I've written a NonBlocking ReadWrite test (testDelayedNBReadWrite, in the
attached file). I'm not sure if it is a valid test case (though works on
8.5.73, fails on 8.5.75). If it is valid, i can make a PR if needed.
On 2022/02/24 10:42:29 Rémy Maucherat wrote:
> On Thu, Feb 24, 2022 at 10:31 AM Istvan SZEKELY
> wrote:
> >
> > Hello!
> >
> > I have an application where a ReadListener and a WriteListener (call it
> > MyWriteListener) set to the ServletInputStream and the
ServletOutputStream
> > objects. Updating the Tomcat container from 8.5.73 to 8.5.75, the follow
> > error occured. The ServletOutputStream objects's isReady function always
> > returns false (within MyWriteListener.onWritePossible).
> >
> > I think its because of this commit:
> >
https://github.com/apache/tomcat/commit/2bfbbef65d1b1b07da46c8dcd6cee96cb5567998#diff-1ffbc1c154370a6c5385c168a0846a1c385aacbf5f880feb74cb1c27baa76003
> >
> > The ReadListener is set first, where dispatch fired
> > (action(ActionCode.DISPATCH_EXECUTE, null);). There the request threadId
> > updated (req.setRequestThread();).
> > Then when i'm setting the WriteListener (within the same thread), the
> > DISPACTH_EXECUTE action not fired (due to threadId equals request
objects
> > thread id). Thus registeredForWrite flag remains is true state, causing
> > the isReady false behaviour.
> >
> > Is this a Tomcat bug, or I should do something differently. I could't
set
> > WriteListener within a different thread, but it feels weird. Should i do
> > something else?
>
> I think I see the problem, but would you have test code or example
> like this testcase to submit ?
>
https://github.com/apache/tomcat/blob/main/test/org/apache/catalina/nonblocking/TestNonBlockingAPI.java#L951
> It would allow verifying and validating a fix.
>
> Rémy
>
> > Thank You in Advance,
> > Istvan
>
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package org.apache.catalina.nonblocking;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.lang.reflect.Field;
import java.net.HttpURLConnection;
import java.net.Socket;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import javax.net.SocketFactory;
import javax.servlet.AsyncContext;
import javax.servlet.AsyncEvent;
import javax.servlet.AsyncListener;
import javax.servlet.DispatcherType;
import javax.servlet.ReadListener;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.WriteListener;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.junit.Assert;
import org.junit.Test;
import org.apache.catalina.Context;
import org.apache.catalina.Wrapper;
import org.apache.catalina.core.AsyncContextImpl;
import org.apache.catalina.startup.BytesStreamer;
import org.apache.catalina.startup.SimpleHttpClient;
import org.apache.catalina.startup.TesterServlet;
import org.apache.catalina.startup.Tomcat;
import org.apache.catalina.startup.TomcatBaseTest;
import org.apache.catalina.valves.TesterAccessLogValve;
import org.apache.coyote.Request;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.buf.ByteChunk;
public class TestNonBlockingAPI extends TomcatBaseTest {
private static final Log log = LogFactory.getLog(Test
