我有一个带有EJB模块和WAR模块的企业应用程序。在EJB模块中，我有一个用于执行基本启动/关闭过程（套接字连接等）的单例：
@Singleton
@Startup
public class ExecutionBean {
@EJB
private TServerLocal tServer;
@PostConstruct
private void atStartup() {
this.startup();
}
@PreDestroy
private void atShutdown() {
this.shutdown();
}
public void startup() {
[...]
}
public void shutdown() {
[...]
}
}
在WAR模块中，我可以使用一组servlet来关闭，启动和重启应用程序，只需调用ExecutionBean的shutdown和startup方法，如下所示：
public class shutdown extends HttpServlet {
@EJB
private ExecutionBean execBean;
protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet shutdown</title>");
out.println("</head>");
out.println("<body>");
execBean.shutdown();
out.println("shutdown done");
out.println("</body>");
out.println("</html>");
}
}
[...]
}
有时，经过一些部署周期（使用热部署或取消部署和部署，无关紧要），glassfish开始将我的servlet标记为不可用，并出现此类错误：
[2016-02-16T02:29:30.201-0300] [glassfish 4.0] [WARNING] [] [javax.enterprise.web] [tid: _ThreadID=22 _ThreadName=http-listener-1(3)] [timeMillis: 1455600570201] [levelValue: 900] [[
StandardWrapperValve[shutdown]: Allocate exception for servlet shutdown
java.lang.IllegalArgumentException: Can not set com.tecytal.tyterisk.ExecutionBean field com.tecytal.tyterisk.servlets.shutdown.execBean to com.tecytal.tyterisk.servlets.shutdown
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58)
at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:75)
at java.lang.reflect.Field.set(Field.java:764)
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:665)
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.inject(InjectionManagerImpl.java:484)
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectInstance(InjectionManagerImpl.java:141)
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectInstance(InjectionManagerImpl.java:127)
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.createManagedObject(InjectionManagerImpl.java:324)
at com.sun.enterprise.web.WebContainer.createServletInstance(WebContainer.java:983)
at com.sun.enterprise.web.WebModule.createServletInstance(WebModule.java:2130)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1404)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:1211)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:237)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:745)
如果我重新开始使用glassfish，那么就能正常工作。 这个错误对我来说没有意义，execBean不是一个字段，我不是设置任何东西，只调用一个方法。我做了一些非法的事情，所以在一些执行玻璃鱼疯了之后调用reflect.Field.set，或者这是一个知道错误？我的代码中有什么“奇怪的”证明这种行为吗？ 我在论坛等搜索过，但我什么都没找到。