UnsupportedClassVersionError:JVMCFRE003bad 问题分析与解决

 问题分析

com.ibm.ws.webcontainer.annotation.WASAnnotationHelpercollectClasses unable to instantiate class

                                  java.lang.UnsupportedClassVersionError:JVMCFRE003 bad major version;class=com/soa/listener/SpringContextLoaderListener, offset=6

        at java.lang.ClassLoader.defineClassImpl(NativeMethod) at java.lang.ClassLoader.defineClass(ClassLoader.java:28

//解决方案与方法如下:

http://stackoverflow.com/questions/14926402/unsupportedclassversionerror-jvmcfre003-bad-major-version-in-websphere-as-7

up vote 17 down vote accepted

WebSphere Application Server V7 does support Java Platform, Standard Edition (Java SE) 6 (seeSpecifications and API documentation in the Network Deployment (All operating systems), Version 7.0 Information Center) and it's since the release V8.5 when Java 7 has been supported. I couldn't find the Java 6 SDK documentation, and could only consult IBM JVM Messages in Java 7 Windows documentation. Alas, I couldn't find the error message in the documentation either. Since java.lang.UnsupportedClassVersionError is "Thrown when the Java Virtual Machine attempts to read a class file and determines that the major and minor version numbers in the file are not supported.", you ran into an issue of building the application with more recent version of Java than the one supported by the runtime environment, i.e. WebSphere Application Server 7.0. I may be mistaken, but I think that offset=6 in the message is to let you know what position caused the incompatibility issue to occur. It's irrelevant for you, for me, and for many other people, but some might find it useful, esp. when they generate bytecode themselves. Run the versionInfo command to find out about the Installed Features of WebSphere Application Server V7, e.g. C:\IBM\WebSphere\AppServer>.\bin\versionInfo.bat WVER0010I: Copyright (c) IBM Corporation 2002, 2005, 2008; All rights reserved. WVER0012I: VersionInfo reporter version 1.15.1.47, dated 10/18/11 -------------------------------------------------------------------------------- IBM WebSphere Product Installation Status Report -------------------------------------------------------------------------------- Report at date and time February 19, 2013 8:07:20 AM EST Installation -------------------------------------------------------------------------------- Product Directory C:\IBM\WebSphere\AppServer Version Directory C:\IBM\WebSphere\AppServer\properties\version DTD Directory C:\IBM\WebSphere\AppServer\properties\version\dtd Log Directory C:\ProgramData\IBM\Installation Manager\logs Product List -------------------------------------------------------------------------------- BPMPC installed ND installed WBM installed Installed Product -------------------------------------------------------------------------------- Name IBM Business Process Manager Advanced V8.0 Version 8.0.1.0 ID BPMPC Build Level 20121102-1733 Build Date 11/2/12 Package com.ibm.bpm.ADV.V80_8.0.1000.20121102_2136 Architecture x86-64 (64 bit) Installed Features Non-production Business Process Manager Advanced - Client (always installed) Optional Languages German Russian Korean Brazilian Portuguese Italian French Hungarian Simplified Chinese Spanish Czech Traditional Chinese Japanese Polish Romanian Installed Product -------------------------------------------------------------------------------- Name IBM WebSphere Application Server Network Deployment Version 8.0.0.5 ID ND Build Level cf051243.01 Build Date 10/22/12 Package com.ibm.websphere.ND.v80_8.0.5.20121022_1902 Architecture x86-64 (64 bit) Installed Features IBM 64-bit SDK for Java, Version 6 EJBDeploy tool for pre-EJB 3.0 modules Embeddable EJB container Sample applications Stand-alone thin clients and resource adapters Optional Languages German Russian Korean Brazilian Portuguese Italian French Hungarian Simplified Chinese Spanish Czech Traditional Chinese Japanese Polish Romanian Installed Product -------------------------------------------------------------------------------- Name IBM Business Monitor Version 8.0.1.0 ID WBM Build Level 20121102-1733 Build Date 11/2/12 Package com.ibm.websphere.MON.V80_8.0.1000.20121102_2222 Architecture x86-64 (64 bit) Optional Languages German Russian Korean Brazilian Portuguese Italian French Hungarian Simplified Chinese Spanish Czech Traditional Chinese Japanese Polish Romanian -------------------------------------------------------------------------------- End Installation Status Report -------------------------------------------------------------------------------- share improve this answer answered  Feb 19 '13 at 13:11 Jacek Laskowski 12.3k 4 39 80

1   hi i have same problem but i cannot understand how to fix it. Can you provide some direct answer for this issue –  Himanshu  Mar 27 '13 at 18:14 i am using webspare 8.5 where webspare use 1.6 internal and my eclipse compiler 1.7 –  Himanshu  Mar 27 '13 at 18:16 5   If you use a Java 7 compiler and target a Java 6 environment you need to set up the higher-version compiler to generate 1.6-compliant bytecode. See -source and -target options of javac. –  Jacek Laskowski Apr 2 '13 at 12:55 add a comment

up vote 2 down vote	In this Eclipse Preferences panel you can change the compiler compatibility from 1.7 to 1.6. This solved the similar message I was getting. For Eclipse, it is under: Preferences -> Java -> Compiler: 'Compiler compliance level' share improve this answer answered  Oct 11 '13 at 18:32 V.. 21 1
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up vote 2 down vote	This error can occur if you project is compiling with JDK 1.6 and you have dependencies compiled with Java 7. share improve this answer answered  Jan 8 '14 at 14:48 ozOli 461 2 6
	Exactly. This normally happens in maven projects –  Kris  May 27 at 21:06 add a comment

up vote 2 down vote	You should also make sure you have set appropriate Project Facets Java version. Module Properties -> Project Facets -> Java 1.6 should be checked share improve this answer answered  May 23 '14 at 14:48 Marik Palyg 21 2
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up vote 1 down vote

I was getting this error in websphere 8.5: java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major version; class=com/xxx/Whatever, offset=6 I had my project JDK level set at 1.7 in eclipse and was8 by default runs on JDK 1.6 so there was a clash. I had to install the optional SDK 1.7 to my websphere server and then the problem went away. I guess I could have also set my project level down to 1.6 in eclipse but I wanted to code to 1.7. share improve this answer answered  Feb 3 '14 at 22:48 Glenn 11 1

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up vote 0 down vote

I was getting the same error. In the Project Facets of my Java project, the Java compile level was set to 1.7 whereas the WebSphere Application Server v7.0 had a Runtime Composition of JRE v1.6; setting the Java compile level to 1.6 in Project Facets got rid of the error. I did not have to change the Compiler compliance level though, it's still 1.7. Hope this helps! share improve this answer answered  Apr 16 '14 at 19:27 Prince 5,912 3 12 37

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At first you should check major version of compiled problematic .class file, in your case map/CareMonths. See this answer how to do it. WAS7 uses Java 6 (as said Jacek), and Java 6 uses major version 50, so you have to compile your project with Java 6. How to set proper version of Java compiler depends on your IDE (e.g. Eclipse, IntelliJ) or build tool (e.g. Maven, Ant).