我正在使用GWT SDK 2.8.1，如果我想启动GWT开发模式，我将获得以下堆栈跟踪：
Super Dev Mode starting up
workDir: C:\Users\ss\AppData\Local\Temp\gwt-codeserver-7510213776616835391.tmp
java.lang.NoSuchMethodError: org.slf4j.helpers.MessageFormatter.arrayFormat(Ljava/lang/String;[Ljava/lang/Object;)Lorg/slf4j/helpers/FormattingTuple;
at org.eclipse.jetty.util.log.JettyAwareLogger.log(JettyAwareLogger.java:619)
at org.eclipse.jetty.util.log.JettyAwareLogger.info(JettyAwareLogger.java:314)
at org.eclipse.jetty.util.log.Slf4jLog.info(Slf4jLog.java:74)
at org.eclipse.jetty.util.log.Log.initialized(Log.java:186)
at org.eclipse.jetty.util.log.Log.getLogger(Log.java:288)
at org.eclipse.jetty.util.log.Log.getLogger(Log.java:278)
at org.eclipse.jetty.http.MimeTypes.<clinit>(MimeTypes.java:168)
at com.google.gwt.dev.codeserver.WebServer.<clinit>(WebServer.java:90)
at com.google.gwt.dev.codeserver.SourceHandler.<clinit>(SourceHandler.java:63)
at com.google.gwt.dev.codeserver.Recompiler.loadModule(Recompiler.java:500)
at com.google.gwt.dev.codeserver.Recompiler.initWithoutPrecompile(Recompiler.java:204)
at com.google.gwt.dev.codeserver.Outbox.maybePrecompile(Outbox.java:89)
at com.google.gwt.dev.codeserver.Outbox.<init>(Outbox.java:61)
at com.google.gwt.dev.codeserver.CodeServer.makeOutboxTable(CodeServer.java:192)
at com.google.gwt.dev.codeserver.CodeServer.start(CodeServer.java:151)
at com.google.gwt.dev.codeserver.CodeServer.main(CodeServer.java:104)
at com.google.gwt.dev.codeserver.CodeServer.main(CodeServer.java:55)