I have modified the hibernate PMs because the autocommit property given by jackrabbit was null and raised an NPE in hibernate config.
I replaced the code :
hibernateConfiguration.setProperty("hibernate.connection.autocommit", getAutocommit());
String autocommit = getAutocommit();
if (autocommit == null)
{
autocommit = "false";
}
hibernateConfiguration.setProperty("hibernate.connection.autocommit", autocommit);