JMeter connection MySQL Database error cannot create poolableconnectionfactory (Could not create connection to database server.)

Today you are learning JMeter's JDBC sampler and find that after configuring the JDBC Connection configuration and JDBC request, click Run. To display the response data in the View results tree:

Cannot create poolableconnectionfactory (Could not create connection to database server.)

After trying several methods, it was found that the MySQL driver version was too low to cause.

When an error occurs, My JMeter version is the 3.1,JDK version is the 1.8,mysql version is the 8.0.11,mysql-connector-java version is 5.1.31, and later changed Mysql-connector-java to the latest version mysql-connector-java-5 After the. 1.46-bin.jar, the operation succeeds.

JMeter connection MySQL Database error cannot create poolableconnectionfactory (Could not create connection to database server.)