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当请求失败时，我只是试图将错误发送回客户端。这是我的代码的样子：

response.sendError(HttpServletResponse.SC_BAD_REQUEST, 
        "Email and username are required fields.");

此代码引发以下错误：

java.lang.IllegalStateException: null
    at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:407) ~[catalina-6.0.26.jar:6.0.26]
    at com.****.****.****.*********Servlet.service(********Servlet.java:68) ~[********Servlet.class:na]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) ~[javaee-api-5.1.2.jar:5.1.2]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) ~[catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[catalina-6.0.26.jar:6.0.26]
    at org.red5.logging.LoggerContextFilter.doFilter(LoggerContextFilter.java:78) ~[red5.jar:na]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) ~[catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) ~[catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) [catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:465) [catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) [catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555) [catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [catalina-6.0.26.jar:6.0.26]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) [catalina-6.0.26.jar:6.0.26]
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852) [tomcat-coyote-6.0.26.jar:6.0.26]
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) [tomcat-coyote-6.0.26.jar:6.0.26]
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) [tomcat-coyote-6.0.26.jar:6.0.26]

为什么会被扔在这里？在这个调用之前我没有做任何与响应对象有任何关系的事情，我什至没有接触它，直到这个错误在 if 子句中发送。为什么我会收到此错误？

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2 回答 2

2

HttpServletResponse（由 ResponseFacade 实现）抛出 IllegalStateException 的唯一原因是响应之前已经提交。之前肯定有人摸过。

于 2012-06-26T20:52:27.007 回答
0

如果您的 ResponseFacade 没有覆盖response.sendError() 或导致转发到错误页面，则它正在发生，因为响应在转发到错误页面之前已提交。

为了解决这个问题，

  • 确保您没有刷新响应
  • 如果由于达到最大缓冲区大小而自动提交响应，请尝试增加缓冲区大小。
于 2012-06-27T05:12:32.670 回答