I'm using Hibernate 3.3, Tomcat 6, and Eclipse Galileo and I get the following exception from Configuration.configure().buildSessionFactory():

13:00:35,843 INFO SessionFactoryObjectFactory:109 - Factory name: java:comp/env/jdbc/bmf
13:00:35,843 INFO NamingHelper:49 - JNDI InitialContext properties:{}
13:00:35,843 WARN SessionFactoryObjectFactory:121 - Could not bind factory to JNDI
javax.naming.NamingException: Context is read only
at org.apache.naming.NamingContext.checkWritable(NamingContext.java:903)
at org.apache.naming.NamingContext.bind(NamingContext.java:831)
at org.apache.naming.NamingContext.rebind(NamingContext.java:208)
at org.hibernate.util.NamingHelper.bind(NamingHelper.java:97)
at org.hibernate.impl.SessionFactoryObjectFactory.addInstance(SessionFactoryObjectFactory.java:113)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:348)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1341)
...

The contents of hibernate.cfg.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory name="java:comp/env/jdbc/bmf">
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<mapping class="com.bmf.db.BMFUser" resource="com/bmf/db/BMFUser.hbm.xml"/>
<mapping class="com.bmf.db.BMFWager" resource="com/bmf/db/BMFWager.hbm.xml"/>
<mapping class="com.bmf.db.WagerParty" resource="com/bmf/db/WagerParty.hbm.xml"/>
</session-factory>
</hibernate-configuration>

I put the data source in the Tomcat server context.xml as follows:

<?xml version="1.0" encoding="UTF-8"?>
<Context privileged="true" reloadable="true">
....
<Resource name="jdbc/bmf" auth="Container"
type="javax.sql.DataSource"
username="root" password="admin"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/bmf"/>
</Context>

I read somewhere else that Tomcat creates read-only JNDI entries, but don't have clue how to get around it. I'd like to be able to do this without coding a JNDI context with a javax.sql.DataSource in it, and even then I'm not sure that it'll work.

I think I must be missing something really obvious, so apologies if that's the case.