Sqoop does not come with the JDBC driver , as you already knew that sqoop is just a client tool it uses the JDBC driver to connect to data source in our case its MYSQL , if you look under the directory /var/lib/sqoop/ should have a MYSQL jdbc driver , internally it will take care of all the connections ,query execution , result sets etc . Since we are using localhost it will connect the locally runining server , if you want to access the remote server then we use 3306 , however you can also mention the port number when refering to localhost , i dont have the vm to see their socket file configuration . moreover you have to enforce the TCP/IP connection because by default when we use localhost it will refer the socket file . Hope this helps .
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