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What is the proper way of using OrientDB's JDBC driver with ActiveRecord? I am trying to connect a Rails 3.2 application to OrientDB 1.4. I installed the gem activerecord-jdbc-adapter , and configured the database.yml as follows: development: adapter: jdbc username: admin password: admin driver: com.orientechnologies.orient.jdbc.OrientJdbcDriver url: jdbc:orient:local:db/test_db2 I load the OrientDB's JDBC driver as follows: # in config/application.rb: require '/home/myuser/jars/orientdb-jdbc-1.4.0-all.jar' The following exception is being thrown when the application starts (using rails s ): java.lang.NullPointerException at arjdbc.jdbc.RubyJdbcConnection.unmarshalResult(RubyJdbcConnection.java:1187) at arjdbc.jdbc.RubyJdbcConnection.set_native_database_types(RubyJdbcConnection.java:537) at arjdbc.jdbc.RubyJdbcConnection$INVOKER$i$0$0$set_native_database_types.call(RubyJdbcConnection$INVOKER$i$0$0$set_native_database_types.gen) ... Is there something missing in my configuration? What is the proper way of using OrientDB's JDBC driver with ActiveRecord?

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