UnsupportedClassVersionError

[Anjana Ravindran]

Getting error
java.lang.UnsupportedClassVersionError: org/apache/jsp/jsp/index_jsp

Problem shd be my environment variables or version incompatibility between jdk and oracle

Path
C:\Oracle\product\10.1.0\Client_1\bin;C:\Oracle\product\10.1.0\Client_1\jre\1.4.2\bin\client;C:\Oracle\product\10.1.0\Client_1\jre\1.4.2\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\Program Files\GemPlus\GemSafe Libraries User\Bin;C:\Program Files\Microsoft SQL Server\80\Tools\BINN

CLASSPATH
C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\activation.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\common_java.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\commons-dbcp-1.2.1.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\commons-lang-2.1.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\commons-logging.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\commons-pool-1.2.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\CuisBeans.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\jcommon-1.0.0-rc1.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\mail.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\servlet.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\servlet-api.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\struts.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\strutscommons.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\tools.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\userlookup.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\wssolite-filter.jar;C:\Program Files\jakarta-tomcat-5.0.28\webapps\cvisit\WEB-INF\lib\classes12.zip

JAVA_HOME
C:\Oracle\product\10.1.0\Client_1\jdk

Versions
JDK version in Oracle - JDK 1.4.2
Tomcat runs using JAVA_HOME, so uses jdk 1.4.2

Can you please help me in finding out wats the problem and how to solve the same

[Ernest Friedman-Hill]

THis is just the obvious JDK1.5/JDK1.4 confusion, but the proper fix may be Tomcat-specific, so I'm going to move this to our Tomcat forum.

[Anjana Ravindran]

Problem is fixed. But i am quite puzzled by this behavior. Please help me in reasoning out.

I have jdk 3 places in my places
1. One i downloaded earlier - C:\j2sdk1.4.2 (jdk version - 1.4.2)
2. Another got installed on installing oracle - C:\Oracle\product\10.1.0\Client_1\jdk (jdk version 1.4.2)
3. Another got installed on installing j2ee sdk - C:\Sun\AppServer\jdk (jdk version 5.0)

I have 2 environment variables pointing to jdk - Path and JAVA_HOME

I am trying to run a web application which runs on tomcat server. Tomcat refers JAVA_HOME variable for jdk reference. Oracle uses Path environment variable for jdk reference.
I like to have both of them to point to same jdk so there wont be any problem.

If i make both of them to point to Oracle jdk as given below
Path - C:\Oracle\product\10.1.0\Client_1\bin;
JAVA_HOME - C:\Oracle\product\10.1.0\Client_1\jdk

Oracle is working and my web application gives the following error
java.lang.UnsupportedClassVersionError: org/apache/jsp/jsp/index_jsp (Unsupported major.minor version 49.0)

If i make changes as given below,
Path - C:\Oracle\product\10.1.0\Client_1\bin;
JAVA_HOME - C:\Sun\AppServer\jdk
Both Oracle and web application is working.

Please let me know why it is giving error saying unsupported version if i make both of them same.

[Naseem Khan]

Such type of problem come when the version of compiler and interpreter is not same.

Naseem

[Anjana Ravindran]

How do i find the version of compiler and interpreter? Just like to know whats really going on.

[Ben Souther]

On *nix boxes, I use the "which" command and look at the path:
The 'java' command has a -version option.

 
[bsouther@bsouther bsouther]$ which java
/usr/local/j2sdk1.4.2_05/bin/java
[bsouther@bsouther bsouther]$ which javac
/usr/local/j2sdk1.4.2_05/bin/javac
[bsouther@bsouther bsouther]$ java -version
java version "1.4.2_05"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_05-b04)
Java HotSpot(TM) Client VM (build 1.4.2_05-b04, mixed mode)
[bsouther@bsouther bsouther]$