https://bz.apache.org/bugzilla/show_bug.cgi?id=58505
--- Comment #2 from ArLi Weng <arliw...@gmail.com> ---
(In reply to ArLi Weng from comment #1)
> this's p.java:
>
> package j2eetest;
>
> import java.io.IOException;
> import java.io.PrintWriter;
> import javax.servlet.ServletException;
> import javax.servlet.annotation.WebServlet;
> import javax.servlet.http.HttpServlet;
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpServletResponse;
>
> @WebServlet(name = "p", urlPatterns = {"/p"})
> public class p extends HttpServlet {
>
> @Override
> protected void doGet(HttpServletRequest req, HttpServletResponse resp)
> throws ServletException, IOException {
> this.doPost(req, resp);
> }
>
> @Override
> protected void doPost(HttpServletRequest req, HttpServletResponse resp)
> throws ServletException, IOException {
> resp.setContentType("text/plain");
> // InputStream in = req.getInputStream();
> // byte[] bs = StreamReader.readAllBytes(in, false);
> // resp.getWriter().write(String.valueOf(bs.length));
> // resp.getWriter().write('\n');
> // resp.getWriter().write(new String(bs)); // here is work fine
>
> resp.getWriter().write('\n');
> try {
> resp.getWriter().write(req.getParameter("_mn")); //here i got
> null
> resp.getWriter().write('\n');
>
> resp.getWriter().write(String.valueOf(req.getParameterMap().size()));
> } catch (Exception e) {
> e.printStackTrace(new PrintWriter(resp.getWriter()));
> }
> }
> }
>
> this's 8.0.28(last test version) response:
>
> java.lang.NullPointerException
> at
> org.apache.catalina.connector.CoyoteWriter.write(CoyoteWriter.java:180)
> at j2eetest.p.doPost(p.java:30)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
> at
> org.apache.catalina.core.ApplicationFilterChain.
> internalDoFilter(ApplicationFilterChain.java:291)
> at
> org.apache.catalina.core.ApplicationFilterChain.
> doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
> at
> org.apache.catalina.core.ApplicationFilterChain.
> internalDoFilter(ApplicationFilterChain.java:239)
> at
> org.apache.catalina.core.ApplicationFilterChain.
> doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.
> java:217)
> 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$AbstractConnectionHandler.
> process(AbstractProtocol.java:673)
> at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.
> java:1500)
> at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:
> 1456)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
> 1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:
> 617)
> at
> org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.
> java:61)
> at java.lang.Thread.run(Thread.java:745)
btw: i have post that data: _mn=a
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