我创建了一个简单的测试应用程序：
import java.util.logging.Logger;
import org.apache.catalina.Context;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.startup.Tomcat;
public class Main {
private final static Logger LOGGER = Logger.getLogger(Main.class.getName());
private final static String mWorkingDir = System.getProperty("java.io.tmpdir");
private static Tomcat tomcat = null;
public static void main(String[] args) {
tomcat = new Tomcat();
tomcat.setPort(8080);
tomcat.setBaseDir(mWorkingDir);
tomcat.getHost().setAppBase(mWorkingDir);
tomcat.getHost().setAutoDeploy(true);
tomcat.getHost().setDeployOnStartup(true);
try {
tomcat.start();
} catch (LifecycleException e) {
LOGGER.severe("Tomcat could not be started.");
e.printStackTrace();
}
LOGGER.info("Tomcat started on " + tomcat.getHost());
// Alternatively, you can specify a WAR file as last parameter in the following call e.g. "C:\\Users\\admin\\Desktop\\app.war"
Context appContext = Main.getTomcat().addWebapp(Main.getTomcat().getHost(), "/app", System.getProperty("user.dir")+"\\Whys.war");
LOGGER.info("Deployed " + appContext.getBaseName() + " as " + appContext.getBaseName());
tomcat.getServer().await();
}
public static Tomcat getTomcat(){
return tomcat;
}
}
当我从eclipse开始时，一切正常，但是当我将它导出到一个可运行的jar并运行它时我得到了这个错误：
HTTP状态500 - com.vaadin.server.ServiceException：java.lang.IllegalStateException：推送不可用。有关详细信息，请参阅以前的日志消息。
这是整个调用堆栈：
GRAVE: Failed to initialize Atmosphere Framework
java.lang.IllegalArgumentException: Unable to createclass org.atmosphere.container.JSR356AsyncSupport
at org.atmosphere.cpr.DefaultAsyncSupportResolver.newCometSupport(DefaultAsyncSupportResolver.java:229)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.resolveWebSocket(DefaultAsyncSupportResolver.java:288)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.resolve(DefaultAsyncSupportResolver.java:274)
at org.atmosphere.cpr.AtmosphereFramework.autoDetectContainer(AtmosphereFramework.java:1591)
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:717)
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:614)
at com.vaadin.server.communication.PushRequestHandler.<init>(PushRequestHandler.java:121)
at com.vaadin.server.VaadinServletService.createRequestHandlers(VaadinServletService.java:82)
at com.vaadin.server.VaadinService.init(VaadinService.java:186)
at com.vaadin.server.VaadinServlet.createServletService(VaadinServlet.java:258)
at com.vaadin.server.VaadinServlet.init(VaadinServlet.java:164)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:817)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
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.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$AbstractConnectionHandler.process(AbstractProtocol.java:668)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1527)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1484)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.newCometSupport(DefaultAsyncSupportResolver.java:225)
... 28 more
Caused by: java.lang.IllegalStateException: ServerContainer is null
at org.atmosphere.container.JSR356AsyncSupport.<init>(JSR356AsyncSupport.java:43)
... 33 more
ao¹t 12, 2015 8:32:04 PM com.vaadin.server.VaadinServletService createRequestHandlers
AVERTISSEMENT: Error initializing Atmosphere. Push will not work.
com.vaadin.server.ServiceException: Atmosphere init failed
at com.vaadin.server.communication.PushRequestHandler.<init>(PushRequestHandler.java:129)
at com.vaadin.server.VaadinServletService.createRequestHandlers(VaadinServletService.java:82)
at com.vaadin.server.VaadinService.init(VaadinService.java:186)
at com.vaadin.server.VaadinServlet.createServletService(VaadinServlet.java:258)
at com.vaadin.server.VaadinServlet.init(VaadinServlet.java:164)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:817)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
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.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.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1527)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1484)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.servlet.ServletException: java.lang.IllegalArgumentException: Unable to createclass org.atmosphere.container.JSR356AsyncSupport
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:741)
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:614)
at com.vaadin.server.communication.PushRequestHandler.<init>(PushRequestHandler.java:121)
... 22 more
Caused by: java.lang.IllegalArgumentException: Unable to createclass org.atmosphere.container.JSR356AsyncSupport
at org.atmosphere.cpr.DefaultAsyncSupportResolver.newCometSupport(DefaultAsyncSupportResolver.java:229)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.resolveWebSocket(DefaultAsyncSupportResolver.java:288)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.resolve(DefaultAsyncSupportResolver.java:274)
at org.atmosphere.cpr.AtmosphereFramework.autoDetectContainer(AtmosphereFramework.java:1591)
at org.atmosphere.cpr.AtmosphereFramework.init(AtmosphereFramework.java:717)
... 24 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.atmosphere.cpr.DefaultAsyncSupportResolver.newCometSupport(DefaultAsyncSupportResolver.java:225)
... 28 more
Caused by: java.lang.IllegalStateException: ServerContainer is null
at org.atmosphere.container.JSR356AsyncSupport.<init>(JSR356AsyncSupport.java:43)
... 33 more
ao¹t 12, 2015 8:33:08 PM com.vaadin.server.VaadinServletService ensurePushAvailable
AVERTISSEMENT:
=================================================================
Atmosphere could not be loaded. When using push with Vaadin, the
Atmosphere framework must be present on the classpath.
If using a dependency management system, please add a dependency
to vaadin-push.
If managing dependencies manually, please make sure Atmosphere
2.1.2.vaadin6 is included on the classpath.
Will fall back to using PushMode.DISABLED.
=================================================================
我尝试将javax.websocket-api-1.1.jar添加到库但没有任何改变，仍然是同样的错误。
我不知道问题出在哪里，也许我需要添加别的东西，但此刻我不知道是什么。
编辑：
我不使用Maven / Gradle，因为tomcat8嵌入式我下载了on tomcat8 website所需的一切，而对于测试应用程序的战争，我使用了我的一个项目，与Tomcat8非嵌入式工作正常。
答案 0 :(得分：1)
我认为这个问题是由classpath中包含的任何Jetty库引起的。它们可以在任何其他Java jar中 - 因此您应该通过某种工具（甚至IDE集成）分析应用程序的所有依赖项。
我的怀疑也基于Vaadin Configuration tutorial。请看那里 - 特别是Tomcat 8 section。
编辑：启用Vaadin Push时，请同时查看官方wiki。描述了应该在项目中进行的所有更改（依赖项，UI注释，web.xml）。