getWriter() has already been called for this response的解决方法
来源：互联网 发布：怎么投诉阿里云 编辑：程序博客网 时间：2024/06/05 07:38
今天在使用DeferredResult 做异步返回的时候一直报getWriter() has already been called for this response错误，网上有的说法是web容器生成的servlet代码中有out.write(""),这个和JSP中调用的 response.getOutputStream()产生冲突，但是笔者使用的是封装的类没有办法像他们说的out.flush()一下即可，刚刚替换了tomcat的版本，之前用的是apache-tomcat-7.0.61和更低的tomcat7.x的版本，更换成apache-tomcat-7.0.9问题解决。
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