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Subject: Re: Unable to create Datasource
From: Kevan Miller <kevan.miller@gmail.com>
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 <CAE6fQc9Qu+-e4i4rNAtF0npYOYOcf=zWNxgobaeW=X_GA-C2wA@mail.gmail.com>
Date: Thu, 17 May 2012 10:24:41 -0400
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 <CAE6fQc9Qu+-e4i4rNAtF0npYOYOcf=zWNxgobaeW=X_GA-C2wA@mail.gmail.com>
To: user@geronimo.apache.org


On May 17, 2012, at 4:37 AM, sai charan wrote:

> Hello,
>=20
> I have installed Geronimo 2.0.1 in one machine and MS SQL Server 2005 =
in an another machine , while i was trying to configure the database =
connection pool i am unable to create datasource, I found the logs in =
the command prompt please find below:
>=20
>=20
<snip>
...
> jvm 1    | java.lang.UnsupportedClassVersionError: Bad version number =
in .class
> file
> jvm 1    |      at java.lang.ClassLoader.defineClass1(Native Method)
> jvm 1    |      at =
java.lang.ClassLoader.defineClass(ClassLoader.java:620)
> jvm 1    |      at =
java.security.SecureClassLoader.defineClass(SecureClassLoader
> .java:124)
> jvm 1    |      at =
java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
> jvm 1    |      at =
java.net.URLClassLoader.access$100(URLClassLoader.java:56)
> jvm 1    |      at =
java.net.URLClassLoader$1.run(URLClassLoader.java:195)
> jvm 1    |      at java.security.AccessController.doPrivileged(Native =
Method)
> jvm 1    |      at =
java.net.URLClassLoader.findClass(URLClassLoader.java:188)
> jvm 1    |      at =
java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> jvm 1    |      at =
java.lang.ClassLoader.loadClass(ClassLoader.java:251)
> jvm 1    |      at =
org.apache.geronimo.console.databasemanager.wizard.DatabasePo
> olPortlet.attemptDriverLoad(DatabasePoolPortlet.java:1177)
...
<snip>
>=20
> Please suggest me the steps to complete this task. I need this in an =
urgency.... I would really appreciate if i get any response from you.

One general point -- Geronimo 2.0.1 is pretty old. If you you need a =
Java EE 5 server, I'd suggest Geronimo 2.1.8 (or 2.2.1).

What version of Java are you running?

You are almost certainly getting this error because you are running a =
version of Java which is older than the version of Java which was used =
to compile some of your classes. It's really a bit more complex than =
this. The javac parameters -source and -target control what JVM class =
file format will be generated by javac (e.g. Java 6 compiler can =
generate Java 5 class files, but not vice versa).=20

In your case, I'd say for example you are running Java 1.5 and some of =
your classes were compiled for Java 6. Each class has a Java version =
identifier. When your Java 1.5 JVM loads a Java 6 class, the 1.5 JVM =
detects that the Java 6 class version number is not supported and throws =
this exception=85

I'd assume your attempting to run classes (e.g. from your jdbc driver) =
that are not compatible with the version of java you're using to run =
geronimo. You either need to recompile your classes or move to a newer =
version of java.

--kevan