JDBC RapidMiner OrientDB connection giving a NullPointerException

kwoxer
kwoxer New Altair Community Member
edited November 2024 in Community Q&A
Well I don't really know if it is RapidMiner or OrientDB related. But anyways.

http://i.imgur.com/PpFMCgM.png 
Exception: java.lang.NullPointerException
Message: null
Stack trace:

  com.rapidminer.tools.jdbc.StatementCreator.buildTypeMap(StatementCreator.java:86)
  com.rapidminer.tools.jdbc.StatementCreator.<init>(StatementCreator.java:65)
  com.rapidminer.tools.jdbc.StatementCreator.<init>(StatementCreator.java:60)
  com.rapidminer.tools.jdbc.DatabaseHandler.connect(DatabaseHandler.java:337)
  com.rapidminer.tools.jdbc.DatabaseHandler.getConnectedDatabaseHandler(DatabaseHandler.java:258)
  com.rapidminer.tools.jdbc.connection.DatabaseConnectionService.testConnection(DatabaseConnectionService.java:303)
  com.rapidminer.gui.tools.dialogs.DatabaseConnectionDialog$12$1.run(DatabaseConnectionDialog.java:439)
  com.rapidminer.gui.tools.ProgressThread$2.run(ProgressThread.java:200)
  java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
  java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  java.lang.Thread.run(Unknown Source)
That is the stack. I have the server running. The JAR I use is http://www.orientdb.org/portal/function/portal/download/unknown@unknown.com/-/-/-/-/-/orientdb-jdbc-2.0-SNAPSHOT-all.jar/false/false/multi

It is the really latest version. So somehow it seems that RapidMiner returning some strange things?
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Answers

  • Marco_Boeck
    Marco_Boeck New Altair Community Member
    Hi,

    which version of RapidMiner Studio are you using? Line numbers do not match with what I have here.

    Regards,
    Marco
  • kwoxer
    kwoxer New Altair Community Member
    Ohh yeah sorry.

    I'm using RapidMiner 5.3.015 and OrientDB 2.0M2.
  • Marco_Boeck
    Marco_Boeck New Altair Community Member
    Hi,

    I'd say it looks like a driver bug. Reason for the error is that the driver returns no type info for the DB connection. In other words, java.sql.DatabaseMetaData#getTypeInfo() returns null although according to specification it should not.

    Regards,
    Marco
  • kwoxer
    kwoxer New Altair Community Member
    Alright, I already contected them now. They say it will be fixed soon.

    Thank you.
  • kwoxer
    kwoxer New Altair Community Member
    The new Version of the OrientDB-JDBC project fixed this issue.

    Thank you again.

    Also written a Tutorial about this in German:
    http://www.kwoxer.de/2014/11/05/rapidminer-mit-orientdb-jdbc-verbinden-tutorial/

    In case someone is interested.

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