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Asked: 2026-05-10T21:49:30+00:00

Does anybody know what’s going on here: I run hibernate 3.2.6 against a PostgreSQL

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Does anybody know what’s going on here:

I run hibernate 3.2.6 against a PostgreSQL 8.3 (installed via fink) database on my Mac OS X. The setup works fine when I use Java 6 and the JDBC 4 driver (postgresql-8.3-603.jdbc4). However, I need this stuff to work with Java 5 and (hence) JDBC 3 (postgresql-8.3-603.jdbc3). When I change the jar in the classpath and switch to Java 5 (I do this in eclipse), I get the following error:

Exception in thread 'main' org.hibernate.exception.JDBCConnectionException: Cannot open connection     at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74) <Rows clipped for readability> Caused by: java.sql.SQLException: No suitable driver     at java.sql.DriverManager.getConnection(DriverManager.java:545)     at java.sql.DriverManager.getConnection(DriverManager.java:140)     at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)     at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)

What’s the problem here? I cannot see it. Here is my hibernate configuration:

<hibernate-configuration>      <session-factory>         <property name='connection.url'>jdbc:postgresql:test</property>         <property name='connection.username'>postgres</property>         <property name='connection.password'>p</property>         <property name='connection.pool_size'>1</property>         <property name='dialect'>org.hibernate.dialect.PostgreSQLDialect</property>         <property name='current_session_context_class'>thread</property>         <property name='show_sql'>true</property>         <mapping resource='com/mydomain/MyClass.hbm.xml'/>     </session-factory> </hibernate-configuration>

EDIT: The longer, more usual form of the connection URL: jdbc:postgresql://localhost/test has the exact same behaviour.

The driver jar is definitely in the classpath, and I also do not manage to get any errors with this direct JDBC test code:

public static void main(String[] args) throws Exception {   Class.forName('org.postgresql.Driver');     Connection con=DriverManager.getConnection('jdbc:postgresql://localhost/test','postgres', 'p'); }
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1 Answer

  1. I don’t see you specifying the driver class in your Hibernate configuration. Try adding the following:

    <hibernate-configuration>     <session-factory>         .         .         <property name='connection.driver_class'>org.postgresql.Driver</property>         .     </session-factory> </hibernate-configuration>
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