以前我使用tomcat 7.0.30，最近我转到了tomcat 8.0.21
之后，每当我试图访问我的应用程序时，它都会出现JSP编译错误，如下所示，
返回类型与JspSourceDependent.getDependents（）不兼容
以及以下错误，
对于类型JspFactory ，方法getJspApplicationContext（Servlet上下文）未定义
我也在使用GWT 2.7.0和SmartGWT PRO 4.1
你能提出解决这个问题的办法吗？我浏览了建议的链接，但没有帮助。将支柱更新为2.3.20
在下面发布带有-verbose的完整堆栈：类VM参数，
[Loaded org.apache.commons.lang3.BooleanUtils from file:/E:/apache-tomcat-8.0.21/webapps/UDMUI/WEB-INF/lib/gwt-dev.jar]
[Loaded com.opensymphony.xwork2.ognl.OgnlUtil$2 from file:/E:/apache-tomcat-8.0.21/webapps/UDMUI/WEB-INF/lib/xwork-core-2.3.20.jar]
[Loaded ognl.enhance.OrderedReturn from file:/E:/apache-tomcat-8.0.21/webapps/UDMUI/WEB-INF/lib/ognl-3.0.6.jar]
[Loaded ognl.ASTChain from file:/E:/apache-tomcat-8.0.21/webapps/UDMUI/WEB-INF/lib/ognl-3.0.6.jar]
[Loaded com.opensymphony.xwork2.util.reflection.ReflectionContextState from file:/E:/apache-tomcat-8.0.21/webapps/UDMUI/WEB-INF/lib/xwork-core-2.3.20.jar]
[Loaded ognl.Evaluation from file:/E:/apache-tomcat-8.0.21/webapps/UDMUI/WEB-INF/lib/ognl-3.0.6.jar]
[Loaded org.apache.jasper.compiler.Node$JspAttribute from file:/E:/apache-tomcat-8.0.21/lib/jasper.jar]
[Loaded java.util.Vector$ListItr from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded org.eclipse.jdt.internal.compiler.parser.RecoveryScanner from file:/E:/apache-tomcat-8.0.21/lib/ecj-4.4.2.jar]
[Loaded org.eclipse.jdt.internal.compiler.impl.CharConstant from file:/E:/apache-tomcat-8.0.21/lib/ecj-4.4.2.jar]
[Loaded org.eclipse.jdt.internal.compiler.impl.ByteConstant from file:/E:/apache-tomcat-8.0.21/lib/ecj-4.4.2.jar]
[Loaded org.eclipse.jdt.internal.compiler.ast.SynchronizedStatement from file:/E:/apache-tomcat-8.0.21/lib/ecj-4.4.2.jar]
[Loaded org.apache.jasper.compiler.JavacErrorDetail from file:/E:/apache-tomcat-8.0.21/lib/jasper.jar]
[Loaded org.apache.struts2.dispatcher.ActionContextCleanUp from file:/E:/apache-tomcat-8.0.21/webapps/UDMUI/WEB-INF/lib/struts2-core-2.3.20.jar]
Apr 08, 2015 3:51:27 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jsp] in context with path [/UDMUI] threw exception [Unable to compile class for JSP:
An error occurred at line: [43] in the generated java file: [E:apache-tomcat-8.0.21workCatalinalocalhostUDMUIorgapachejsploginlogin_jsp.java]
The return type is incompatible with JspSourceDependent.getDependants()
An error occurred at line: [56] in the generated java file: [E:apache-tomcat-8.0.21workCatalinalocalhostUDMUIorgapachejsploginlogin_jsp.java]
The method getJspApplicationContext(ServletContext) is undefined for the type JspFactory
Stacktrace:] with root cause
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [43] in the generated java file: [E:apache-tomcat-8.0.21workCatalinalocalhostUDMUIorgapachejsploginlogin_jsp.java]
The return type is incompatible with JspSourceDependent.getDependants()
An error occurred at line: [56] in the generated java file: [E:apache-tomcat-8.0.21workCatalinalocalhostUDMUIorgapachejsploginlogin_jsp.java]
The method getJspApplicationContext(ServletContext) is undefined for the type JspFactory
Stacktrace:
at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)
at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:198)
at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:450)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:361)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:336)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:323)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:580)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:356)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:428)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1517)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1474)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
[Loaded org.apache.catalina.util.RequestUtil from file:/E:/apache-tomcat-8.0.21/lib/catalina.jar]
[Loaded java.util.Scanner from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded java.util.regex.Pattern$All from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded java.util.regex.Pattern$6 from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded sun.misc.LRUCache from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded java.util.Scanner$1 from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded org.apache.tomcat.util.http.ValuesEnumerator from file:/E:/apache-tomcat-8.0.21/lib/tomcat-coyote.jar]
[Loaded org.apache.tomcat.util.http.parser.AcceptLanguage from file:/E:/apache-tomcat-8.0.21/lib/tomcat-coyote.jar]
[Loaded sun.util.locale.LanguageTag from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded sun.util.locale.ParseStatus from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded sun.util.locale.StringTokenIterator from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded sun.util.locale.InternalLocaleBuilder from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded sun.util.locale.InternalLocaleBuilder$CaseInsensitiveChar from C:Program FilesJavajdk1.7.0_75jrelibrt.jar]
[Loaded org.apache.catalina.util.ConcurrentDateFormat from file:/E:/apache-tomcat-8.0.21/lib/catalina.jar]
如果包含gwt-dev.jar文件，请将其删除。
我最近遇到了这个问题。当有一个包含JspFactory定义的冲突jar时，就会发生这种情况，如下所述-
对于类型JspFactory ，方法getJspApplicationContext（Servlet上下文）未定义
使用GWT，检查是否包含GWT-dev.jar文件。它还包含一个JSPFactory的定义。这就是我使用它时出现问题的原因。删除它。您可能在运行时不需要它，也不需要包含jar。