or Unix socket file different from the one on which the server is listening. Other common errors you are likely to encounter when you try to connect to the MySQL server are: ERROR 2003: Can't connect to MySQL server on 'host_name' (111)ĮRROR 2002: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111) Also ensure that the server has network connections enabled and that the network port you are using to connect is the one configured on the server. ![]() Here, start by checking that there is a MySQL server running on the system as shown above. $ sudo netstat -tlpn | grep "mysql"Īnother commonly encountered connection error is “ (2003) Can’t connect to MySQL server on ‘server’ (10061)”, which means that the network connection has been refused. To find the port the server is listening on, use the netstat command as shown. ![]() In addition, if the server is running as shown by the following command, but you still see the above error, you should also verify that the TCP/IP port is blocked by a firewall or any port blocking service. In such a case, you can try to restart it and check its status once more. $ sudo systemctl status mysqld #RHEL/CentOS/Fedoraįrom the output of the above command, the MySQL service has failed. $ sudo systemctl status mysql #Debian/Ubuntu To verify the MySQL service status, use the following command. $ sudo systemctl start mysqld #RHEL/CentOS/Fedora $ sudo systemctl start mysql #Debian/Ubuntu To start the server, run the following systemctl command. Therefore the client can’t connect to it. If the above commands show no output, then the database server isn’t running. This error indicates that there is no MySQL server (mysqld) running on the host system or that you have specified a wrong Unix socket file name or TCP/IP port when trying to connect to the server.Įnsure that the server is running by checking a process named mysqld on your database server host using the ps command and grep command together as shown.
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