Unsupported version error using JTDS with Scala
java, jtds, scala, spray
Solution
Yes, your Java runtime is too old, according to Java class file format:
- J2SE 7 = 51 (0x33 hex),
- J2SE 6.0 = 50 (0x32 hex),
- J2SE 5.0 = 49 (0x31 hex),
- JDK 1.4 = 48 (0x30 hex),
- JDK 1.3 = 47 (0x2F hex),
- JDK 1.2 = 46 (0x2E hex),
- JDK 1.1 = 45 (0x2D hex).
51.0 means you need Java 7 to run some of the classes in your project. And you are right it's jTDS that's causing the problem (from jTDS JDBC Driver 1.2.7 and 1.3.0 released):
Version 1.3.0 is the first Java 7 compatible version of the driver and
Either upgrade to Java 7 (always a good idea) or downgrade to some older jTDS driver.
Problem
I'm trying to use the Java JTDS driver to connect to my database in Scala . However, whenever I try to use it I get an error that the version(of java?) is wrong. java.lang.UnsupportedClassVersionError: net/sourceforge/jtds/jdbcx/JtdsDataSource : Unsupported major.minor version 51.0 ``` object DaoDriverAdaptor { import java.sql.{DriverManager, Connection} private def loadDriver() { try { Class.forName("net.sourceforge.jtds.jdbcx.JtdsDataSource") } catch { case e: Exception => { println("ERROR: Driver not available: " + e.getMessage) throw e } } } ``` - Scala version : 2.9.2 - Java Version : 1.6 - Using jtds 1.3.0 - Output of java -version: java version "1.6.0_35" Java(TM) SE Runtime Environment (build 1.6.0_35-b10-428-11M3811) Java HotSpot(TM) 64-Bit Server VM (build 20.10-b01-428, mixed mode)