应用程序中出现 java 库错误
我有一个部署在 WebSphere 上的 Web 应用程序，它使用一个 java 库来生成 excel 格式的文件，但我在 WebSphere 中收到以下错误，但它可以在 TOMCAT 服务器上正常工作。
问题可能是什么？
错误是：-
错误 500：java.lang.LinkageError：定义类时发生 LinkageError：
jxl.format.CellFormat 无法定义，因为： (jxl/format/CellFormat) 偏移量 = 6 处的主版本错误 这通常是由于在类加载器层次结构中的多个位置定义了一个类而导致的。其他潜在原因包括针对具有不兼容方法签名的旧版本或新版本的类进行编译。转储当前上下文类加载器层次结构：==>指示定义类加载器 ==>[0] com.ibm.ws.classloader.CompoundClassLoader@50c450c4 本地类路径：C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2。 war\WEB-INF\classes;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\activation-1.1.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\axis.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\cglib-nodep-2.2.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\commons-discovery-0.2.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\commons-logging.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\commons-net-2.0.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\commons-net-ftp-2.0.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\dom4j-1.6.1.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\iText-5.0.6.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\jaxrpc.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\jdom-1.1.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\jettison-1.0.1.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\joda-time-1.6.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\json-rpc-1.0.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\jxl.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\mail-1.4.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\ojdbc14.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\quartz-all-1.5.2.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\saaj.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\scheduler-plugin-example.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\scheduler-plugin.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\servlet-api.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\sqljdbc.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\stax-1.2.0.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\stax-api-1.0.1.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\wsdl4j.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\wstx-asl-3.2.7.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xml-writer-0.2.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xom-1.1.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xpp3_min-1.1.4c.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xstream-1.3.1.jar;C:\Program文件\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xstream-benchmark-1.3.1.jar;C:\Program Files\IBM\WebSphere\ AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war委派模式：PARENT_FIRST [1] com.ibm.ws.classloader.JarClassLoader@738995212 本地类路径：委派模式：PARENT_FIRST [2] com.ibm.ws.classloader.ProtectionClassLoader@60e060e0 [3] com.ibm.ws.bootstrap。 ExtClassLoader@70567056 [4] org.eclipse.osgi.framework.adaptor.core.CDSBundleClassLoader@4e024e02 [5] sun.misc.Launcher$AppClassLoader@6b806b80 [6] sun.misc.Launcher$ExtClassLoader@3fe03fe ---原始异常--- java.lang .UnsupportedClassVersionError：(jxl/format/CellFormat) 错误的主要版本位于 offset=6 处java.lang.ClassLoader.defineClassImpl(Native Method) 在 java.lang.ClassLoader.defineClass(ClassLoader.java:222) 在 java.security.SecureClassLoader.defineClass(SecureClassLoader.java:148) 在 com.ibm.ws.classloader。 CompoundClassLoader._defineClass(CompoundClassLoader.java:526) 位于com.ibm.ws.classloader.CompoundClassLoader.findClass(CompoundClassLoader.java:477) 位于......................
I have a web application that is deployed on WebSphere and that use one java library to generate files in excel format but I am getting the following error in WebSphere, but it will work fine with the TOMCAT server.
What can the problem be?
ERROR IS :-
Error 500: java.lang.LinkageError: LinkageError while defining class:
jxl.format.CellFormat Could not be defined due to: (jxl/format/CellFormat) bad major version at offset=6 This is often caused by having a class defined at multiple locations within the classloader hierarchy. Other potential causes include compiling against an older or newer version of the class that has an incompatible method signature. Dumping the current context classloader hierarchy: ==> indicates defining classloader ==>[0] com.ibm.ws.classloader.CompoundClassLoader@50c450c4 Local ClassPath: C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\classes;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\activation-1.1.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\axis.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\cglib-nodep-2.2.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\commons-discovery-0.2.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\commons-logging.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\commons-net-2.0.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\commons-net-ftp-2.0.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\dom4j-1.6.1.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\iText-5.0.6.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\jaxrpc.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\jdom-1.1.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\jettison-1.0.1.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\joda-time-1.6.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\json-rpc-1.0.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\jxl.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\mail-1.4.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\ojdbc14.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\quartz-all-1.5.2.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\saaj.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\scheduler-plugin-example.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\scheduler-plugin.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\servlet-api.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\sqljdbc.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\stax-1.2.0.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\stax-api-1.0.1.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\wsdl4j.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\wstx-asl-3.2.7.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xml-writer-0.2.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xom-1.1.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xpp3_min-1.1.4c.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xstream-1.3.1.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war\WEB-INF\lib\xstream-benchmark-1.3.1.jar;C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01\installedApps\yagneshNode01Cell\apptoolv2.ear\apptoolv2.war Delegation Mode: PARENT_FIRST [1] com.ibm.ws.classloader.JarClassLoader@738995212 Local Classpath: Delegation mode: PARENT_FIRST [2] com.ibm.ws.classloader.ProtectionClassLoader@60e060e0 [3] com.ibm.ws.bootstrap.ExtClassLoader@70567056 [4] org.eclipse.osgi.framework.adaptor.core.CDSBundleClassLoader@4e024e02 [5] sun.misc.Launcher$AppClassLoader@6b806b80 [6] sun.misc.Launcher$ExtClassLoader@3fe03fe ---Original exception--- java.lang.UnsupportedClassVersionError: (jxl/format/CellFormat) bad major version at offset=6 at java.lang.ClassLoader.defineClassImpl(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:222) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:148) at com.ibm.ws.classloader.CompoundClassLoader._defineClass(CompoundClassLoader.java:526) at com.ibm.ws.classloader.CompoundClassLoader.findClass(CompoundClassLoader.java:477) at .............
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问题在于：
您正在使用为应用程序服务器不支持的 Java 版本编译的 JExcel 库。您需要重新编译该库或迁移到较新版本的 WebSphere Application Server。
（该产品在所有 LinkageError 的类加载器转储中打印相同的“在多个位置定义”错误，无论该文本是否实际相关，直到 6.1.0.21 左右为止。）
This is the problem:
You're using a JExcel library compiled for a version of Java that your application server does not support. You'll either need to recompile the library or move to a newer version of WebSphere Application Server.
(The product printed the same "defined at multiple locations" error with class loader dump for all LinkageError, regardless of whether that text is actually relevant, until around 6.1.0.21.)
看起来您已经在 CLASSPATH 中两次获得了 Andy Khan 的 JExcel 库。查看 WebSphere 是否附带它。如果是这样，请从应用程序 WEB-INF/lib 中删除您的应用程序，看看是否有帮助。
Looks like you've got Andy Khan's JExcel library in the CLASSPATH twice. See if WebSphere ships with it. If it does, remove yours from the application WEB-INF/lib and see if that helps.