Re: "wrong version 49.0"

Phillip Mangwiro Wed, 10 Nov 2004 06:13:52 -0800

Wei Wei wrote:

After installed 5.0.29 TC, I tried to bring up the new application I just start 
today. I get the following error message. Can some tell me what is wrong here.
2004-11-04 10:42:39 StandardWrapperValve[jsp]: Servlet.service() for servlet 
jsp threw exception
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 
5.0\work\Catalina\localhost\gallery\org\apache\jsp\index_jsp.java:7: cannot 
access java.lang.Object
Generated servlet error:
bad class file: C:\Program 
Files\Java\jre1.5.0\lib\rt.jar(java/lang/Object.class)
class file has wrong version 49.0, should be 48.0
Please remove or make sure it appears in the correct subdirectory of the 
classpath.
public final class index_jsp extends org.apache.jasper.runtime.HttpJspBase
            ^
1 error
        at 
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
        at 
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
        at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:432)
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:492)
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:471)
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:459)
        at 
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
        at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
        at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
        at 
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at 
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
        at 
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
        at 
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
        at 
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
        at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at 
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
        at 
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
        at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
        at 
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
        at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Unknown Source)
2004-11-04 10:44:25 StandardWrapperValve[jsp]: Servlet.service() for servlet 
jsp threw exception
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 
5.0\work\Catalina\localhost\gallery\org\apache\jsp\index_jsp.java:7: cannot 
access java.lang.Object
Generated servlet error:
bad class file: C:\Program 
Files\Java\jre1.5.0\lib\rt.jar(java/lang/Object.class)
class file has wrong version 49.0, should be 48.0
Please remove or make sure it appears in the correct subdirectory of the 
classpath.
public final class index_jsp extends org.apache.jasper.runtime.HttpJspBase
            ^
1 error
at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84) at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332) at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:432) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:492) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:471) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:459) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Unknown Source)

It's probably because your Tomcat installation is trying to use JDK 1.4.x tools on a JDK 1.5.x installation. The 1.4 tools cannot understand the 1.5 class format. Try upgrading your tomcat to 5.5. It works with 1.5.

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Re: "wrong version 49.0"

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