Merge remote-tracking branch 'origin/jetty-10.0.x' into jetty-10.0.x-4572-message-indent

VERSION.txt

@@ -1,5 +1,7 @@
 jetty-10.0.0-SNAPSHOT
 
+jetty-10.0.0.beta0 - 27 May 2020
+
 jetty-9.4.30.v20200611 - 11 June 2020
  + 4776 Incorrect path matching for WebSocket using PathMappings
  + 4826 Upgrade to Apache Jasper 8.5.54
@@ -66,7 +68,7 @@ jetty-10.0.0.alpha1 - 26 November 2019
  + 2709 current default for headerCacheSize is not large enough for many
    requests
  + 2815 hpack fields are opaque octets
- + 3040 Allow RFC6265 Cookies to include optional SameSite attribute.
+ + 3040 Allow RFC6265 Cookies to include optional SameSite attribute
  + 3083 The ini-template for jetty.console-capture.dir does not match the
    default value
  + 3106 Websocket connection stats and request stats
@@ -499,10 +501,10 @@ jetty-9.4.25.v20191220 - 20 December 2019
    SslContextFactory usage
  + 4392 Suppress logging of QuietException in HttpChannelState.asyncError()
  + 4402 NPE in JettyRunWarExplodedMojo
- + 4411 Jetty server spins on incomplete request due to delayed dispatch
-   until content
- + 4415 GzipHandler invalid input zip size on large
-   (over 2,147,483,647 bytes) request body content
+ + 4411 Jetty server spins on incomplete request due to delayed dispatch until
+   content
+ + 4415 GzipHandler invalid input zip size on large (over 2,147,483,647 bytes)
+   request body content
  + 4421 HttpClient support for PROXY protocol
  + 4427 Retried HttpClient Requests can result in duplicates cookies
 

apache-jsp/src/main/config/modules/apache-jsp.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables use of the apache implementation of JSP

apache-jstl/src/main/config/modules/apache-jstl.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables the apache version of JSTL

build-resources/src/main/resources/jetty-checkstyle.xml

@@ -135,7 +135,7 @@
     <!-- ensure we don't have legacy comments that confuse javadoc tooling -->
     <module name="Regexp">
       <property name="id" value="LegacyMethodSeparators"/>
-      <property name="format" value="/\*\s*[=*-]*\s*\*/"/>
+      <property name="format" value="/\*\s*[=*-]+\s*\*/" />
       <property name="illegalPattern" value="true"/>
       <property name="ignoreComments" value="false"/>
       <property name="message" value="Legacy Method Separators"/>

jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn-impl/alpn-11.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Provides support for ALPN based on JDK 9+ APIs.

jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn-impl/alpn-12.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [depend]
 alpn-impl/alpn-11

jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn-impl/alpn-13.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [depend]
 alpn-impl/alpn-11

jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn-impl/alpn-14.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [depend]
 alpn-impl/alpn-11

jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn-impl/alpn-15.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [depend]
 alpn-impl/alpn-11

jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables the ALPN (Application Layer Protocol Negotiation) TLS extension.

jetty-annotations/src/main/config/modules/annotations.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables Annotation scanning for deployed webapplications.

jetty-annotations/src/main/java/org/eclipse/jetty/annotations/AnnotationParser.java

@@ -941,7 +941,7 @@ public class AnnotationParser
      * @param name the class file name
      * @return whether the class file name is valid
      */
-    private boolean isValidClassFileName(String name)
+    public boolean isValidClassFileName(String name)
     {
         //no name cannot be valid
         if (name == null || name.length() == 0)
@@ -983,7 +983,7 @@ public class AnnotationParser
      * @param path the class file path
      * @return whether the class file path is valid
      */
-    private boolean isValidClassFilePath(String path)
+    public boolean isValidClassFilePath(String path)
     {
         //no path is not valid
         if (path == null || path.length() == 0)

jetty-annotations/src/test/java/org/eclipse/jetty/annotations/TestSecurityAnnotationConversions.java

@@ -54,23 +54,28 @@ public class TestSecurityAnnotationConversions
     {
     }
 
-    @ServletSecurity(value = @HttpConstraint(value = EmptyRoleSemantic.PERMIT, transportGuarantee = TransportGuarantee.CONFIDENTIAL, rolesAllowed = {
-        "tom", "dick", "harry"
-    }))
+    @ServletSecurity(value = @HttpConstraint(value = EmptyRoleSemantic.PERMIT, transportGuarantee = TransportGuarantee.CONFIDENTIAL, rolesAllowed =
+        {
+            "tom", "dick", "harry"
+        }))
     public static class RolesServlet extends HttpServlet
     {
     }
 
-    @ServletSecurity(value = @HttpConstraint(value = EmptyRoleSemantic.PERMIT, transportGuarantee = TransportGuarantee.CONFIDENTIAL, rolesAllowed = {
-        "tom", "dick", "harry"
-    }), httpMethodConstraints = {@HttpMethodConstraint(value = "GET")})
+    @ServletSecurity(value = @HttpConstraint(value = EmptyRoleSemantic.PERMIT, transportGuarantee = TransportGuarantee.CONFIDENTIAL, rolesAllowed =
+        {
+            "tom", "dick", "harry"
+        }), httpMethodConstraints = {@HttpMethodConstraint(value = "GET")})
     public static class Method1Servlet extends HttpServlet
     {
     }
 
-    @ServletSecurity(value = @HttpConstraint(value = EmptyRoleSemantic.PERMIT, transportGuarantee = TransportGuarantee.CONFIDENTIAL, rolesAllowed = {
-        "tom", "dick", "harry"
-    }), httpMethodConstraints = {@HttpMethodConstraint(value = "GET", transportGuarantee = TransportGuarantee.CONFIDENTIAL)})
+    @ServletSecurity(value = @HttpConstraint(value = EmptyRoleSemantic.PERMIT, transportGuarantee = TransportGuarantee.CONFIDENTIAL, rolesAllowed =
+        {
+            "tom", "dick", "harry"
+        }), httpMethodConstraints = {
+        @HttpMethodConstraint(value = "GET", transportGuarantee = TransportGuarantee.CONFIDENTIAL)
+    })
     public static class Method2Servlet extends HttpServlet
     {
     }

jetty-client/src/main/config/modules/client.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Adds the Jetty HTTP client to the server classpath.

jetty-client/src/main/java/org/eclipse/jetty/client/AbstractConnectionPool.java

@@ -92,10 +92,9 @@ public abstract class AbstractConnectionPool implements ConnectionPool, Dumpable
     public Connection acquire(boolean create)
     {
         Connection connection = activate();
-        if (connection == null)
+        if (connection == null && create)
         {
-            if (create)
-                tryCreate(destination.getQueuedRequestCount());
+            tryCreate(destination.getQueuedRequestCount());
             connection = activate();
         }
         return connection;

jetty-client/src/main/java/org/eclipse/jetty/client/HttpReceiver.java

@@ -199,6 +199,7 @@ public abstract class HttpReceiver
         if (updateResponseState(ResponseState.TRANSIENT, ResponseState.BEGIN))
             return true;
 
+        dispose();
         terminateResponse(exchange);
         return false;
     }
@@ -217,23 +218,17 @@ public abstract class HttpReceiver
      */
     protected boolean responseHeader(HttpExchange exchange, HttpField field)
     {
-        out:
         while (true)
         {
             ResponseState current = responseState.get();
-            switch (current)
+            if (current == ResponseState.BEGIN || current == ResponseState.HEADER)
             {
-                case BEGIN:
-                case HEADER:
-                {
-                    if (updateResponseState(current, ResponseState.TRANSIENT))
-                        break out;
+                if (updateResponseState(current, ResponseState.TRANSIENT))
                     break;
-                }
-                default:
-                {
-                    return false;
-                }
+            }
+            else
+            {
+                return false;
             }
         }
 
@@ -267,6 +262,7 @@ public abstract class HttpReceiver
         if (updateResponseState(ResponseState.TRANSIENT, ResponseState.HEADER))
             return true;
 
+        dispose();
         terminateResponse(exchange);
         return false;
     }
@@ -334,7 +330,7 @@ public abstract class HttpReceiver
                     {
                         if (factory.getEncoding().equalsIgnoreCase(encoding))
                         {
-                            decoder = new Decoder(response, factory.newContentDecoder());
+                            decoder = new Decoder(exchange, factory.newContentDecoder());
                             break;
                         }
                     }
@@ -350,6 +346,7 @@ public abstract class HttpReceiver
             return hasDemand;
         }
 
+        dispose();
         terminateResponse(exchange);
         return false;
     }
@@ -393,39 +390,28 @@ public abstract class HttpReceiver
         {
             if (LOG.isDebugEnabled())
                 LOG.debug("Response content {}{}{}", response, System.lineSeparator(), BufferUtil.toDetailString(buffer));
-
-            ContentListeners listeners = this.contentListeners;
-            if (listeners != null)
+            if (contentListeners.isEmpty())
             {
-                if (listeners.isEmpty())
-                {
-                    callback.succeeded();
-                }
-                else
-                {
-                    Decoder decoder = this.decoder;
-                    if (decoder == null)
-                    {
-                        listeners.notifyContent(response, buffer, callback);
-                    }
-                    else
-                    {
-                        try
-                        {
-                            proceed = decoder.decode(buffer, callback);
-                        }
-                        catch (Throwable x)
-                        {
-                            callback.failed(x);
-                            proceed = false;
-                        }
-                    }
-                }
+                callback.succeeded();
             }
             else
             {
-                // May happen in case of concurrent abort.
-                proceed = false;
+                if (decoder == null)
+                {
+                    contentListeners.notifyContent(response, buffer, callback);
+                }
+                else
+                {
+                    try
+                    {
+                        proceed = decoder.decode(buffer, callback);
+                    }
+                    catch (Throwable x)
+                    {
+                        callback.failed(x);
+                        proceed = false;
+                    }
+                }
             }
         }
 
@@ -444,6 +430,7 @@ public abstract class HttpReceiver
             }
         }
 
+        dispose();
         terminateResponse(exchange);
         return false;
     }
@@ -567,6 +554,7 @@ public abstract class HttpReceiver
      */
     protected void dispose()
     {
+        assert responseState.get() != ResponseState.TRANSIENT;
         cleanup();
     }
 
@@ -598,7 +586,8 @@ public abstract class HttpReceiver
 
         this.failure = failure;
 
-        dispose();
+        if (terminate)
+            dispose();
 
         HttpResponse response = exchange.getResponse();
         if (LOG.isDebugEnabled())
@@ -776,14 +765,14 @@ public abstract class HttpReceiver
      */
     private class Decoder implements Destroyable
     {
-        private final HttpResponse response;
+        private final HttpExchange exchange;
         private final ContentDecoder decoder;
         private ByteBuffer encoded;
         private Callback callback;
 
-        private Decoder(HttpResponse response, ContentDecoder decoder)
+        private Decoder(HttpExchange exchange, ContentDecoder decoder)
         {
-            this.response = response;
+            this.exchange = exchange;
             this.decoder = Objects.requireNonNull(decoder);
         }
 
@@ -814,13 +803,13 @@ public abstract class HttpReceiver
                 }
                 ByteBuffer decoded = buffer;
                 if (LOG.isDebugEnabled())
-                    LOG.debug("Response content decoded ({}) {}{}{}", decoder, response, System.lineSeparator(), BufferUtil.toDetailString(decoded));
+                    LOG.debug("Response content decoded ({}) {}{}{}", decoder, exchange, System.lineSeparator(), BufferUtil.toDetailString(decoded));
 
-                contentListeners.notifyContent(response, decoded, Callback.from(() -> decoder.release(decoded), callback::failed));
+                contentListeners.notifyContent(exchange.getResponse(), decoded, Callback.from(() -> decoder.release(decoded), callback::failed));
 
                 boolean hasDemand = hasDemandOrStall();
                 if (LOG.isDebugEnabled())
-                    LOG.debug("Response content decoded {}, hasDemand={}", response, hasDemand);
+                    LOG.debug("Response content decoded {}, hasDemand={}", exchange, hasDemand);
                 if (!hasDemand)
                     return false;
             }
@@ -829,9 +818,50 @@ public abstract class HttpReceiver
         private void resume()
         {
             if (LOG.isDebugEnabled())
-                LOG.debug("Response content resuming decoding {}", response);
-            if (decode())
+                LOG.debug("Response content resuming decoding {}", exchange);
+
+            // The content and callback may be null
+            // if there is no initial content demand.
+            if (callback == null)
+            {
                 receive();
+                return;
+            }
+
+            while (true)
+            {
+                ResponseState current = responseState.get();
+                if (current == ResponseState.HEADERS || current == ResponseState.CONTENT)
+                {
+                    if (updateResponseState(current, ResponseState.TRANSIENT))
+                        break;
+                }
+                else
+                {
+                    callback.failed(new IllegalStateException("Invalid response state " + current));
+                    return;
+                }
+            }
+
+            boolean decoded = false;
+            try
+            {
+                decoded = decode();
+            }
+            catch (Throwable x)
+            {
+                callback.failed(x);
+            }
+
+            if (updateResponseState(ResponseState.TRANSIENT, ResponseState.CONTENT))
+            {
+                if (decoded)
+                    receive();
+                return;
+            }
+
+            dispose();
+            terminateResponse(exchange);
         }
 
         @Override

jetty-client/src/main/java/org/eclipse/jetty/client/HttpRequest.java

@@ -372,7 +372,7 @@ public class HttpRequest implements Request
     }
 
     @Override
-    public HttpFields.Mutable getHeaders()
+    public HttpFields getHeaders()
     {
         return headers;
     }

jetty-client/src/main/java/org/eclipse/jetty/client/MultiplexConnectionPool.java

@@ -56,7 +56,7 @@ public class MultiplexConnectionPool extends AbstractConnectionPool implements C
     public Connection acquire(boolean create)
     {
         Connection connection = activate();
-        if (connection == null)
+        if (connection == null && create)
         {
             int queuedRequests = getHttpDestination().getQueuedRequestCount();
             int maxMultiplex = getMaxMultiplex();

jetty-client/src/main/java/org/eclipse/jetty/client/http/HttpReceiverOverHTTP.java

@@ -100,7 +100,6 @@ public class HttpReceiverOverHTTP extends HttpReceiver implements HttpParser.Res
         RetainableByteBuffer currentBuffer = networkBuffer;
         if (currentBuffer == null)
             throw new IllegalStateException();
-
         if (currentBuffer.hasRemaining())
             throw new IllegalStateException();
 
@@ -121,9 +120,7 @@ public class HttpReceiverOverHTTP extends HttpReceiver implements HttpParser.Res
     private void releaseNetworkBuffer()
     {
         if (networkBuffer == null)
-            throw new IllegalStateException();
-        if (networkBuffer.hasRemaining())
-            throw new IllegalStateException();
+            return;
         networkBuffer.release();
         if (LOG.isDebugEnabled())
             LOG.debug("Released {}", networkBuffer);
@@ -153,24 +150,27 @@ public class HttpReceiverOverHTTP extends HttpReceiver implements HttpParser.Res
             while (true)
             {
                 // Always parse even empty buffers to advance the parser.
-                boolean stopProcessing = parse();
+                if (parse())
+                {
+                    // Return immediately, as this thread may be in a race
+                    // with e.g. another thread demanding more content.
+                    return;
+                }
 
                 // Connection may be closed or upgraded in a parser callback.
                 boolean upgraded = connection != endPoint.getConnection();
                 if (connection.isClosed() || upgraded)
                 {
                     if (LOG.isDebugEnabled())
-                        LOG.debug("{} {}", connection, upgraded ? "upgraded" : "closed");
+                        LOG.debug("{} {}", upgraded ? "Upgraded" : "Closed", connection);
                     releaseNetworkBuffer();
                     return;
                 }
 
-                if (stopProcessing)
-                    return;
-
                 if (networkBuffer.getReferences() > 1)
                     reacquireNetworkBuffer();
 
+                // The networkBuffer may have been reacquired.
                 int read = endPoint.fill(networkBuffer.getBuffer());
                 if (LOG.isDebugEnabled())
                     LOG.debug("Read {} bytes in {} from {}", read, networkBuffer, endPoint);
@@ -196,8 +196,7 @@ public class HttpReceiverOverHTTP extends HttpReceiver implements HttpParser.Res
         catch (Throwable x)
         {
             if (LOG.isDebugEnabled())
-                LOG.debug("Unable to fill from endpoint {}", endPoint, x);
-            networkBuffer.clear();
+                LOG.debug("Error processing {}", endPoint, x);
             releaseNetworkBuffer();
             failAndClose(x);
         }
@@ -213,14 +212,24 @@ public class HttpReceiverOverHTTP extends HttpReceiver implements HttpParser.Res
         while (true)
         {
             boolean handle = parser.parseNext(networkBuffer.getBuffer());
+            boolean failed = isFailed();
+            if (LOG.isDebugEnabled())
+                LOG.debug("Parse result={}, failed={}", handle, failed);
+            // When failed, it's safe to close the parser because there
+            // will be no races with other threads demanding more content.
+            if (failed)
+                parser.close();
+            if (handle)
+                return !failed;
+
             boolean complete = this.complete;
             this.complete = false;
             if (LOG.isDebugEnabled())
-                LOG.debug("Parsed {}, remaining {} {}", handle, networkBuffer.remaining(), parser);
-            if (handle)
-                return true;
+                LOG.debug("Parse complete={}, remaining {} {}", complete, networkBuffer.remaining(), parser);
+
             if (networkBuffer.isEmpty())
                 return false;
+
             if (complete)
             {
                 if (LOG.isDebugEnabled())
@@ -301,8 +310,13 @@ public class HttpReceiverOverHTTP extends HttpReceiver implements HttpParser.Res
         if (exchange == null)
             return false;
 
+        RetainableByteBuffer networkBuffer = this.networkBuffer;
         networkBuffer.retain();
-        return !responseContent(exchange, buffer, Callback.from(networkBuffer::release, this::failAndClose));
+        return !responseContent(exchange, buffer, Callback.from(networkBuffer::release, failure ->
+        {
+            networkBuffer.release();
+            failAndClose(failure);
+        }));
     }
 
     @Override
@@ -333,17 +347,7 @@ public class HttpReceiverOverHTTP extends HttpReceiver implements HttpParser.Res
         if (status != HttpStatus.CONTINUE_100)
             complete = true;
 
-        boolean proceed = responseSuccess(exchange);
-        if (!proceed)
-            return true;
-
-        if (status == HttpStatus.SWITCHING_PROTOCOLS_101)
-            return true;
-
-        if (HttpMethod.CONNECT.is(exchange.getRequest().getMethod()) && status == HttpStatus.OK_200)
-            return true;
-
-        return false;
+        return !responseSuccess(exchange);
     }
 
     @Override
@@ -376,13 +380,6 @@ public class HttpReceiverOverHTTP extends HttpReceiver implements HttpParser.Res
         parser.reset();
     }
 
-    @Override
-    protected void dispose()
-    {
-        super.dispose();
-        parser.close();
-    }
-
     private void failAndClose(Throwable failure)
     {
         if (responseFailure(failure))

jetty-client/src/test/java/org/eclipse/jetty/client/AbstractHttpClientServerTest.java

@@ -20,6 +20,7 @@ package org.eclipse.jetty.client;
 
 import java.nio.file.Path;
 import java.util.function.Consumer;
+import java.util.function.Function;
 import java.util.stream.Stream;
 
 import org.eclipse.jetty.client.http.HttpClientTransportOverHTTP;
@@ -45,13 +46,13 @@ public abstract class AbstractHttpClientServerTest
     protected HttpClient client;
     protected ServerConnector connector;
 
-    public void start(final Scenario scenario, Handler handler) throws Exception
+    public void start(Scenario scenario, Handler handler) throws Exception
     {
         startServer(scenario, handler);
         startClient(scenario);
     }
 
-    protected void startServer(final Scenario scenario, Handler handler) throws Exception
+    protected void startServer(Scenario scenario, Handler handler) throws Exception
     {
         if (server == null)
         {
@@ -66,23 +67,27 @@ public abstract class AbstractHttpClientServerTest
         server.start();
     }
 
-    protected void startClient(final Scenario scenario) throws Exception
+    protected void startClient(Scenario scenario) throws Exception
     {
         startClient(scenario, null);
     }
 
-    protected void startClient(final Scenario scenario, Consumer<HttpClient> config) throws Exception
+    protected void startClient(Scenario scenario, Consumer<HttpClient> config) throws Exception
+    {
+        startClient(scenario, HttpClientTransportOverHTTP::new, config);
+    }
+
+    protected void startClient(Scenario scenario, Function<ClientConnector, HttpClientTransportOverHTTP> transport, Consumer<HttpClient> config) throws Exception
     {
         ClientConnector clientConnector = new ClientConnector();
         clientConnector.setSelectors(1);
         clientConnector.setSslContextFactory(scenario.newClientSslContextFactory());
-        HttpClientTransport transport = new HttpClientTransportOverHTTP(clientConnector);
         QueuedThreadPool executor = new QueuedThreadPool();
         executor.setName("client");
         clientConnector.setExecutor(executor);
         Scheduler scheduler = new ScheduledExecutorScheduler("client-scheduler", false);
         clientConnector.setScheduler(scheduler);
-        client = newHttpClient(transport);
+        client = newHttpClient(transport.apply(clientConnector));
         client.setSocketAddressResolver(new SocketAddressResolver.Sync());
         if (config != null)
             config.accept(client);

jetty-client/src/test/java/org/eclipse/jetty/client/HttpClientAsyncContentTest.java

@@ -18,21 +18,30 @@
 
 package org.eclipse.jetty.client;
 
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.Map;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.LongConsumer;
+import java.util.zip.GZIPOutputStream;
+import javax.servlet.AsyncContext;
 import javax.servlet.ServletException;
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import org.eclipse.jetty.client.api.Response;
-import org.eclipse.jetty.client.api.Result;
+import org.eclipse.jetty.client.http.HttpChannelOverHTTP;
+import org.eclipse.jetty.client.http.HttpClientTransportOverHTTP;
+import org.eclipse.jetty.client.http.HttpConnectionOverHTTP;
+import org.eclipse.jetty.client.http.HttpReceiverOverHTTP;
+import org.eclipse.jetty.io.EndPoint;
 import org.eclipse.jetty.server.Request;
-import org.eclipse.jetty.server.handler.AbstractHandler;
 import org.eclipse.jetty.util.Callback;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ArgumentsSource;
@@ -46,10 +55,10 @@ public class HttpClientAsyncContentTest extends AbstractHttpClientServerTest
     @ArgumentsSource(ScenarioProvider.class)
     public void testSmallAsyncContent(Scenario scenario) throws Exception
     {
-        start(scenario, new AbstractHandler()
+        start(scenario, new EmptyServerHandler()
         {
             @Override
-            public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
+            protected void service(String target, Request jettyRequest, HttpServletRequest request, HttpServletResponse response) throws IOException
             {
                 ServletOutputStream output = response.getOutputStream();
                 output.write(65);
@@ -58,30 +67,19 @@ public class HttpClientAsyncContentTest extends AbstractHttpClientServerTest
             }
         });
 
-        final AtomicInteger contentCount = new AtomicInteger();
-        final AtomicReference<Callback> callbackRef = new AtomicReference<>();
-        final AtomicReference<CountDownLatch> contentLatch = new AtomicReference<>(new CountDownLatch(1));
-        final CountDownLatch completeLatch = new CountDownLatch(1);
+        AtomicInteger contentCount = new AtomicInteger();
+        AtomicReference<Callback> callbackRef = new AtomicReference<>();
+        AtomicReference<CountDownLatch> contentLatch = new AtomicReference<>(new CountDownLatch(1));
+        CountDownLatch completeLatch = new CountDownLatch(1);
         client.newRequest("localhost", connector.getLocalPort())
             .scheme(scenario.getScheme())
-            .onResponseContentAsync(new Response.AsyncContentListener()
+            .onResponseContentAsync((response, content, callback) ->
             {
-                @Override
-                public void onContent(Response response, ByteBuffer content, Callback callback)
-                {
-                    contentCount.incrementAndGet();
-                    callbackRef.set(callback);
-                    contentLatch.get().countDown();
-                }
+                contentCount.incrementAndGet();
+                callbackRef.set(callback);
+                contentLatch.get().countDown();
             })
-            .send(new Response.CompleteListener()
-            {
-                @Override
-                public void onComplete(Result result)
-                {
-                    completeLatch.countDown();
-                }
-            });
+            .send(result -> completeLatch.countDown());
 
         assertTrue(contentLatch.get().await(5, TimeUnit.SECONDS));
         Callback callback = callbackRef.get();
@@ -113,4 +111,294 @@ public class HttpClientAsyncContentTest extends AbstractHttpClientServerTest
         assertTrue(completeLatch.await(5, TimeUnit.SECONDS));
         assertEquals(2, contentCount.get());
     }
+
+    @ParameterizedTest
+    @ArgumentsSource(ScenarioProvider.class)
+    public void testConcurrentAsyncContent(Scenario scenario) throws Exception
+    {
+        AtomicReference<AsyncContext> asyncContextRef = new AtomicReference<>();
+        startServer(scenario, new EmptyServerHandler()
+        {
+            @Override
+            protected void service(String target, Request jettyRequest, HttpServletRequest request, HttpServletResponse response) throws IOException
+            {
+                ServletOutputStream output = response.getOutputStream();
+                output.write(new byte[1024]);
+                output.flush();
+                AsyncContext asyncContext = request.startAsync();
+                asyncContext.setTimeout(0);
+                asyncContextRef.set(asyncContext);
+            }
+        });
+        AtomicReference<LongConsumer> demandRef = new AtomicReference<>();
+        startClient(scenario, clientConnector -> new HttpClientTransportOverHTTP(clientConnector)
+        {
+            @Override
+            public org.eclipse.jetty.io.Connection newConnection(EndPoint endPoint, Map<String, Object> context) throws IOException
+            {
+                return customize(new HttpConnectionOverHTTP(endPoint, context)
+                {
+                    @Override
+                    protected HttpChannelOverHTTP newHttpChannel()
+                    {
+                        return new HttpChannelOverHTTP(this)
+                        {
+                            @Override
+                            protected HttpReceiverOverHTTP newHttpReceiver()
+                            {
+                                return new HttpReceiverOverHTTP(this)
+                                {
+                                    @Override
+                                    public boolean content(ByteBuffer buffer)
+                                    {
+                                        try
+                                        {
+                                            boolean result = super.content(buffer);
+                                            // The content has been notified, but the listener has not demanded.
+
+                                            // Simulate an asynchronous demand from otherThread.
+                                            // There is no further content, so otherThread will fill 0,
+                                            // set the fill interest, and release the network buffer.
+                                            CountDownLatch latch = new CountDownLatch(1);
+                                            Thread otherThread = new Thread(() ->
+                                            {
+                                                demandRef.get().accept(1);
+                                                latch.countDown();
+                                            });
+                                            otherThread.start();
+                                            // Wait for otherThread to finish, then let this thread continue.
+                                            assertTrue(latch.await(5, TimeUnit.SECONDS));
+
+                                            return result;
+                                        }
+                                        catch (InterruptedException x)
+                                        {
+                                            throw new RuntimeException(x);
+                                        }
+                                    }
+                                };
+                            }
+                        };
+                    }
+                }, context);
+            }
+        }, null);
+
+        CountDownLatch latch = new CountDownLatch(1);
+        client.newRequest("localhost", connector.getLocalPort())
+            .scheme(scenario.getScheme())
+            .onResponseContentDemanded((response, demand, content, callback) ->
+            {
+                demandRef.set(demand);
+                // Don't demand and don't succeed the callback.
+            })
+            .send(result ->
+            {
+                if (result.isSucceeded())
+                    latch.countDown();
+            });
+
+        // Wait for the threads to finish their processing.
+        Thread.sleep(1000);
+
+        // Complete the response.
+        asyncContextRef.get().complete();
+
+        assertTrue(latch.await(5, TimeUnit.SECONDS));
+    }
+
+    @ParameterizedTest
+    @ArgumentsSource(ScenarioProvider.class)
+    public void testAsyncContentAbort(Scenario scenario) throws Exception
+    {
+        start(scenario, new EmptyServerHandler()
+        {
+            @Override
+            protected void service(String target, Request jettyRequest, HttpServletRequest request, HttpServletResponse response) throws IOException
+            {
+                response.getOutputStream().write(new byte[1024]);
+            }
+        });
+
+        CountDownLatch latch = new CountDownLatch(1);
+        client.newRequest("localhost", connector.getLocalPort())
+            .scheme(scenario.getScheme())
+            .onResponseContentDemanded((response, demand, content, callback) -> response.abort(new Throwable()))
+            .send(result ->
+            {
+                if (result.isFailed())
+                    latch.countDown();
+            });
+
+        assertTrue(latch.await(5, TimeUnit.SECONDS));
+    }
+
+    @ParameterizedTest
+    @ArgumentsSource(ScenarioProvider.class)
+    public void testAsyncGzipContentAbortThenDemand(Scenario scenario) throws Exception
+    {
+        start(scenario, new EmptyServerHandler()
+        {
+            @Override
+            protected void service(String target, Request jettyRequest, HttpServletRequest request, HttpServletResponse response) throws IOException
+            {
+                response.setHeader("Content-Encoding", "gzip");
+                GZIPOutputStream gzip = new GZIPOutputStream(response.getOutputStream());
+                gzip.write(new byte[1024]);
+                gzip.finish();
+            }
+        });
+
+        CountDownLatch latch = new CountDownLatch(1);
+        client.newRequest("localhost", connector.getLocalPort())
+            .scheme(scenario.getScheme())
+            .onResponseContentDemanded((response, demand, content, callback) ->
+            {
+                response.abort(new Throwable());
+                demand.accept(1);
+            })
+            .send(result ->
+            {
+                if (result.isFailed())
+                    latch.countDown();
+            });
+
+        assertTrue(latch.await(5, TimeUnit.SECONDS));
+    }
+
+    @ParameterizedTest
+    @ArgumentsSource(ScenarioProvider.class)
+    public void testAsyncGzipContentDelayedDemand(Scenario scenario) throws Exception
+    {
+        start(scenario, new EmptyServerHandler()
+        {
+            @Override
+            protected void service(String target, Request jettyRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
+            {
+                response.setHeader("Content-Encoding", "gzip");
+                try (GZIPOutputStream gzip = new GZIPOutputStream(response.getOutputStream()))
+                {
+                    gzip.write(new byte[1024]);
+                }
+            }
+        });
+
+        AtomicReference<LongConsumer> demandRef = new AtomicReference<>();
+        CountDownLatch headersLatch = new CountDownLatch(1);
+        CountDownLatch resultLatch = new CountDownLatch(1);
+        client.newRequest("localhost", connector.getLocalPort())
+            .scheme(scenario.getScheme())
+            .onResponseContentDemanded(new Response.DemandedContentListener()
+            {
+                @Override
+                public void onBeforeContent(Response response, LongConsumer demand)
+                {
+                    // Don't demand yet.
+                    demandRef.set(demand);
+                    headersLatch.countDown();
+                }
+
+                @Override
+                public void onContent(Response response, LongConsumer demand, ByteBuffer content, Callback callback)
+                {
+                    demand.accept(1);
+                }
+            })
+            .send(result ->
+            {
+                if (result.isSucceeded())
+                    resultLatch.countDown();
+            });
+
+        assertTrue(headersLatch.await(5, TimeUnit.SECONDS));
+        // Wait to make sure the demand is really delayed.
+        Thread.sleep(500);
+        demandRef.get().accept(1);
+
+        assertTrue(resultLatch.await(5, TimeUnit.SECONDS));
+    }
+
+    @ParameterizedTest
+    @ArgumentsSource(ScenarioProvider.class)
+    public void testAsyncGzipContentAbortWhileDecodingWithDelayedDemand(Scenario scenario) throws Exception
+    {
+        // Use a large content so that the gzip decoding is done in multiple passes.
+        byte[] bytes = new byte[8 * 1024 * 1024];
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (GZIPOutputStream gzip = new GZIPOutputStream(baos))
+        {
+            gzip.write(bytes);
+        }
+        byte[] gzipBytes = baos.toByteArray();
+        int half = gzipBytes.length / 2;
+        byte[] gzip1 = Arrays.copyOfRange(gzipBytes, 0, half);
+        byte[] gzip2 = Arrays.copyOfRange(gzipBytes, half, gzipBytes.length);
+
+        AtomicReference<AsyncContext> asyncContextRef = new AtomicReference<>();
+        start(scenario, new EmptyServerHandler()
+        {
+            @Override
+            protected void service(String target, Request jettyRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
+            {
+                AsyncContext asyncContext = request.startAsync();
+                asyncContext.setTimeout(0);
+                asyncContextRef.set(asyncContext);
+
+                response.setHeader("Content-Encoding", "gzip");
+                ServletOutputStream output = response.getOutputStream();
+                output.write(gzip1);
+                output.flush();
+            }
+        });
+
+        AtomicReference<LongConsumer> demandRef = new AtomicReference<>();
+        CountDownLatch firstChunkLatch = new CountDownLatch(1);
+        CountDownLatch secondChunkLatch = new CountDownLatch(1);
+        CountDownLatch resultLatch = new CountDownLatch(1);
+        AtomicInteger chunks = new AtomicInteger();
+        client.newRequest("localhost", connector.getLocalPort())
+            .scheme(scenario.getScheme())
+            .onResponseContentDemanded((response, demand, content, callback) ->
+            {
+                if (chunks.incrementAndGet() == 1)
+                {
+                    try
+                    {
+                        // Don't demand, but make the server write the second chunk.
+                        AsyncContext asyncContext = asyncContextRef.get();
+                        asyncContext.getResponse().getOutputStream().write(gzip2);
+                        asyncContext.complete();
+                        demandRef.set(demand);
+                        firstChunkLatch.countDown();
+                    }
+                    catch (IOException x)
+                    {
+                        throw new RuntimeException(x);
+                    }
+                }
+                else
+                {
+                    response.abort(new Throwable());
+                    demandRef.set(demand);
+                    secondChunkLatch.countDown();
+                }
+            })
+            .send(result ->
+            {
+                if (result.isFailed())
+                    resultLatch.countDown();
+            });
+
+        assertTrue(firstChunkLatch.await(5, TimeUnit.SECONDS));
+        // Wait to make sure the demand is really delayed.
+        Thread.sleep(500);
+        demandRef.get().accept(1);
+
+        assertTrue(secondChunkLatch.await(5, TimeUnit.SECONDS));
+        // Wait to make sure the demand is really delayed.
+        Thread.sleep(500);
+        demandRef.get().accept(1);
+
+        assertTrue(resultLatch.await(555, TimeUnit.SECONDS));
+    }
 }

jetty-client/src/test/java/org/eclipse/jetty/client/HttpClientTest.java

@@ -1582,11 +1582,6 @@ public class HttpClientTest extends AbstractHttpClientServerTest
                 ContentResponse response = listener.get(5, TimeUnit.SECONDS);
                 assertEquals(200, response.getStatus());
 
-                // Because the tunnel was successful, this connection will be
-                // upgraded to an SslConnection, so it will not be fill interested.
-                // This test doesn't upgrade, so it needs to restore the fill interest.
-                ((AbstractConnection)connection).fillInterested();
-
                 // Test that I can send another request on the same connection.
                 request = client.newRequest(host, port);
                 listener = new FutureResponseListener(request);

jetty-deploy/src/main/config/modules/deploy.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables webapplication deployment from the webapps directory.

jetty-deploy/src/main/config/modules/global-webapp-common.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables Deployer to apply common configuration to all webapp deployments

jetty-documentation/src/main/asciidoc/distribution-guide/connectors/configuring-ssl.adoc

@@ -989,3 +989,15 @@ As a reminder, when configuring your includes/excludes, *excludes always win*.
 
 Dumps can be configured as part of the `jetty.xml` configuration for your server.
 Please see the documentation on the link:#jetty-dump-tool[Jetty Dump Tool] for more information.
+
+
+==== SslContextFactory KeyStore Reload
+
+Jetty can be configured to monitor the directory of the KeyStore file specified in the SslContextFactory, and reload the
+SslContextFactory if any changes are detected to the KeyStore file.
+
+If changes need to be done to other file such as the TrustStore file, this must be done before the change to the Keystore
+file which will then trigger the `SslContextFactory` reload.
+
+With the Jetty distribution this feature can be used by simply activating the `ssl-reload` startup module.
+For embedded usage the `KeyStoreScanner` should be created given the `SslContextFactory` and added as a bean on the Server.

jetty-fcgi/fcgi-server/src/main/config/modules/fcgi.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Adds the FastCGI implementation to the classpath.

jetty-fcgi/fcgi-server/src/main/java/org/eclipse/jetty/fcgi/server/proxy/TryFilesFilter.java

@@ -39,8 +39,8 @@ import org.eclipse.jetty.util.StringUtil;
 /**
  * Inspired by nginx's try_files functionality.
  * <p>
- * This filter accepts the <code>files</code> init-param as a list of space-separated
- * file URIs. The special token <code>$path</code> represents the current request URL's
+ * This filter accepts the {@code files} init-param as a list of space-separated
+ * file URIs. The special token {@code $path} represents the current request URL's
  * path (the portion after the context path).
  * <p>
  * Typical example of how this filter can be configured is the following:
@@ -50,14 +50,14 @@ import org.eclipse.jetty.util.StringUtil;
  *     &lt;filter-class&gt;org.eclipse.jetty.fcgi.server.proxy.TryFilesFilter&lt;/filter-class&gt;
  *     &lt;init-param&gt;
  *         &lt;param-name&gt;files&lt;/param-name&gt;
- *         &lt;param-value&gt;maintenance.html $path index.php?p=$path&lt;/param-value&gt;
+ *         &lt;param-value&gt;/maintenance.html $path /index.php?p=$path&lt;/param-value&gt;
  *     &lt;/init-param&gt;
  * &lt;/filter&gt;
  * </pre>
- * For a request such as <code>/context/path/to/resource.ext</code>, this filter will
- * try to serve the <code>/maintenance.html</code> file if it finds it; failing that,
- * it will try to serve the <code>/path/to/resource.ext</code> file if it finds it;
- * failing that it will forward the request to <code>index.php?p=/path/to/resource.ext</code>.
+ * For a request such as {@code /context/path/to/resource.ext}, this filter will
+ * try to serve the {@code /maintenance.html} file if it finds it; failing that,
+ * it will try to serve the {@code /path/to/resource.ext} file if it finds it;
+ * failing that it will forward the request to {@code /index.php?p=/path/to/resource.ext}.
  * The last file URI specified in the list is therefore the "fallback" to which the request
  * is forwarded to in case no previous files can be found.
  * <p>

jetty-fcgi/fcgi-server/src/test/java/org/eclipse/jetty/fcgi/server/AbstractHttpClientServerTest.java

@@ -93,6 +93,7 @@ public abstract class AbstractHttpClientServerTest
         {
             assertThat("Server BufferPool - leaked acquires", serverBufferPool.getLeakedAcquires(), Matchers.is(0L));
             assertThat("Server BufferPool - leaked releases", serverBufferPool.getLeakedReleases(), Matchers.is(0L));
+            assertThat("Server BufferPool - leaked removes", serverBufferPool.getLeakedRemoves(), Matchers.is(0L));
             assertThat("Server BufferPool - unreleased", serverBufferPool.getLeakedResources(), Matchers.is(0L));
         }
 
@@ -101,6 +102,7 @@ public abstract class AbstractHttpClientServerTest
             LeakTrackingByteBufferPool pool = (LeakTrackingByteBufferPool)clientBufferPool;
             assertThat("Client BufferPool - leaked acquires", pool.getLeakedAcquires(), Matchers.is(0L));
             assertThat("Client BufferPool - leaked releases", pool.getLeakedReleases(), Matchers.is(0L));
+            assertThat("Client BufferPool - leaked removes", pool.getLeakedRemoves(), Matchers.is(0L));
             assertThat("Client BufferPool - unreleased", pool.getLeakedResources(), Matchers.is(0L));
         }
 

jetty-gcloud/jetty-gcloud-session-manager/src/main/config-template/modules/gcloud-datastore.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables GCloud Datastore API and implementation

jetty-gcloud/jetty-gcloud-session-manager/src/main/config-template/modules/gcloud.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Control GCloud API classpath

jetty-gcloud/jetty-gcloud-session-manager/src/main/config-template/modules/session-store-gcloud.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables GCloudDatastore session management.

jetty-hazelcast/src/main/config/modules/session-store-hazelcast-embedded.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables session data store in an embedded Hazelcast Map

jetty-hazelcast/src/main/config/modules/session-store-hazelcast-remote.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables session data store in a remote Hazelcast Map

jetty-home/src/main/resources/modules/conscrypt.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Installs the Conscrypt JSSE provider

jetty-home/src/main/resources/modules/hawtio.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Deploys the Hawtio console as a webapplication.

jetty-home/src/main/resources/modules/jamon.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Deploys the JAMon webapplication

jetty-home/src/main/resources/modules/jminix.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Deploys the Jminix JMX Console within the server

jetty-home/src/main/resources/modules/jolokia.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Deploys the Jolokia console as a web application.

jetty-home/src/main/resources/modules/jsp.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables JSP for all webapplications deployed on the server.

jetty-home/src/main/resources/modules/jstl.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables JSTL for all webapplications deployed on the server

jetty-home/src/main/resources/modules/stop.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 This module causes jetty to stop immediately after starting. This is good for testing configuration and/or precompiling quickstart webapps

jetty-http/src/main/java/org/eclipse/jetty/http/HttpCookie.java

@@ -37,11 +37,11 @@ public class HttpCookie
     private static final String __01Jan1970_COOKIE = DateGenerator.formatCookieDate(0).trim();
 
     /**
-     *If this string is found within the comment parsed with {@link #isHttpOnlyInComment(String)} the check will return true
+     * If this string is found within the comment parsed with {@link #isHttpOnlyInComment(String)} the check will return true
      **/
     public static final String HTTP_ONLY_COMMENT = "__HTTP_ONLY__";
     /**
-     *These strings are used by {@link #getSameSiteFromComment(String)} to check for a SameSite specifier in the comment
+     * These strings are used by {@link #getSameSiteFromComment(String)} to check for a SameSite specifier in the comment
      **/
     private static final String SAME_SITE_COMMENT = "__SAME_SITE_";
     public static final String SAME_SITE_NONE_COMMENT = SAME_SITE_COMMENT + "NONE__";
@@ -474,10 +474,10 @@ public class HttpCookie
                 LOG.debug("No default value for SameSite");
             return null;
         }
-        
+
         if (o instanceof SameSite)
             return (SameSite)o;
-        
+
         try
         {
             SameSite samesite = Enum.valueOf(SameSite.class, o.toString().trim().toUpperCase(Locale.ENGLISH));

jetty-http2/http2-common/src/main/java/org/eclipse/jetty/http2/HTTP2Connection.java

@@ -101,8 +101,7 @@ public class HTTP2Connection extends AbstractConnection implements WriteFlusher.
     {
         if (LOG.isDebugEnabled())
             LOG.debug("HTTP2 onUpgradeTo {} {}", this, BufferUtil.toDetailString(buffer));
-        if (buffer != null)
-            producer.setInputBuffer(buffer);
+        producer.setInputBuffer(buffer);
     }
 
     public boolean isUseInputDirectByteBuffers()

jetty-http2/http2-common/src/main/java/org/eclipse/jetty/http2/HTTP2Flusher.java

@@ -436,7 +436,7 @@ public class HTTP2Flusher extends IteratingCallback implements Dumpable
             // It's an application frame; is the stream gone already?
             if (stream == null)
                 return true;
-            return stream.isReset();
+            return stream.isResetOrFailed();
         }
 
         private boolean isProtocolFrame(Frame frame)

jetty-http2/http2-common/src/main/java/org/eclipse/jetty/http2/HTTP2Session.java

@@ -239,7 +239,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     public void onData(final DataFrame frame, Callback callback)
     {
         if (LOG.isDebugEnabled())
-            LOG.debug("Received {}", frame);
+            LOG.debug("Received {} on {}", frame, this);
 
         int streamId = frame.getStreamId();
         IStream stream = getStream(streamId);
@@ -259,7 +259,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
         else
         {
             if (LOG.isDebugEnabled())
-                LOG.debug("Stream #{} not found", streamId);
+                LOG.debug("Stream #{} not found on {}", streamId, this);
             // We must enlarge the session flow control window,
             // otherwise other requests will be stalled.
             flowControl.onDataConsumed(this, null, flowControlLength);
@@ -297,14 +297,14 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     public void onPriority(PriorityFrame frame)
     {
         if (LOG.isDebugEnabled())
-            LOG.debug("Received {}", frame);
+            LOG.debug("Received {} on {}", frame, this);
     }
 
     @Override
     public void onReset(ResetFrame frame)
     {
         if (LOG.isDebugEnabled())
-            LOG.debug("Received {}", frame);
+            LOG.debug("Received {} on {}", frame, this);
 
         int streamId = frame.getStreamId();
         IStream stream = getStream(streamId);
@@ -336,7 +336,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     public void onSettings(SettingsFrame frame, boolean reply)
     {
         if (LOG.isDebugEnabled())
-            LOG.debug("Received {}", frame);
+            LOG.debug("Received {} on {}", frame, this);
 
         if (frame.isReply())
             return;
@@ -420,7 +420,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     public void onPing(PingFrame frame)
     {
         if (LOG.isDebugEnabled())
-            LOG.debug("Received {}", frame);
+            LOG.debug("Received {} on {}", frame, this);
 
         if (frame.isReply())
         {
@@ -454,7 +454,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     public void onGoAway(final GoAwayFrame frame)
     {
         if (LOG.isDebugEnabled())
-            LOG.debug("Received {}", frame);
+            LOG.debug("Received {} on {}", frame, this);
 
         if (closed.compareAndSet(CloseState.NOT_CLOSED, CloseState.REMOTELY_CLOSED))
         {
@@ -473,7 +473,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     public void onWindowUpdate(WindowUpdateFrame frame)
     {
         if (LOG.isDebugEnabled())
-            LOG.debug("Received {}", frame);
+            LOG.debug("Received {} on {}", frame, this);
 
         int streamId = frame.getStreamId();
         int windowDelta = frame.getWindowDelta();
@@ -528,7 +528,9 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     public void onStreamFailure(int streamId, int error, String reason)
     {
         Callback callback = new ResetCallback(streamId, error, Callback.NOOP);
-        Throwable failure = toFailure("Stream failure", error, reason);
+        Throwable failure = toFailure(error, reason);
+        if (LOG.isDebugEnabled())
+            LOG.debug("Stream #{} failure {}", streamId, this, failure);
         onStreamFailure(streamId, error, reason, failure, callback);
     }
 
@@ -549,12 +551,16 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
 
     protected void onConnectionFailure(int error, String reason, Callback callback)
     {
-        Throwable failure = toFailure("Session failure", error, reason);
+        Throwable failure = toFailure(error, reason);
+        if (LOG.isDebugEnabled())
+            LOG.debug("Session failure {}", this, failure);
         onFailure(error, reason, failure, new FailureCallback(error, reason, callback));
     }
 
     protected void abort(Throwable failure)
     {
+        if (LOG.isDebugEnabled())
+            LOG.debug("Session abort {}", this, failure);
         onFailure(ErrorCode.NO_ERROR.code, null, failure, new TerminateCallback(failure));
     }
 
@@ -574,7 +580,9 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     {
         int error = frame.getError();
         String reason = frame.tryConvertPayload();
-        Throwable failure = toFailure("Session close", error, reason);
+        Throwable failure = toFailure(error, reason);
+        if (LOG.isDebugEnabled())
+            LOG.debug("Session close {}", this, failure);
         Collection<Stream> streams = getStreams();
         int count = streams.size();
         Callback countCallback = new CountingCallback(callback, count + 1);
@@ -585,9 +593,9 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
         notifyClose(this, frame, countCallback);
     }
 
-    private Throwable toFailure(String message, int error, String reason)
+    private Throwable toFailure(int error, String reason)
     {
-        return new IOException(String.format("%s %s/%s", message, ErrorCode.toString(error, null), reason));
+        return new IOException(String.format("%s/%s", ErrorCode.toString(error, null), reason));
     }
 
     @Override
@@ -685,14 +693,14 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
         if (closed.compareAndSet(CloseState.NOT_CLOSED, CloseState.LOCALLY_CLOSED))
         {
             if (LOG.isDebugEnabled())
-                LOG.debug("Closing {}/{}", error, reason);
+                LOG.debug("Closing {}/{} {}", error, reason, this);
             closeFrame = newGoAwayFrame(CloseState.LOCALLY_CLOSED, error, reason);
             control(null, callback, closeFrame);
             return true;
         }
 
         if (LOG.isDebugEnabled())
-            LOG.debug("Ignoring close {}/{}, already closed", error, reason);
+            LOG.debug("Ignoring close {}/{}, already closed {}", error, reason, this);
         callback.succeeded();
         return false;
     }
@@ -777,7 +785,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
     private void frame(HTTP2Flusher.Entry entry, boolean flush)
     {
         if (LOG.isDebugEnabled())
-            LOG.debug("{} {}", flush ? "Sending" : "Queueing", entry.frame);
+            LOG.debug("{} {} on {}", flush ? "Sending" : "Queueing", entry.frame, this);
         // Ping frames are prepended to process them as soon as possible.
         boolean queued = entry.frame.getType() == FrameType.PING ? flusher.prepend(entry) : flusher.append(entry);
         if (queued && flush)
@@ -873,7 +881,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
             onStreamClosed(stream);
             flowControl.onStreamDestroyed(stream);
             if (LOG.isDebugEnabled())
-                LOG.debug("Removed {} {}", stream.isLocal() ? "local" : "remote", stream);
+                LOG.debug("Removed {} {} from {}", stream.isLocal() ? "local" : "remote", stream, this);
         }
     }
 
@@ -1143,7 +1151,7 @@ public abstract class HTTP2Session extends ContainerLifeCycle implements ISessio
         return lastRemoteStreamId.get();
     }
 
-    private void updateLastRemoteStreamId(int streamId)
+    protected void updateLastRemoteStreamId(int streamId)
     {
         Atomics.updateMax(lastRemoteStreamId, streamId);
     }

jetty-http2/http2-common/src/main/java/org/eclipse/jetty/http2/HTTP2Stream.java

@@ -42,6 +42,7 @@ import org.eclipse.jetty.http2.frames.HeadersFrame;
 import org.eclipse.jetty.http2.frames.PushPromiseFrame;
 import org.eclipse.jetty.http2.frames.ResetFrame;
 import org.eclipse.jetty.http2.frames.WindowUpdateFrame;
+import org.eclipse.jetty.io.EofException;
 import org.eclipse.jetty.io.IdleTimeout;
 import org.eclipse.jetty.util.Callback;
 import org.eclipse.jetty.util.MathUtils;
@@ -61,7 +62,6 @@ public class HTTP2Stream extends IdleTimeout implements IStream, Callback, Dumpa
     private final AtomicReference<Object> attachment = new AtomicReference<>();
     private final AtomicReference<ConcurrentMap<String, Object>> attributes = new AtomicReference<>();
     private final AtomicReference<CloseState> closeState = new AtomicReference<>(CloseState.NOT_CLOSED);
-    private final AtomicReference<Callback> writing = new AtomicReference<>();
     private final AtomicInteger sendWindow = new AtomicInteger();
     private final AtomicInteger recvWindow = new AtomicInteger();
     private final long timeStamp = System.nanoTime();
@@ -69,9 +69,11 @@ public class HTTP2Stream extends IdleTimeout implements IStream, Callback, Dumpa
     private final int streamId;
     private final MetaData.Request request;
     private final boolean local;
+    private Callback sendCallback;
+    private Throwable failure;
     private boolean localReset;
-    private Listener listener;
     private boolean remoteReset;
+    private Listener listener;
     private long dataLength;
     private long dataDemand;
     private boolean dataInitial;
@@ -141,17 +143,31 @@ public class HTTP2Stream extends IdleTimeout implements IStream, Callback, Dumpa
     @Override
     public void reset(ResetFrame frame, Callback callback)
     {
-        if (isReset())
-            return;
-        localReset = true;
+        synchronized (this)
+        {
+            if (isReset())
+                return;
+            localReset = true;
+            failure = new EOFException("reset");
+        }
         session.frames(this, callback, frame, Frame.EMPTY_ARRAY);
     }
 
     private boolean startWrite(Callback callback)
     {
-        if (writing.compareAndSet(null, callback))
-            return true;
-        callback.failed(new WritePendingException());
+        Throwable failure;
+        synchronized (this)
+        {
+            failure = this.failure;
+            if (failure == null && sendCallback == null)
+            {
+                sendCallback = callback;
+                return true;
+            }
+        }
+        if (failure == null)
+            failure = new WritePendingException();
+        callback.failed(failure);
         return false;
     }
 
@@ -176,7 +192,27 @@ public class HTTP2Stream extends IdleTimeout implements IStream, Callback, Dumpa
     @Override
     public boolean isReset()
     {
-        return localReset || remoteReset;
+        synchronized (this)
+        {
+            return localReset || remoteReset;
+        }
+    }
+
+    private boolean isFailed()
+    {
+        synchronized (this)
+        {
+            return failure != null;
+        }
+    }
+
+    @Override
+    public boolean isResetOrFailed()
+    {
+        synchronized (this)
+        {
+            return isReset() || isFailed();
+        }
     }
 
     @Override
@@ -440,7 +476,11 @@ public class HTTP2Stream extends IdleTimeout implements IStream, Callback, Dumpa
 
     private void onReset(ResetFrame frame, Callback callback)
     {
-        remoteReset = true;
+        synchronized (this)
+        {
+            remoteReset = true;
+            failure = new EofException("reset");
+        }
         close();
         session.removeStream(this);
         notifyReset(this, frame, callback);
@@ -461,8 +501,12 @@ public class HTTP2Stream extends IdleTimeout implements IStream, Callback, Dumpa
 
     private void onFailure(FailureFrame frame, Callback callback)
     {
-        // Don't close or remove the stream, as the listener may
-        // want to use it, for example to send a RST_STREAM frame.
+        synchronized (this)
+        {
+            failure = frame.getFailure();
+        }
+        close();
+        session.removeStream(this);
         notifyFailure(this, frame, callback);
     }
 
@@ -645,7 +689,12 @@ public class HTTP2Stream extends IdleTimeout implements IStream, Callback, Dumpa
 
     private Callback endWrite()
     {
-        return writing.getAndSet(null);
+        synchronized (this)
+        {
+            Callback callback = sendCallback;
+            sendCallback = null;
+            return callback;
+        }
     }
 
     private void notifyNewStream(Stream stream)

jetty-http2/http2-common/src/main/java/org/eclipse/jetty/http2/IStream.java

@@ -114,4 +114,11 @@ public interface IStream extends Stream, Closeable
      * @see #isClosed()
      */
     boolean isRemotelyClosed();
+
+    /**
+     * @return whether this stream has been reset (locally or remotely) or has been failed
+     * @see #isReset()
+     * @see Listener#onFailure(Stream, int, String, Throwable, Callback)
+     */
+    boolean isResetOrFailed();
 }

jetty-http2/http2-common/src/main/java/org/eclipse/jetty/http2/parser/Parser.java

@@ -149,7 +149,7 @@ public class Parser
             return false;
 
         if (LOG.isDebugEnabled())
-            LOG.debug("Parsed {} frame header from {}", headerParser, buffer);
+            LOG.debug("Parsed {} frame header from {}@{}", headerParser, buffer, Integer.toHexString(buffer.hashCode()));
 
         if (headerParser.getLength() > getMaxFrameLength())
             return connectionFailure(buffer, ErrorCode.FRAME_SIZE_ERROR, "invalid_frame_length");
@@ -199,7 +199,7 @@ public class Parser
                 return false;
         }
         if (LOG.isDebugEnabled())
-            LOG.debug("Parsed {} frame body from {}", FrameType.from(type), buffer);
+            LOG.debug("Parsed {} frame body from {}@{}", FrameType.from(type), buffer, Integer.toHexString(buffer.hashCode()));
         reset();
         return true;
     }

jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackEncoder.java

@@ -406,7 +406,9 @@ public class HpackEncoder
                     encodeName(buffer, (byte)0x00, 4, header.asString(), name);
                     encodeValue(buffer, true, field.getValue());
                     if (_debug)
-                        encoding = "LitIdxNS" + (1 + NBitInteger.octectsNeeded(4, _context.index(name))) + "HuffV!Idx";
+                        encoding = "Lit" +
+                            ((name == null) ? "HuffN" : "IdxNS" + (1 + NBitInteger.octectsNeeded(4, _context.index(name)))) +
+                            "HuffV!Idx";
                 }
                 else
                 {

jetty-http2/http2-http-client-transport/src/test/java/org/eclipse/jetty/http2/client/http/MaxConcurrentStreamsTest.java

@@ -175,6 +175,7 @@ public class MaxConcurrentStreamsTest extends AbstractTest
                     @Override
                     public void onSettings(Session session, SettingsFrame frame)
                     {
+                        super.onSettings(session, frame);
                         // Send another request to simulate a request being
                         // sent concurrently with connection establishment.
                         // Sending this request will trigger the creation of
@@ -199,7 +200,6 @@ public class MaxConcurrentStreamsTest extends AbstractTest
                                     }
                                 });
                         }
-                        super.onSettings(session, frame);
                     }
                 }, promise, context);
             }

jetty-http2/http2-server/src/main/config/modules/http2.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables HTTP2 protocol support on the TLS(SSL) Connector,

jetty-http2/http2-server/src/main/config/modules/http2c.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables the HTTP2C protocol on the HTTP Connector

jetty-http2/http2-server/src/main/java/org/eclipse/jetty/http2/server/HTTP2ServerSession.java

@@ -106,6 +106,7 @@ public class HTTP2ServerSession extends HTTP2Session implements ServerParser.Lis
                 {
                     if (isClosed())
                     {
+                        updateLastRemoteStreamId(streamId);
                         reset(new ResetFrame(streamId, ErrorCode.REFUSED_STREAM_ERROR.code), Callback.NOOP);
                     }
                     else

jetty-http2/http2-server/src/main/java/org/eclipse/jetty/http2/server/HttpTransportOverHTTP2.java

@@ -330,7 +330,7 @@ public class HttpTransportOverHTTP2 implements HttpTransport
 
     public void onStreamFailure(Throwable failure)
     {
-        transportCallback.failed(failure);
+        transportCallback.abort(failure);
     }
 
     public boolean onStreamTimeout(Throwable failure)
@@ -408,17 +408,6 @@ public class HttpTransportOverHTTP2 implements HttpTransport
      *   being reset, or the connection being closed</li>
      *   <li>an asynchronous idle timeout</li>
      * </ul>
-     * <p>The last 2 cases may happen <em>during</em> a send, when the frames
-     * are being generated in the flusher.
-     * In such cases, this class must avoid that the nested callback is notified
-     * while the frame generation is in progress, because the nested callback
-     * may modify other states (such as clearing the {@code HttpOutput._buffer})
-     * that are accessed during frame generation.</p>
-     * <p>The solution implemented in this class works by splitting the send
-     * operation in 3 parts: {@code pre-send}, {@code send} and {@code post-send}.
-     * Asynchronous state changes happening during {@code send} are stored
-     * and only executed in {@code post-send}, therefore never interfering
-     * with frame generation.</p>
      *
      * @see State
      */
@@ -442,14 +431,14 @@ public class HttpTransportOverHTTP2 implements HttpTransport
         {
             Throwable failure = sending(callback, commit);
             if (failure == null)
-            {
                 sendFrame.accept(this);
-                pending();
-            }
             else
-            {
                 callback.failed(failure);
-            }
+        }
+
+        private void abort(Throwable failure)
+        {
+            failed(failure);
         }
 
         private Throwable sending(Callback callback, boolean commit)
@@ -477,58 +466,6 @@ public class HttpTransportOverHTTP2 implements HttpTransport
             }
         }
 
-        private void pending()
-        {
-            Callback callback;
-            boolean commit;
-            Throwable failure;
-            synchronized (this)
-            {
-                switch (_state)
-                {
-                    case SENDING:
-                    {
-                        // The send has not completed the callback yet,
-                        // wait for succeeded() or failed() to be called.
-                        _state = State.PENDING;
-                        return;
-                    }
-                    case SUCCEEDING:
-                    {
-                        // The send already completed successfully, but the
-                        // call to succeeded() was delayed, so call it now.
-                        callback = _callback;
-                        commit = _commit;
-                        failure = null;
-                        reset(null);
-                        break;
-                    }
-                    case FAILING:
-                    {
-                        // The send already completed with a failure, but
-                        // the call to failed() was delayed, so call it now.
-                        callback = _callback;
-                        commit = _commit;
-                        failure = _failure;
-                        reset(failure);
-                        break;
-                    }
-                    default:
-                    {
-                        callback = _callback;
-                        commit = _commit;
-                        failure = new IllegalStateException("Invalid transport state: " + _state);
-                        reset(failure);
-                        break;
-                    }
-                }
-            }
-            if (failure == null)
-                succeed(callback, commit);
-            else
-                fail(callback, commit, failure);
-        }
-
         @Override
         public void succeeded()
         {
@@ -536,30 +473,21 @@ public class HttpTransportOverHTTP2 implements HttpTransport
             boolean commit;
             synchronized (this)
             {
-                switch (_state)
+                if (_state != State.SENDING)
                 {
-                    case SENDING:
-                    {
-                        _state = State.SUCCEEDING;
-                        // Succeeding the callback will be done in postSend().
-                        return;
-                    }
-                    case PENDING:
-                    {
-                        callback = _callback;
-                        commit = _commit;
-                        reset(null);
-                        break;
-                    }
-                    default:
-                    {
-                        // This thread lost the race to succeed the current
-                        // send, as other threads likely already failed it.
-                        return;
-                    }
+                    // This thread lost the race to succeed the current
+                    // send, as other threads likely already failed it.
+                    return;
                 }
+                callback = _callback;
+                commit = _commit;
+                reset(null);
             }
-            succeed(callback, commit);
+            if (LOG.isDebugEnabled())
+                LOG.debug("HTTP2 Response #{}/{} {} success",
+                    stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
+                    commit ? "commit" : "flush");
+            callback.succeeded();
         }
 
         @Override
@@ -569,104 +497,37 @@ public class HttpTransportOverHTTP2 implements HttpTransport
             boolean commit;
             synchronized (this)
             {
-                switch (_state)
+                if (_state != State.SENDING)
                 {
-                    case SENDING:
-                    {
-                        _state = State.FAILING;
-                        _failure = failure;
-                        // Failing the callback will be done in postSend().
-                        return;
-                    }
-                    case IDLE:
-                    case PENDING:
-                    {
-                        callback = _callback;
-                        commit = _commit;
-                        reset(failure);
-                        break;
-                    }
-                    default:
-                    {
-                        // This thread lost the race to fail the current send,
-                        // as other threads already succeeded or failed it.
-                        return;
-                    }
+                    reset(failure);
+                    return;
                 }
+                callback = _callback;
+                commit = _commit;
+                reset(failure);
             }
-            fail(callback, commit, failure);
-        }
-
-        private boolean idleTimeout(Throwable failure)
-        {
-            Callback callback;
-            boolean timeout;
-            synchronized (this)
-            {
-                switch (_state)
-                {
-                    case PENDING:
-                    {
-                        // The send was started but idle timed out, fail it.
-                        callback = _callback;
-                        timeout = true;
-                        reset(failure);
-                        break;
-                    }
-                    case IDLE:
-                        // The application may be suspended, ignore the idle timeout.
-                    case SENDING:
-                        // A send has been started at the same time of an idle timeout;
-                        // Ignore the idle timeout and let the write continue normally.
-                    case SUCCEEDING:
-                    case FAILING:
-                        // An idle timeout during these transient states is ignored.
-                    case FAILED:
-                        // Already failed, ignore the idle timeout.
-                    {
-                        callback = null;
-                        timeout = false;
-                        break;
-                    }
-                    default:
-                    {
-                        // Should not happen, but just in case.
-                        callback = _callback;
-                        if (callback == null)
-                            callback = Callback.NOOP;
-                        timeout = true;
-                        failure = new IllegalStateException("Invalid transport state: " + _state, failure);
-                        reset(failure);
-                        break;
-                    }
-                }
-            }
-            idleTimeout(callback, timeout, failure);
-            return timeout;
-        }
-
-        private void succeed(Callback callback, boolean commit)
-        {
-            if (LOG.isDebugEnabled())
-                LOG.debug("HTTP2 Response #{}/{} {} success",
-                    stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
-                    commit ? "commit" : "flush");
-            callback.succeeded();
-        }
-
-        private void fail(Callback callback, boolean commit, Throwable failure)
-        {
             if (LOG.isDebugEnabled())
                 LOG.debug("HTTP2 Response #{}/{} {} failure",
                     stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
                     commit ? "commit" : "flush",
                     failure);
-            if (callback != null)
-                callback.failed(failure);
+            callback.failed(failure);
         }
 
-        private void idleTimeout(Callback callback, boolean timeout, Throwable failure)
+        private boolean idleTimeout(Throwable failure)
         {
+            Callback callback = null;
+            synchronized (this)
+            {
+                // Ignore idle timeouts if not writing,
+                // as the application may be suspended.
+                if (_state == State.SENDING)
+                {
+                    callback = _callback;
+                    reset(failure);
+                }
+            }
+            boolean timeout = callback != null;
             if (LOG.isDebugEnabled())
                 LOG.debug("HTTP2 Response #{}/{} idle timeout {}",
                     stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
@@ -674,6 +535,18 @@ public class HttpTransportOverHTTP2 implements HttpTransport
                     failure);
             if (timeout)
                 callback.failed(failure);
+            return timeout;
+        }
+
+        @Override
+        public InvocationType getInvocationType()
+        {
+            Callback callback;
+            synchronized (this)
+            {
+                callback = _callback;
+            }
+            return callback != null ? callback.getInvocationType() : Callback.super.getInvocationType();
         }
     }
 
@@ -686,67 +559,12 @@ public class HttpTransportOverHTTP2 implements HttpTransport
     {
         /**
          * <p>No send initiated or in progress.</p>
-         * <p>Next states could be:</p>
-         * <ul>
-         *   <li>{@link #SENDING}, when {@link TransportCallback#send(Callback, boolean, Consumer)}
-         *   is called by the transport to initiate a send</li>
-         *   <li>{@link #FAILED}, when {@link TransportCallback#failed(Throwable)}
-         *   is called by an asynchronous failure</li>
-         * </ul>
          */
         IDLE,
         /**
-         * <p>A send is initiated; the nested callback in {@link TransportCallback}
-         * cannot be notified while in this state.</p>
-         * <p>Next states could be:</p>
-         * <ul>
-         *   <li>{@link #SUCCEEDING}, when {@link TransportCallback#succeeded()}
-         *   is called synchronously because the send succeeded</li>
-         *   <li>{@link #FAILING}, when {@link TransportCallback#failed(Throwable)}
-         *   is called synchronously because the send failed</li>
-         *   <li>{@link #PENDING}, when {@link TransportCallback#pending()}
-         *   is called before the send completes</li>
-         * </ul>
+         * <p>A send is initiated and possibly in progress.</p>
          */
         SENDING,
-        /**
-         * <p>A send was initiated and is now pending, waiting for the {@link TransportCallback}
-         * to be notified of success or failure.</p>
-         * <p>Next states could be:</p>
-         * <ul>
-         *   <li>{@link #IDLE}, when {@link TransportCallback#succeeded()}
-         *   is called because the send succeeded</li>
-         *   <li>{@link #FAILED}, when {@link TransportCallback#failed(Throwable)}
-         *   is called because either the send failed, or an asynchronous failure happened</li>
-         * </ul>
-         */
-        PENDING,
-        /**
-         * <p>A send was initiated and succeeded, but {@link TransportCallback#pending()}
-         * has not been called yet.</p>
-         * <p>This state indicates that the success actions (such as notifying the
-         * {@link TransportCallback} nested callback) must be performed when
-         * {@link TransportCallback#pending()} is called.</p>
-         * <p>Next states could be:</p>
-         * <ul>
-         *   <li>{@link #IDLE}, when {@link TransportCallback#pending()}
-         *   is called</li>
-         * </ul>
-         */
-        SUCCEEDING,
-        /**
-         * <p>A send was initiated and failed, but {@link TransportCallback#pending()}
-         * has not been called yet.</p>
-         * <p>This state indicates that the failure actions (such as notifying the
-         * {@link TransportCallback} nested callback) must be performed when
-         * {@link TransportCallback#pending()} is called.</p>
-         * <p>Next states could be:</p>
-         * <ul>
-         *   <li>{@link #FAILED}, when {@link TransportCallback#pending()}
-         *   is called</li>
-         * </ul>
-         */
-        FAILING,
         /**
          * <p>The terminal state indicating failure of the send.</p>
          */

jetty-io/src/main/java/org/eclipse/jetty/io/AbstractEndPoint.java

@@ -435,7 +435,7 @@ public abstract class AbstractEndPoint extends IdleTimeout implements EndPoint
     {
         Connection oldConnection = getConnection();
 
-        ByteBuffer prefilled = (oldConnection instanceof Connection.UpgradeFrom)
+        ByteBuffer buffer = (oldConnection instanceof Connection.UpgradeFrom)
             ? ((Connection.UpgradeFrom)oldConnection).onUpgradeFrom()
             : null;
         oldConnection.onClose(null);
@@ -443,12 +443,15 @@ public abstract class AbstractEndPoint extends IdleTimeout implements EndPoint
 
         if (LOG.isDebugEnabled())
             LOG.debug("{} upgrading from {} to {} with {}",
-                this, oldConnection, newConnection, BufferUtil.toDetailString(prefilled));
+                this, oldConnection, newConnection, BufferUtil.toDetailString(buffer));
 
-        if (newConnection instanceof Connection.UpgradeTo)
-            ((Connection.UpgradeTo)newConnection).onUpgradeTo(prefilled);
-        else if (BufferUtil.hasContent(prefilled))
-            throw new IllegalStateException("Cannot upgrade: " + newConnection + " does not implement " + Connection.UpgradeTo.class.getName());
+        if (BufferUtil.hasContent(buffer))
+        {
+            if (newConnection instanceof Connection.UpgradeTo)
+                ((Connection.UpgradeTo)newConnection).onUpgradeTo(buffer);
+            else
+                throw new IllegalStateException("Cannot upgrade: " + newConnection + " does not implement " + Connection.UpgradeTo.class.getName());
+        }
 
         newConnection.onOpen();
     }

jetty-io/src/main/java/org/eclipse/jetty/io/ArrayByteBufferPool.java

@@ -23,8 +23,11 @@ import java.util.Arrays;
 import java.util.Objects;
 import java.util.function.IntFunction;
 
+import org.eclipse.jetty.util.BufferUtil;
 import org.eclipse.jetty.util.annotation.ManagedAttribute;
 import org.eclipse.jetty.util.annotation.ManagedObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * <p>A ByteBuffer pool where ByteBuffers are held in queues that are held in array elements.</p>
@@ -35,6 +38,8 @@ import org.eclipse.jetty.util.annotation.ManagedObject;
 @ManagedObject
 public class ArrayByteBufferPool extends AbstractByteBufferPool
 {
+    private static final Logger LOG = LoggerFactory.getLogger(MappedByteBufferPool.class);
+
     private final int _minCapacity;
     private final ByteBufferPool.Bucket[] _direct;
     private final ByteBufferPool.Bucket[] _indirect;
@@ -119,8 +124,18 @@ public class ArrayByteBufferPool extends AbstractByteBufferPool
     {
         if (buffer == null)
             return;
+
+        int capacity = buffer.capacity();
+        // Validate that this buffer is from this pool.
+        if ((capacity % getCapacityFactor()) != 0)
+        {
+            if (LOG.isDebugEnabled())
+                LOG.debug("ByteBuffer {} does not belong to this pool, discarding it", BufferUtil.toDetailString(buffer));
+            return;
+        }
+
         boolean direct = buffer.isDirect();
-        ByteBufferPool.Bucket bucket = bucketFor(buffer.capacity(), direct, this::newBucket);
+        ByteBufferPool.Bucket bucket = bucketFor(capacity, direct, this::newBucket);
         if (bucket != null)
         {
             bucket.release(buffer);

jetty-io/src/main/java/org/eclipse/jetty/io/ByteBufferPool.java

@@ -57,6 +57,18 @@ public interface ByteBufferPool
      */
     public void release(ByteBuffer buffer);
 
+    /**
+     * <p>Removes a {@link ByteBuffer} that was previously obtained with {@link #acquire(int, boolean)}.</p>
+     * <p>The buffer will not be available for further reuse.</p>
+     *
+     * @param buffer the buffer to remove
+     * @see #acquire(int, boolean)
+     * @see #release(ByteBuffer)
+     */
+    default void remove(ByteBuffer buffer)
+    {
+    }
+
     /**
      * <p>Creates a new ByteBuffer of the given capacity and the given directness.</p>
      *

jetty-io/src/main/java/org/eclipse/jetty/io/Connection.java

@@ -99,31 +99,49 @@ public interface Connection extends Closeable
 
     public long getCreatedTimeStamp();
 
+    /**
+     * <p>{@link Connection} implementations implement this interface when they
+     * can upgrade from the protocol they speak (for example HTTP/1.1)
+     * to a different protocol (e.g. HTTP/2).</p>
+     *
+     * @see EndPoint#upgrade(Connection)
+     * @see UpgradeTo
+     */
     public interface UpgradeFrom
     {
         /**
-         * <p>Takes the input buffer from the connection on upgrade.</p>
-         * <p>This method is used to take any unconsumed input from
-         * a connection during an upgrade.</p>
+         * <p>Invoked during an {@link EndPoint#upgrade(Connection) upgrade}
+         * to produce a buffer containing bytes that have not been consumed by
+         * this connection, and that must be consumed by the upgrade-to
+         * connection.</p>
          *
-         * @return A buffer of unconsumed input. The caller must return the buffer
-         * to the bufferpool when consumed and this connection must not.
+         * @return a buffer of unconsumed bytes to pass to the upgrade-to connection.
+         * The buffer does not belong to any pool and should be discarded after
+         * having consumed its bytes.
+         * The returned buffer may be null if there are no unconsumed bytes.
          */
-        ByteBuffer onUpgradeFrom();
+        public ByteBuffer onUpgradeFrom();
     }
 
+    /**
+     * <p>{@link Connection} implementations implement this interface when they
+     * can be upgraded to the protocol they speak (e.g. HTTP/2)
+     * from a different protocol (e.g. HTTP/1.1).</p>
+     */
     public interface UpgradeTo
     {
         /**
-         * <p>Callback method invoked when this connection is upgraded.</p>
-         * <p>This must be called before {@link #onOpen()}.</p>
+         * <p>Invoked during an {@link EndPoint#upgrade(Connection) upgrade}
+         * to receive a buffer containing bytes that have not been consumed by
+         * the upgrade-from connection, and that must be consumed by this
+         * connection.</p>
          *
-         * @param prefilled An optional buffer that can contain prefilled data. Typically this
-         * results from an upgrade of one protocol to the other where the old connection has buffered
-         * data destined for the new connection.  The new connection must take ownership of the buffer
-         * and is responsible for returning it to the buffer pool
+         * @param buffer a non-null buffer of unconsumed bytes received from
+         * the upgrade-from connection.
+         * The buffer does not belong to any pool and should be discarded after
+         * having consumed its bytes.
          */
-        void onUpgradeTo(ByteBuffer prefilled);
+        public void onUpgradeTo(ByteBuffer buffer);
     }
 
     /**

jetty-io/src/main/java/org/eclipse/jetty/io/EndPoint.java

@@ -31,7 +31,7 @@ import org.eclipse.jetty.util.IteratingCallback;
 import org.eclipse.jetty.util.thread.Invocable;
 
 /**
- * A transport EndPoint
+ * <p>EndPoint is the abstraction for an I/O channel that transports bytes.</p>
  *
  * <h3>Asynchronous Methods</h3>
  * <p>The asynchronous scheduling methods of {@link EndPoint}
@@ -40,86 +40,90 @@ import org.eclipse.jetty.util.thread.Invocable;
  * some inefficiencies.</p>
  * <p>This class will frequently be used in conjunction with some of the utility
  * implementations of {@link Callback}, such as {@link FutureCallback} and
- * {@link IteratingCallback}. Examples are:</p>
+ * {@link IteratingCallback}.</p>
  *
- * <h3>Blocking Read</h3>
- * <p>A FutureCallback can be used to block until an endpoint is ready to be filled
- * from:</p>
- * <blockquote><pre>
- * FutureCallback&lt;String&gt; future = new FutureCallback&lt;&gt;();
- * endpoint.fillInterested("ContextObj",future);
- * ...
- * String context = future.get(); // This blocks
- * int filled=endpoint.fill(mybuffer);
- * </pre></blockquote>
+ * <h3>Reads</h3>
+ * <p>A {@link FutureCallback} can be used to block until an endpoint is ready
+ * to fill bytes - the notification will be emitted by the NIO subsystem:</p>
+ * <pre>
+ * FutureCallback callback = new FutureCallback();
+ * endPoint.fillInterested(callback);
  *
- * <h3>Dispatched Read</h3>
- * <p>By using a different callback, the read can be done asynchronously in its own dispatched thread:</p>
- * <blockquote><pre>
- * endpoint.fillInterested("ContextObj",new ExecutorCallback&lt;String&gt;(executor)
+ * // Blocks until read to fill bytes.
+ * callback.get();
+ *
+ * // Now bytes can be filled in a ByteBuffer.
+ * int filled = endPoint.fill(byteBuffer);
+ * </pre>
+ *
+ * <h3>Asynchronous Reads</h3>
+ * <p>A {@link Callback} can be used to read asynchronously in its own dispatched
+ * thread:</p>
+ * <pre>
+ * endPoint.fillInterested(new Callback()
  * {
- *   public void onCompleted(String context)
+ *   public void onSucceeded()
  *   {
- *     int filled=endpoint.fill(mybuffer);
- *     ...
+ *     executor.execute(() -&gt;
+ *     {
+ *       // Fill bytes in a different thread.
+ *       int filled = endPoint.fill(byteBuffer);
+ *     });
+ *   }
+ *   public void onFailed(Throwable failure)
+ *   {
+ *     endPoint.close();
  *   }
- *   public void onFailed(String context,Throwable cause) {...}
  * });
- * </pre></blockquote>
- * <p>The executor callback can also be customized to not dispatch in some circumstances when
- * it knows it can use the callback thread and does not need to dispatch.</p>
+ * </pre>
  *
- * <h3>Blocking Write</h3>
- * <p>The write contract is that the callback complete is not called until all data has been
- * written or there is a failure.  For blocking this looks like:</p>
- * <blockquote><pre>
- * FutureCallback&lt;String&gt; future = new FutureCallback&lt;&gt;();
- * endpoint.write("ContextObj",future,headerBuffer,contentBuffer);
- * String context = future.get(); // This blocks
- * </pre></blockquote>
+ * <h3>Blocking Writes</h3>
+ * <p>The write contract is that the callback is completed when all the bytes
+ * have been written or there is a failure.
+ * Blocking writes look like this:</p>
+ * <pre>
+ * FutureCallback callback = new FutureCallback();
+ * endpoint.write(callback, headerBuffer, contentBuffer);
  *
- * <h3>Dispatched Write</h3>
- * <p>Note also that multiple buffers may be passed in write so that gather writes
- * can be done:</p>
- * <blockquote><pre>
- * endpoint.write("ContextObj",new ExecutorCallback&lt;String&gt;(executor)
- * {
- *   public void onCompleted(String context)
- *   {
- *     int filled=endpoint.fill(mybuffer);
- *     ...
- *   }
- *   public void onFailed(String context,Throwable cause) {...}
- * },headerBuffer,contentBuffer);
- * </pre></blockquote>
+ * // Blocks until the write succeeds or fails.
+ * future.get();
+ * </pre>
+ * <p>Note also that multiple buffers may be passed in {@link #write(Callback, ByteBuffer...)}
+ * so that gather writes can be performed for efficiency.</p>
  */
 public interface EndPoint extends Closeable
 {
     /** 
-     * Marks an <code>EndPoint</code> that wraps another <code>EndPoint</code>.
+     * Marks an {@code EndPoint} that wraps another {@code EndPoint}.
      */
     public interface Wrapper 
     {
         /**
-         * @return The wrapped <code>EndPoint</code>
+         * @return The wrapped {@code EndPoint}
          */
         EndPoint unwrap();
     }
-    
+
     /**
-     * @return The local Inet address to which this <code>EndPoint</code> is bound, or <code>null</code>
-     * if this <code>EndPoint</code> does not represent a network connection.
+     * @return The local Inet address to which this {@code EndPoint} is bound, or {@code null}
+     * if this {@code EndPoint} does not represent a network connection.
      */
     InetSocketAddress getLocalAddress();
 
     /**
-     * @return The remote Inet address to which this <code>EndPoint</code> is bound, or <code>null</code>
-     * if this <code>EndPoint</code> does not represent a network connection.
+     * @return The remote Inet address to which this {@code EndPoint} is bound, or {@code null}
+     * if this {@code EndPoint} does not represent a network connection.
      */
     InetSocketAddress getRemoteAddress();
 
+    /**
+     * @return whether this EndPoint is open
+     */
     boolean isOpen();
 
+    /**
+     * @return the epoch time in milliseconds when this EndPoint was created
+     */
     long getCreatedTimeStamp();
 
     /**
@@ -177,7 +181,7 @@ public interface EndPoint extends Closeable
      *
      * @param buffer The buffer to fill. The position and limit are modified during the fill. After the
      * operation, the position is unchanged and the limit is increased to reflect the new data filled.
-     * @return an <code>int</code> value indicating the number of bytes
+     * @return an {@code int} value indicating the number of bytes
      * filled or -1 if EOF is read or the input is shutdown.
      * @throws IOException if the endpoint is closed.
      */
@@ -252,27 +256,27 @@ public interface EndPoint extends Closeable
     void write(Callback callback, ByteBuffer... buffers) throws WritePendingException;
 
     /**
-     * @return the {@link Connection} associated with this {@link EndPoint}
+     * @return the {@link Connection} associated with this EndPoint
      * @see #setConnection(Connection)
      */
     Connection getConnection();
 
     /**
-     * @param connection the {@link Connection} associated with this {@link EndPoint}
+     * @param connection the {@link Connection} associated with this EndPoint
      * @see #getConnection()
      * @see #upgrade(Connection)
      */
     void setConnection(Connection connection);
 
     /**
-     * <p>Callback method invoked when this {@link EndPoint} is opened.</p>
+     * <p>Callback method invoked when this EndPoint is opened.</p>
      *
      * @see #onClose(Throwable)
      */
     void onOpen();
 
     /**
-     * <p>Callback method invoked when this {@link EndPoint} is close.</p>
+     * <p>Callback method invoked when this {@link EndPoint} is closed.</p>
      *
      * @param cause The reason for the close, or null if a normal close.
      * @see #onOpen()
@@ -280,13 +284,18 @@ public interface EndPoint extends Closeable
     void onClose(Throwable cause);
 
     /**
-     * Upgrade connections.
-     * Close the old connection, update the endpoint and open the new connection.
-     * If the oldConnection is an instance of {@link Connection.UpgradeFrom} then
-     * a prefilled buffer is requested and passed to the newConnection if it is an instance
-     * of {@link Connection.UpgradeTo}
+     * <p>Upgrades this EndPoint from the current connection to the given new connection.</p>
+     * <p>Closes the current connection, links this EndPoint to the new connection and
+     * then opens the new connection.</p>
+     * <p>If the current connection is an instance of {@link Connection.UpgradeFrom} then
+     * a buffer of unconsumed bytes is requested.
+     * If the buffer of unconsumed bytes is non-null and non-empty, then the new
+     * connection is tested: if it is an instance of {@link Connection.UpgradeTo}, then
+     * the unconsumed buffer is passed to the new connection; otherwise, an exception
+     * is thrown since there are unconsumed bytes that cannot be consumed by the new
+     * connection.</p>
      *
-     * @param newConnection The connection to upgrade to
+     * @param newConnection the connection to upgrade to
      */
     public void upgrade(Connection newConnection);
 }

jetty-io/src/main/java/org/eclipse/jetty/io/FillInterest.java

@@ -92,6 +92,8 @@ public abstract class FillInterest
 
     /**
      * Call to signal that a read is now possible.
+     *
+     * @return whether the callback was notified that a read is now possible
      */
     public boolean fillable()
     {

jetty-io/src/main/java/org/eclipse/jetty/io/LeakTrackingByteBufferPool.java

@@ -23,10 +23,13 @@ import java.util.concurrent.atomic.AtomicLong;
 
 import org.eclipse.jetty.util.BufferUtil;
 import org.eclipse.jetty.util.LeakDetector;
+import org.eclipse.jetty.util.annotation.ManagedAttribute;
+import org.eclipse.jetty.util.annotation.ManagedObject;
 import org.eclipse.jetty.util.component.ContainerLifeCycle;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+@ManagedObject
 public class LeakTrackingByteBufferPool extends ContainerLifeCycle implements ByteBufferPool
 {
     private static final Logger LOG = LoggerFactory.getLogger(LeakTrackingByteBufferPool.class);
@@ -47,11 +50,11 @@ public class LeakTrackingByteBufferPool extends ContainerLifeCycle implements By
         }
     };
 
-    private static final boolean NOISY = Boolean.getBoolean(LeakTrackingByteBufferPool.class.getName() + ".NOISY");
-    private final ByteBufferPool delegate;
-    private final AtomicLong leakedReleases = new AtomicLong(0);
     private final AtomicLong leakedAcquires = new AtomicLong(0);
+    private final AtomicLong leakedReleases = new AtomicLong(0);
+    private final AtomicLong leakedRemoves = new AtomicLong(0);
     private final AtomicLong leaked = new AtomicLong(0);
+    private final ByteBufferPool delegate;
 
     public LeakTrackingByteBufferPool(ByteBufferPool delegate)
     {
@@ -64,12 +67,12 @@ public class LeakTrackingByteBufferPool extends ContainerLifeCycle implements By
     public ByteBuffer acquire(int size, boolean direct)
     {
         ByteBuffer buffer = delegate.acquire(size, direct);
-        boolean leaked = leakDetector.acquired(buffer);
-        if (NOISY || !leaked)
+        boolean acquired = leakDetector.acquired(buffer);
+        if (!acquired)
         {
             leakedAcquires.incrementAndGet();
-            LOG.info(String.format("ByteBuffer acquire %s leaked.acquired=%s", leakDetector.id(buffer), leaked ? "normal" : "LEAK"),
-                new Throwable("LeakStack.Acquire"));
+            if (LOG.isDebugEnabled())
+                LOG.debug("ByteBuffer leaked acquire for id {}", leakDetector.id(buffer), new Throwable("acquire"));
         }
         return buffer;
     }
@@ -79,16 +82,36 @@ public class LeakTrackingByteBufferPool extends ContainerLifeCycle implements By
     {
         if (buffer == null)
             return;
-        boolean leaked = leakDetector.released(buffer);
-        if (NOISY || !leaked)
+        boolean released = leakDetector.released(buffer);
+        if (!released)
         {
             leakedReleases.incrementAndGet();
-            LOG.info(String.format("ByteBuffer release %s leaked.released=%s", leakDetector.id(buffer), leaked ? "normal" : "LEAK"), new Throwable(
-                "LeakStack.Release"));
+            if (LOG.isDebugEnabled())
+                LOG.debug("ByteBuffer leaked release for id {}", leakDetector.id(buffer), new Throwable("release"));
         }
         delegate.release(buffer);
     }
 
+    @Override
+    public void remove(ByteBuffer buffer)
+    {
+        if (buffer == null)
+            return;
+        boolean released = leakDetector.released(buffer);
+        if (!released)
+        {
+            leakedRemoves.incrementAndGet();
+            if (LOG.isDebugEnabled())
+                LOG.debug("ByteBuffer leaked remove for id {}", leakDetector.id(buffer), new Throwable("remove"));
+        }
+        delegate.remove(buffer);
+    }
+
+    /**
+     * Clears the tracking data returned by {@link #getLeakedAcquires()},
+     * {@link #getLeakedReleases()}, {@link #getLeakedResources()}.
+     */
+    @ManagedAttribute("Clears the tracking data")
     public void clearTracking()
     {
         leakedAcquires.set(0);
@@ -96,24 +119,36 @@ public class LeakTrackingByteBufferPool extends ContainerLifeCycle implements By
     }
 
     /**
-     * @return count of BufferPool.acquire() calls that detected a leak
+     * @return count of ByteBufferPool.acquire() calls that detected a leak
      */
+    @ManagedAttribute("The number of acquires that produced a leak")
     public long getLeakedAcquires()
     {
         return leakedAcquires.get();
     }
 
     /**
-     * @return count of BufferPool.release() calls that detected a leak
+     * @return count of ByteBufferPool.release() calls that detected a leak
      */
+    @ManagedAttribute("The number of releases that produced a leak")
     public long getLeakedReleases()
     {
         return leakedReleases.get();
     }
 
+    /**
+     * @return count of ByteBufferPool.remove() calls that detected a leak
+     */
+    @ManagedAttribute("The number of removes that produced a leak")
+    public long getLeakedRemoves()
+    {
+        return leakedRemoves.get();
+    }
+
     /**
      * @return count of resources that were acquired but not released
      */
+    @ManagedAttribute("The number of resources that were leaked")
     public long getLeakedResources()
     {
         return leaked.get();

jetty-io/src/main/java/org/eclipse/jetty/io/MappedByteBufferPool.java

@@ -28,6 +28,8 @@ import java.util.function.Function;
 import org.eclipse.jetty.util.BufferUtil;
 import org.eclipse.jetty.util.annotation.ManagedAttribute;
 import org.eclipse.jetty.util.annotation.ManagedObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * <p>A ByteBuffer pool where ByteBuffers are held in queues that are held in a Map.</p>
@@ -38,6 +40,8 @@ import org.eclipse.jetty.util.annotation.ManagedObject;
 @ManagedObject
 public class MappedByteBufferPool extends AbstractByteBufferPool
 {
+    private static final Logger LOG = LoggerFactory.getLogger(MappedByteBufferPool.class);
+
     private final ConcurrentMap<Integer, Bucket> _directBuffers = new ConcurrentHashMap<>();
     private final ConcurrentMap<Integer, Bucket> _heapBuffers = new ConcurrentHashMap<>();
     private final Function<Integer, Bucket> _newBucket;
@@ -127,7 +131,12 @@ public class MappedByteBufferPool extends AbstractByteBufferPool
 
         int capacity = buffer.capacity();
         // Validate that this buffer is from this pool.
-        assert ((capacity % getCapacityFactor()) == 0);
+        if ((capacity % getCapacityFactor()) != 0)
+        {
+            if (LOG.isDebugEnabled())
+                LOG.debug("ByteBuffer {} does not belong to this pool, discarding it", BufferUtil.toDetailString(buffer));
+            return;
+        }
 
         int b = bucketFor(capacity);
         boolean direct = buffer.isDirect();

jetty-io/src/main/java/org/eclipse/jetty/io/ssl/SslConnection.java

@@ -326,11 +326,8 @@ public class SslConnection extends AbstractConnection implements Connection.Upgr
     @Override
     public void onUpgradeTo(ByteBuffer buffer)
     {
-        if (BufferUtil.hasContent(buffer))
-        {
-            acquireEncryptedInput();
-            BufferUtil.append(_encryptedInput, buffer);
-        }
+        acquireEncryptedInput();
+        BufferUtil.append(_encryptedInput, buffer);
     }
 
     @Override

jetty-io/src/test/java/org/eclipse/jetty/io/ArrayByteBufferPoolTest.java

@@ -23,6 +23,7 @@ import java.util.Arrays;
 import java.util.Objects;
 
 import org.eclipse.jetty.io.ByteBufferPool.Bucket;
+import org.eclipse.jetty.util.StringUtil;
 import org.junit.jupiter.api.Test;
 
 import static org.hamcrest.MatcherAssert.assertThat;
@@ -150,6 +151,17 @@ public class ArrayByteBufferPoolTest
         }
     }
 
+    @Test
+    public void testReleaseNonPooledBuffer()
+    {
+        ArrayByteBufferPool bufferPool = new ArrayByteBufferPool();
+
+        // Release a few small non-pool buffers
+        bufferPool.release(ByteBuffer.wrap(StringUtil.getUtf8Bytes("Hello")));
+
+        assertEquals(0, bufferPool.getHeapByteBufferCount());
+    }
+
     @Test
     public void testMaxQueue()
     {

jetty-io/src/test/java/org/eclipse/jetty/io/MappedByteBufferPoolTest.java

@@ -35,7 +35,6 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.junit.jupiter.api.Assertions.assertTrue;
-import static org.junit.jupiter.api.Assertions.fail;
 
 public class MappedByteBufferPoolTest
 {
@@ -95,34 +94,15 @@ public class MappedByteBufferPoolTest
         assertTrue(buckets.isEmpty());
     }
 
-    /**
-     * In a scenario where MappedByteBufferPool is being used improperly,
-     * such as releasing a buffer that wasn't created/acquired by the
-     * MappedByteBufferPool, an assertion is tested for.
-     */
     @Test
-    public void testReleaseAssertion()
+    public void testReleaseNonPooledBuffer()
     {
-        int factor = 1024;
-        MappedByteBufferPool bufferPool = new MappedByteBufferPool(factor);
+        MappedByteBufferPool bufferPool = new MappedByteBufferPool();
 
-        try
-        {
-            // Release a few small non-pool buffers
-            bufferPool.release(ByteBuffer.wrap(StringUtil.getUtf8Bytes("Hello")));
+        // Release a few small non-pool buffers
+        bufferPool.release(ByteBuffer.wrap(StringUtil.getUtf8Bytes("Hello")));
 
-            /* NOTES:
-             *
-             * 1) This test will pass on command line maven build, as its surefire setup uses "-ea" already.
-             * 2) In Eclipse, goto the "Run Configuration" for this test case.
-             *    Select the "Arguments" tab, and make sure "-ea" is present in the text box titled "VM arguments"
-             */
-            fail("Expected java.lang.AssertionError, do you have '-ea' JVM command line option enabled?");
-        }
-        catch (java.lang.AssertionError e)
-        {
-            // Expected path.
-        }
+        assertEquals(0, bufferPool.getHeapByteBufferCount());
     }
 
     @Test

jetty-jaas/src/main/config/modules/jaas.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enable JAAS for deployed webapplications.

jetty-jaspi/src/main/config/modules/jaspi.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enable JASPI authentication for deployed webapplications.

jetty-jmx/src/main/config/modules/jmx-remote.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables remote RMI access to JMX

jetty-jmx/src/main/config/modules/jmx.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables JMX instrumentation for server beans and 

jetty-jndi/src/main/config/modules/jndi.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Adds the Jetty JNDI implementation to the classpath.

jetty-maven-plugin/src/it/jetty-start-distro-mojo-it/jetty-simple-webapp/src/base/modules/testmod.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables test setup

jetty-maven-plugin/src/it/jetty-start-war-distro-mojo-it/jetty-simple-webapp/src/base/modules/testmod.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables test setup

jetty-maven-plugin/src/main/resources/maven.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables an unassembled maven webapp to run in a jetty distro

jetty-memcached/jetty-memcached-sessions/src/main/config/modules/sessions/session-data-cache/xmemcached.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Memcache cache for SessionData

jetty-nosql/src/main/config/modules/session-store-mongo.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables NoSql session management with a MongoDB driver.

jetty-nosql/src/main/config/modules/sessions/mongo/address.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Server/port address connections for session storage

jetty-nosql/src/main/config/modules/sessions/mongo/uri.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 MongoURI connections for session storage

jetty-openid/src/main/config/modules/openid.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Adds OpenId Connect authentication.

jetty-osgi/jetty-osgi-boot-jsp/pom.xml

@@ -56,77 +56,73 @@
             <Bundle-Classpath />
             <Fragment-Host>org.eclipse.jetty.osgi.boot</Fragment-Host>
             <Export-Package>!org.eclipse.jetty.osgi.boot.*</Export-Package>
-            <Import-Package>
-              org.eclipse.jdt.*;resolution:=optional,
-              org.eclipse.jdt.core.compiler.*;resolution:=optional,
-              com.sun.el;resolution:=optional,
-              com.sun.el.lang;resolution:=optional,
-              com.sun.el.parser;resolution:=optional,
-              com.sun.el.util;resolution:=optional,
-              javax.el;version="[3.0,3.1)",
-              javax.servlet;version="[3.1,4.1)",
-              javax.servlet.resources;version="[3.1,4.1)",
-              javax.servlet.jsp.resources;version="[2.3,4.1)",
-              javax.servlet.jsp;version="[2.3,2.4.1)",
-              javax.servlet.jsp.el;version="[2.3,2.4.1)",
-              javax.servlet.jsp.tagext;version="[2.3,2.4.1)",
-              javax.servlet.jsp.jstl.core;version="1.2";resolution:=optional,
-              javax.servlet.jsp.jstl.fmt;version="1.2";resolution:=optional,
-              javax.servlet.jsp.jstl.sql;version="1.2";resolution:=optional,
-              javax.servlet.jsp.jstl.tlv;version="1.2";resolution:=optional,
-              org.apache.el;version="[8.0.23,10)";resolution:=optional,
-              org.apache.el.lang;version="[8.0.23,10)";resolution:=optional,
-              org.apache.el.stream;version="[8.0.23,10)";resolution:=optional,
-              org.apache.el.util;version="[8.0.23,10)";resolution:=optional,
-              org.apache.el.parser;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper.compiler;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper.compiler.tagplugin;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper.runtime;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper.security;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper.servlet;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper.tagplugins.jstl;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper.util;version="[8.0.23,10)";resolution:=optional,
-              org.apache.jasper.xmlparser;version="[8.0.23,10)";resolution:=optional,
-              org.apache.taglibs.standard;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.extra.spath;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.functions;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.lang.jstl;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.lang.jstl.parser;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.lang.jstl.test;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.lang.jstl.test.beans;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.lang.support;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.resources;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.common.core;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.common.fmt;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.common.sql;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.common.xml;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.el.core;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.el.fmt;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.el.sql;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.el.xml;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.rt.core;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.rt.fmt;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.rt.sql;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tag.rt.xml;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tei;version="1.2";resolution:=optional,
-              org.apache.taglibs.standard.tlv;version="1.2";resolution:=optional,
-              org.apache.tomcat;version="[8.0.23,10)";resolution:=optional,
-              org.eclipse.jetty.jsp;version="[$(version;===;${parsedVersion.osgiVersion}),$(version;==+;${parsedVersion.osgiVersion}))";resolution:=optional,
-              org.slf4j.*,
-              org.osgi.*,
-              org.xml.*;resolution:=optional,
-              org.xml.sax.*;resolution:=optional,
-              javax.xml.*;resolution:=optional,
-              org.w3c.dom;resolution:=optional,
-              org.w3c.dom.ls;resolution:=optional,
-              javax.xml.parser;resolution:=optional
+            <Import-Package>org.eclipse.jdt.*;resolution:=optional,
+                org.eclipse.jdt.core.compiler.*;resolution:=optional,
+                com.sun.el;resolution:=optional,
+                com.sun.el.lang;resolution:=optional,
+                com.sun.el.parser;resolution:=optional,
+                com.sun.el.util;resolution:=optional,
+                javax.el;version="[3.0,3.1)",
+                javax.servlet;version="[$(version;==;${servlet.api.version}),$(version;+;${servlet.api.version}))",
+                javax.servlet.resources;version="[$(version;==;${servlet.api.version}),$(version;+;${servlet.api.version}))",
+                javax.servlet.jsp.resources;version="[2.3,4.1)",
+                javax.servlet.jsp;version="[2.3,2.4.1)",
+                javax.servlet.jsp.el;version="[2.3,2.4.1)",
+                javax.servlet.jsp.tagext;version="[2.3,2.4.1)",
+                javax.servlet.jsp.jstl.core;version="1.2";resolution:=optional,
+                javax.servlet.jsp.jstl.fmt;version="1.2";resolution:=optional,
+                javax.servlet.jsp.jstl.sql;version="1.2";resolution:=optional,
+                javax.servlet.jsp.jstl.tlv;version="1.2";resolution:=optional,
+                org.apache.el;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.el.lang;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.el.stream;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.el.util;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.el.parser;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper.compiler;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper.compiler.tagplugin;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper.runtime;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper.security;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper.servlet;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper.tagplugins.jstl;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper.util;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.jasper.xmlparser;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.apache.taglibs.standard;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.extra.spath;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.functions;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.lang.jstl;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.lang.jstl.parser;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.lang.jstl.test;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.lang.jstl.test.beans;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.lang.support;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.resources;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.common.core;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.common.fmt;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.common.sql;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.common.xml;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.el.core;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.el.fmt;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.el.sql;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.el.xml;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.rt.core;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.rt.fmt;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.rt.sql;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tag.rt.xml;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tei;version="1.2";resolution:=optional,
+                org.apache.taglibs.standard.tlv;version="1.2";resolution:=optional,
+                org.apache.tomcat;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))";resolution:=optional,
+                org.eclipse.jetty.jsp;version="[$(version;===;${parsedVersion.osgiVersion}),$(version;==+;${parsedVersion.osgiVersion}))";resolution:=optional,
+                org.osgi.*,
+                org.xml.*;resolution:=optional,
+                org.xml.sax.*;resolution:=optional,
+                javax.xml.*;resolution:=optional,
+                org.w3c.dom;resolution:=optional,
+                org.w3c.dom.ls;resolution:=optional,
+                javax.xml.parser;resolution:=optional
             </Import-Package>
-            <DynamicImport-Package>
-              org.eclipse.jetty.jsp.*;version="[$(version;===;${parsedVersion.osgiVersion}),$(version;==+;${parsedVersion.osgiVersion}))",
-              org.apache.jasper.*;version="8.0.23",
-              org.apache.el.*;version="8.0.23"
-            </DynamicImport-Package>
+            <DynamicImport-Package>org.eclipse.jetty.jsp.*;version="[$(version;===;${parsedVersion.osgiVersion}),$(version;==+;${parsedVersion.osgiVersion}))",
+                org.apache.jasper.*;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))",
+                org.apache.el.*;version="[$(version;===;${jsp.version}),$(version;+;${jsp.version}))"</DynamicImport-Package>
           </instructions>
         </configuration>
       </plugin>

jetty-osgi/jetty-osgi-boot/pom.xml

@@ -70,8 +70,30 @@
           <instructions>
             <Bundle-SymbolicName>org.eclipse.jetty.osgi.boot;singleton:=true</Bundle-SymbolicName>
             <Bundle-Activator>org.eclipse.jetty.osgi.boot.JettyBootstrapActivator</Bundle-Activator>
-            <DynamicImport-Package>org.eclipse.jetty.*;version="[$(version;===;${parsedVersion.osgiVersion}),$(version;==+;${parsedVersion.osgiVersion}))"</DynamicImport-Package>
-            <Import-Package>javax.mail;version="1.4.0";resolution:=optional, javax.mail.event;version="1.4.0";resolution:=optional, javax.mail.internet;version="1.4.0";resolution:=optional, javax.mail.search;version="1.4.0";resolution:=optional, javax.mail.util;version="1.4.0";resolution:=optional, javax.servlet;version="[3.1,4.1)", javax.servlet.http;version="[3.1,4.1)", javax.transaction;version="1.1.0";resolution:=optional, javax.transaction.xa;version="1.1.0";resolution:=optional, org.objectweb.asm;version="5";resolution:=optional, org.osgi.framework, org.osgi.service.cm;version="1.2.0", org.osgi.service.packageadmin, org.osgi.service.startlevel;version="1.0.0", org.osgi.service.url;version="1.0.0", org.osgi.util.tracker;version="1.3.0", org.xml.sax, org.xml.sax.helpers, org.eclipse.jetty.annotations;resolution:=optional, *
+            <DynamicImport-Package>org.eclipse.jetty.*;version="[$(version;===;${parsedVersion.osgiVersion}),$(version;+;${parsedVersion.osgiVersion}))"</DynamicImport-Package>
+            <Import-Package>javax.mail;version="1.4.0";resolution:=optional,
+                javax.mail.event;version="1.4.0";resolution:=optional,
+                javax.mail.internet;version="1.4.0";resolution:=optional,
+                javax.mail.search;version="1.4.0";resolution:=optional,
+                javax.mail.util;version="1.4.0";resolution:=optional,
+                javax.servlet;version="[$(version;==;${servlet.api.version}),$(version;+;${servlet.api.version}))",
+                javax.servlet.http;version="[$(version;==;${servlet.api.version}),$(version;+;${servlet.api.version}))",
+                javax.transaction;version="1.1.0";resolution:=optional,
+                javax.transaction.xa;version="1.1.0";resolution:=optional,
+                org.objectweb.asm;version="$(version;=;${asm.version})";resolution:=optional,
+                org.osgi.framework,
+                org.osgi.service.cm;version="1.2.0",
+                org.osgi.service.packageadmin,
+                org.osgi.service.startlevel;version="1.0.0",
+                org.osgi.service.url;version="1.0.0",
+                org.osgi.util.tracker;version="1.3.0",
+                org.slf4j;resolution:=optional,
+                org.slf4j.spi;resolution:=optional,
+                org.slf4j.helpers;resolution:=optional,
+                org.xml.sax,
+                org.xml.sax.helpers,
+                org.eclipse.jetty.annotations;resolution:=optional,
+                *
             </Import-Package>
             <Require-Capability>
               osgi.extender; filter:="(osgi.extender=osgi.serviceloader.registrar)"

jetty-osgi/jetty-osgi-boot/src/main/java/org/eclipse/jetty/osgi/annotations/AnnotationParser.java

@@ -50,7 +50,7 @@ public class AnnotationParser extends org.eclipse.jetty.annotations.AnnotationPa
 
     public AnnotationParser(int javaPlatform)
     {
-        super(javaPlatform, Opcodes.ASM7);
+        super(javaPlatform);
     }
 
     /**
@@ -60,7 +60,7 @@ public class AnnotationParser extends org.eclipse.jetty.annotations.AnnotationPa
      * @return the resource for the bundle
      * @throws Exception if unable to create the resource reference
      */
-    protected Resource indexBundle(Bundle bundle) throws Exception
+    public Resource indexBundle(Bundle bundle) throws Exception
     {
         File bundleFile = BundleFileLocatorHelperFactory.getFactory().getHelper().getBundleInstallLocation(bundle);
         Resource resource = Resource.newResource(bundleFile.toURI());
@@ -114,7 +114,7 @@ public class AnnotationParser extends org.eclipse.jetty.annotations.AnnotationPa
         }
     }
 
-    protected void parse(Set<? extends Handler> handlers, Bundle bundle)
+    public void parse(Set<? extends Handler> handlers, Bundle bundle)
         throws Exception
     {
         URI uri = _bundleToUri.get(bundle);
@@ -211,10 +211,17 @@ public class AnnotationParser extends org.eclipse.jetty.annotations.AnnotationPa
                 //or the bundle classpath wasn't simply ".", so skip it
                 continue;
             }
+
+            if (!isValidClassFileName(name))
+            {
+                continue; //eg skip module-info.class 
+            }
+            
             //transform into a classname to pass to the resolver
             String shortName = StringUtil.replace(name, '/', '.').substring(0, name.length() - 6);
 
             addParsedClass(shortName, getResource(bundle));
+
             try (InputStream classInputStream = classUrl.openStream())
             {
                 scanClass(handlers, getResource(bundle), classInputStream);

jetty-osgi/test-jetty-osgi-context/pom.xml

@@ -77,7 +77,7 @@
             <Import-Package>
               javax.servlet;version="[3.1,4.1)", javax.servlet.resources;version="[3.1,4.1)", org.osgi.framework, org.osgi.service.cm;version="1.2.0", org.osgi.service.packageadmin, org.osgi.service.startlevel;version="1.0.0", org.osgi.service.url;version="1.0.0", org.osgi.util.tracker;version="1.3.0", org.slf4j;resolution:=optional, org.slf4j.spi;resolution:=optional, org.slf4j.helpers;resolution:=optional, org.xml.sax, org.xml.sax.helpers, *
             </Import-Package>
-            <DynamicImport-Package>org.eclipse.jetty.*;version="[9.1,10.0)"</DynamicImport-Package>
+            <DynamicImport-Package>org.eclipse.jetty.*;version="[$(version;==;${parsedVersion.osgiVersion}),$(version;+;${parsedVersion.osgiVersion}))"</DynamicImport-Package>
           </instructions>
         </configuration>
       </plugin>

jetty-osgi/test-jetty-osgi-server/pom.xml

@@ -69,7 +69,7 @@
             <Import-Package>
               javax.servlet;version="[3.1,4.1)", javax.servlet.resources;version="[3.1,4.1)", org.osgi.framework, org.osgi.service.cm;version="1.2.0", org.osgi.service.packageadmin, org.osgi.service.startlevel;version="1.0.o", org.osgi.service.url;version="1.0.0", org.osgi.util.tracker;version="1.3.0", org.slf4j;resolution:=optional, org.slf4j.spi;resolution:=optional, org.slf4j.helpers;resolution:=optional, org.xml.sax, org.xml.sax.helpers, *
             </Import-Package>
-            <DynamicImport-Package>org.eclipse.jetty.*;version="[9.1,10.0)"</DynamicImport-Package>
+            <DynamicImport-Package>org.eclipse.jetty.*;version="[$(version;==;${parsedVersion.osgiVersion}),$(version;+;${parsedVersion.osgiVersion}))"</DynamicImport-Package>
           </instructions>
         </configuration>
       </plugin>

jetty-osgi/test-jetty-osgi/pom.xml

@@ -73,7 +73,6 @@
       <groupId>org.ops4j.pax.tinybundles</groupId>
       <artifactId>tinybundles</artifactId>
       <version>3.0.0</version>
-      <scope>test</scope>
       <exclusions>
         <exclusion>
           <groupId>biz.aQute.bnd</groupId>

jetty-osgi/test-jetty-osgi/src/test/java/org/eclipse/jetty/osgi/test/TestJettyOSGiAnnotationParser.java

@@ -0,0 +1,94 @@
+//
+// ========================================================================
+// Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
+//
+// This program and the accompanying materials are made available under
+// the terms of the Eclipse Public License 2.0 which is available at
+// https://www.eclipse.org/legal/epl-2.0
+//
+// This Source Code may also be made available under the following
+// Secondary Licenses when the conditions for such availability set
+// forth in the Eclipse Public License, v. 2.0 are satisfied:
+// the Apache License v2.0 which is available at
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+// ========================================================================
+//
+
+package org.eclipse.jetty.osgi.test;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.concurrent.ConcurrentHashMap;
+import javax.inject.Inject;
+
+import aQute.bnd.osgi.Constants;
+import org.eclipse.jetty.annotations.ClassInheritanceHandler;
+import org.eclipse.jetty.osgi.annotations.AnnotationParser;
+import org.eclipse.jetty.toolchain.test.MavenTestingUtils;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.ops4j.pax.exam.Configuration;
+import org.ops4j.pax.exam.CoreOptions;
+import org.ops4j.pax.exam.Option;
+import org.ops4j.pax.exam.junit.PaxExam;
+import org.ops4j.pax.tinybundles.core.TinyBundle;
+import org.ops4j.pax.tinybundles.core.TinyBundles;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+
+import static org.junit.Assert.assertTrue;
+import static org.ops4j.pax.exam.CoreOptions.mavenBundle;
+/**
+ * TestJettyOSGiAnnotationParser
+ *
+ */
+
+@RunWith(PaxExam.class)
+public class TestJettyOSGiAnnotationParser
+{
+    @Inject
+    BundleContext bundleContext = null;
+
+    @Configuration
+    public static Option[] configure() throws IOException
+    {
+        ArrayList<Option> options = new ArrayList<>();
+        options.add(TestOSGiUtil.optionalRemoteDebug());
+        options.add(CoreOptions.junitBundles());
+        options.addAll(TestOSGiUtil.coreJettyDependencies());
+        
+        //get a reference to a pre-prepared module-info
+        Path path = Paths.get("src", "test", "resources", "module-info.clazz");
+        File moduleInfo = path.toFile();
+        assertTrue(moduleInfo.exists());
+        
+        TinyBundle bundle = TinyBundles.bundle();
+        bundle.set(Constants.BUNDLE_SYMBOLICNAME, "bundle.with.module.info");
+        bundle.add("module-info.class", new FileInputStream(moduleInfo)); //copy it into the fake bundle
+        options.add(CoreOptions.streamBundle(bundle.build()).startLevel(1));
+        return options.toArray(new Option[options.size()]);
+    }
+
+    @Test
+    public void testParse() throws Exception
+    {
+        
+        //test the osgi annotation parser ignore the module-info.class file in the fake bundle
+        //Get a reference to the deployed fake bundle
+        Bundle b = TestOSGiUtil.getBundle(bundleContext, "bundle.with.module.info");
+        AnnotationParser parser = new AnnotationParser(0);
+        parser.indexBundle(b);
+        ClassInheritanceHandler handler = new ClassInheritanceHandler(new ConcurrentHashMap<>());
+        parser.parse(Collections.singleton(handler), b);
+
+    }
+}

jetty-osgi/test-jetty-osgi/src/test/java/org/eclipse/jetty/osgi/test/TestJettyOSGiBootWithJsp.java

@@ -20,7 +20,6 @@ package org.eclipse.jetty.osgi.test;
 
 import java.util.ArrayList;
 import java.util.List;
-
 import javax.inject.Inject;
 
 import org.eclipse.jetty.client.HttpClient;
@@ -54,7 +53,7 @@ public class TestJettyOSGiBootWithJsp
     public static Option[] configure()
     {
         ArrayList<Option> options = new ArrayList<>();
-        
+
         options.addAll(TestOSGiUtil.configurePaxExamLogging());
 
         options.add(CoreOptions.junitBundles());

jetty-osgi/test-jetty-osgi/src/test/resources/module-info.java

@@ -0,0 +1,21 @@
+//
+// ========================================================================
+// Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
+//
+// This program and the accompanying materials are made available under
+// the terms of the Eclipse Public License 2.0 which is available at
+// https://www.eclipse.org/legal/epl-2.0
+//
+// This Source Code may also be made available under the following
+// Secondary Licenses when the conditions for such availability set
+// forth in the Eclipse Public License, v. 2.0 are satisfied:
+// the Apache License v2.0 which is available at
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+// ========================================================================
+//
+
+module com.bubble
+{
+}

jetty-plus/src/test/java/org/eclipse/jetty/plus/annotation/LifeCycleCallbackCollectionTest.java

@@ -19,7 +19,6 @@
 package org.eclipse.jetty.plus.annotation;
 
 import java.lang.reflect.Method;
-
 import javax.servlet.http.HttpServlet;
 
 import org.eclipse.jetty.plus.webapp.PlusDecorator;
@@ -41,12 +40,12 @@ public class LifeCycleCallbackCollectionTest
     {
         public static int postConstructCount = 0;
         public static int preDestroyCount = 0;
-        
+
         public void postconstruct()
         {
             ++postConstructCount;
         }
-        
+
         public void predestroy()
         {
             ++preDestroyCount;
@@ -55,7 +54,6 @@ public class LifeCycleCallbackCollectionTest
 
     /**
      * An unsupported lifecycle callback type
-     *
      */
     public class TestLifeCycleCallback extends LifeCycleCallback
     {
@@ -79,7 +77,6 @@ public class LifeCycleCallbackCollectionTest
     /**
      * A class that we can use to simulate having PostConstruct and
      * PreDestroy annotations on.
-     * 
      */
     public class SomeTestClass
     {
@@ -177,7 +174,7 @@ public class LifeCycleCallbackCollectionTest
             //expected
         }
     }
-    
+
     @Test
     public void testServletPostConstructPreDestroy() throws Exception
     {
@@ -186,7 +183,7 @@ public class LifeCycleCallbackCollectionTest
         context.setResourceBase(MavenTestingUtils.getTargetTestingDir("predestroy-test").toURI().toURL().toString());
         context.setContextPath("/");
         server.setHandler(context);
-        
+
         //add a non-async servlet
         ServletHolder notAsync = new ServletHolder();
         notAsync.setHeldClass(TestServlet.class);
@@ -194,7 +191,7 @@ public class LifeCycleCallbackCollectionTest
         notAsync.setAsyncSupported(false);
         notAsync.setInitOrder(1);
         context.getServletHandler().addServletWithMapping(notAsync, "/notasync/*");
-        
+
         //add an async servlet
         ServletHolder async = new ServletHolder();
         async.setHeldClass(TestServlet.class);
@@ -202,7 +199,7 @@ public class LifeCycleCallbackCollectionTest
         async.setAsyncSupported(true);
         async.setInitOrder(1);
         context.getServletHandler().addServletWithMapping(async, "/async/*");
-        
+
         //add a run-as servlet
         ServletHolder runas = new ServletHolder();
         runas.setHeldClass(TestServlet.class);
@@ -210,7 +207,7 @@ public class LifeCycleCallbackCollectionTest
         runas.setRunAsRole("admin");
         runas.setInitOrder(1);
         context.getServletHandler().addServletWithMapping(runas, "/runas/*");
-        
+
         //add both run-as and non async servlet
         ServletHolder both = new ServletHolder();
         both.setHeldClass(TestServlet.class);
@@ -219,7 +216,7 @@ public class LifeCycleCallbackCollectionTest
         both.setAsyncSupported(false);
         both.setInitOrder(1);
         context.getServletHandler().addServletWithMapping(both, "/both/*");
-        
+
         //Make fake lifecycle callbacks for all servlets
         LifeCycleCallbackCollection collection = new LifeCycleCallbackCollection();
         context.setAttribute(LifeCycleCallbackCollection.LIFECYCLE_CALLBACK_COLLECTION, collection);
@@ -227,28 +224,28 @@ public class LifeCycleCallbackCollectionTest
         collection.add(pcNotAsync);
         PreDestroyCallback pdNotAsync = new PreDestroyCallback(TestServlet.class, "predestroy");
         collection.add(pdNotAsync);
-        
+
         PostConstructCallback pcAsync = new PostConstructCallback(TestServlet.class, "postconstruct");
         collection.add(pcAsync);
         PreDestroyCallback pdAsync = new PreDestroyCallback(TestServlet.class, "predestroy");
         collection.add(pdAsync);
-        
+
         PostConstructCallback pcRunAs = new PostConstructCallback(TestServlet.class, "postconstruct");
         collection.add(pcRunAs);
         PreDestroyCallback pdRunAs = new PreDestroyCallback(TestServlet.class, "predestroy");
         collection.add(pdRunAs);
-        
+
         PostConstructCallback pcBoth = new PostConstructCallback(TestServlet.class, "postconstruct");
         collection.add(pcBoth);
         PreDestroyCallback pdBoth = new PreDestroyCallback(TestServlet.class, "predestroy");
         collection.add(pdBoth);
-        
+
         server.start();
-        
+
         assertEquals(4, TestServlet.postConstructCount);
-        
+
         server.stop();
-        
+
         assertEquals(4, TestServlet.preDestroyCount);
     }
 

jetty-proxy/src/main/config/modules/proxy.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enable the Jetty Proxy, that allows the server to act

jetty-proxy/src/main/java/org/eclipse/jetty/proxy/ConnectHandler.java

@@ -606,7 +606,7 @@ public class ConnectHandler extends HandlerWrapper
 
     public class DownstreamConnection extends ProxyConnection implements Connection.UpgradeTo
     {
-        private ByteBuffer buffer = BufferUtil.EMPTY_BUFFER;
+        private ByteBuffer buffer;
 
         public DownstreamConnection(EndPoint endPoint, Executor executor, ByteBufferPool bufferPool, ConcurrentMap<String, Object> context)
         {
@@ -616,20 +616,27 @@ public class ConnectHandler extends HandlerWrapper
         @Override
         public void onUpgradeTo(ByteBuffer buffer)
         {
-            if (buffer != null)
-                this.buffer = buffer;
+            this.buffer = buffer;
         }
 
         @Override
         public void onOpen()
         {
             super.onOpen();
-            final int remaining = buffer.remaining();
+
+            if (buffer == null)
+            {
+                fillInterested();
+                return;
+            }
+
+            int remaining = buffer.remaining();
             write(getConnection().getEndPoint(), buffer, new Callback()
             {
                 @Override
                 public void succeeded()
                 {
+                    buffer = null;
                     if (LOG.isDebugEnabled())
                         LOG.debug("{} wrote initial {} bytes to server", DownstreamConnection.this, remaining);
                     fillInterested();
@@ -638,6 +645,7 @@ public class ConnectHandler extends HandlerWrapper
                 @Override
                 public void failed(Throwable x)
                 {
+                    buffer = null;
                     if (LOG.isDebugEnabled())
                         LOG.debug(this + " failed to write initial " + remaining + " bytes to server", x);
                     close();

jetty-quickstart/src/main/config/modules/quickstart.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enables the Jetty Quickstart module for rapid

jetty-rewrite/src/main/config/modules/rewrite-compactpath.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Add a rule to the rewrite module to compact paths so that double slashes

jetty-security/src/main/config/modules/security.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Adds servlet standard security handling to the classpath.

jetty-server/src/main/config/etc/jetty-ssl-context-reload.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0"?><!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd">
+
+<Configure id="Server" class="org.eclipse.jetty.server.Server">
+  <Call name="addBean">
+    <Arg>
+      <New id="keyStoreScanner" class="org.eclipse.jetty.util.ssl.KeyStoreScanner">
+        <Arg><Ref refid="sslContextFactory"/></Arg>
+        <Set name="scanInterval"><Property name="jetty.sslContext.reload.scanInterval" default="1"/></Set>
+      </New>
+    </Arg>
+  </Call>
+</Configure>

jetty-server/src/main/config/etc/jetty.xml

@@ -74,6 +74,7 @@
       <Set name="httpCompliance"><Call class="org.eclipse.jetty.http.HttpCompliance" name="from"><Arg><Property name="jetty.httpConfig.compliance" deprecated="jetty.http.compliance" default="RFC7230"/></Arg></Call></Set>
       <Set name="requestCookieCompliance"><Call class="org.eclipse.jetty.http.CookieCompliance" name="valueOf"><Arg><Property name="jetty.httpConfig.requestCookieCompliance" default="RFC6265"/></Arg></Call></Set>
       <Set name="responseCookieCompliance"><Call class="org.eclipse.jetty.http.CookieCompliance" name="valueOf"><Arg><Property name="jetty.httpConfig.responseCookieCompliance" default="RFC6265"/></Arg></Call></Set>
+      <Set name="relativeRedirectAllowed"><Property name="jetty.httpConfig.relativeRedirectAllowed" default="false"/></Set>
     </New>
 
     <!-- =========================================================== -->

jetty-server/src/main/config/modules/acceptratelimit.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enable a server wide accept rate limit

jetty-server/src/main/config/modules/bytebufferpool.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Configures the ByteBufferPool used by ServerConnectors.

jetty-server/src/main/config/modules/connectionlimit.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Enable a server wide connection limit

jetty-server/src/main/config/modules/customrequestlog.mod

@@ -1,4 +1,4 @@
-DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
+# DO NOT EDIT - See: https://www.eclipse.org/jetty/documentation/current/startup-modules.html
 
 [description]
 Deprecated name for requestlog using custom request logger