症状

The following errors may appear in atlassian-crowd.log file:

2013-02-14 15:26:22,877 main ERROR [org.hibernate.connection.C3P0ConnectionProvider] JDBC Driver class not found: com.mysql.jdbc.Driver
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

2017-11-01 15:34:53,393 http-bio-8095-exec-11 ERROR [console.action.setup.Database] Unable to connect to database: java.sql.SQLException: No suitable driver found for jdbc:postgresql://localhost:5432
com.atlassian.config.bootstrap.BootstrapException: java.sql.SQLException: No suitable driver found for jdbc:postgresql://localhost:5432

Cause #1

JDBC driver is not loaded

The appropriate JDBC driver (in the example above, the MySQL jdbc driver) has not been installed

ソリューション #1

Download the latest driver from the manufacturer's website and insert it into <crowd-install>/apache-tomcat/lib directory.

Cause #2

JDBC URL is in wrong syntax

Entering the wrong JDBC URL syntax will throw a similar error:

ソリューション #2

Check the default JDBC URL to access the database provided by Crowd and make sure you are using the correct syntax.

In the case above, we are not specifying which database Crowd will connect with. The correct syntax would be like:

jdbc:postgresql://localhost:5432/crowd