Servlet的“响应已经承诺”的原因 [英] Cause of Servlet's 'Response Already Committed'

问题描述

解决方案

响应已被提交，因为以下原因：

• 因为响应缓冲区已达到最大缓冲区大小。可能是因为以下原因：

   > JSP页面中的bufferSize已达到。您可以在page指令中增加JSP缓冲区大小
  。看到这里，
   
  <％@ page buffer =5kbautoFlush =false％> 
   
  >服务器默认响应最大缓冲区大小已达到。您可以增加
  服务器默认的最大缓冲区大小。 
   
   ServletRespnse.setBufferSize（）
    




• 部分代码已经调用了响应，我e，调用方法 HttpServletResponse.flushBuffer（）。




• 某些部分的代码已经刷新了 OutputStream 或 Writer ，i，e调用方法 HttpServletResponse.getOutputStream（）。flush（）或`HttpServletResponse.getWriter（）。flush（）




• 转发到另一个页面，其中响应被提交和关闭。例如，当response.sendRedirect（）被调用时，响应被提交。

What are the common possibilities to encounter this exception in servlet - Response Already committed?

解决方案

The response gets committed because of the following reasons:

• Because the Response buffer has reached the max buffer size. It could be because of the following reasons:

    > the bufferSize in JSP page has reached.You can increase the JSP buffer size 
      in page directive. See here, 
  
     <%@ page buffer="5kb" autoFlush="false" %>
  
    > the server default response max buffer size has reached.You can increase    
      the server default max buffer size.
  
      ServletRespnse.setBufferSize()
  

• Some part of the code has called flushed on the response , i,e, invoked the method HttpServletResponse.flushBuffer().

• Some part of the code has flushed the OutputStream or Writer, i,e, invoked the method HttpServletResponse.getOutputStream().flush() or `HttpServletResponse.getWriter().flush()

• If you have forwarded to another page, where the response is both committed and closed. For example, when response.sendRedirect() has been called, the response is committed.

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