URGENT! Elastic search: Unable to perform jdbc query because of Exception when executing JDBC query

Elastic Stack Logstash
1

I have a sample logstash conf file, However when I. run it I can see a logstash error caused
Error is

    [371de1f7cad8c35c02e4a3047ec831da42b9b5048183b45a3916162ab248f3f7] Exception when executing JDBC query {:exception=>"Java::ComMysqlCjJdbcExceptions::CommunicationsException: Communications link failure\n\nThe last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server."}
Below is the logstash config file:

    input {
      jdbc {
        jdbc_driver_library => "/usr/share/logstash/mysql-connector-java-8.0.22.jar"
        jdbc_driver_class => "com.mysql.cj.jdbc.Driver"
        jdbc_connection_string => "jdbc:mysql://xxx-1.x-xxxefxxxdxxxo3.us-east-2.rds.amazonaws.com:3306/sercdb_dev"
        jdbc_user => "user"
        jdbc_password => "pass"
        sql_log_level => "debug"  # Set Logstash logging level as this
        clean_run => true # Set to true for indexing from scratch
        record_last_run => false
    	tracking_column => "id"
        statement => "SELECT * FROM people"
      }
    }
    
    ## Add your filters / logstash plugins configuration here
    
    output {
    	elasticsearch {
    		hosts => "elasticsearch:9200"
    		user => "elastic"
    		password => "elastic"
    		ecs_compatibility => disabled
    		index => "users"
        	action => "index"
        	document_id => "%{id}"
    	}
    }
2

Are you sure that the jdbc_connection_string is correct? A communication link failure exception usually happens when jdbc is not able to connect at all.
This could be because of a TLS error, or your bind-address for your mysql server is not 0.0.0.0, your port is incorrect or not listening, your sql server is not running, a firewall is preventing external connections, and much more. You need to check all the basics first.