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Correctly handle multiple calls to DefaultHttp2StreamChannel.Unsafe.close(...) 

Motivation:

Calling DefaultHttp2StreamChannel.Unsafe.close(...) multiple times should not fail.

Modification:

- Correctly handle multiple calls to DefaultHttp2StreamChannel.Unsafe.close(...)
- Complete closePromise and promise that is given to close(...) in the correct order.
- Add unit test

Result:

Fixes [#7628] and [#7641]
This commit is contained in:
Norman Maurer 2018-01-26 09:04:49 +01:00
parent b1695fe17d
commit b423a35783
2 changed files with 54 additions and 42 deletions
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84
codec-http2/src/main/java/io/netty/handler/codec/http2/Http2MultiplexCodec.java
View File

@ -32,7 +32,6 @@ import io.netty.channel.ChannelPromise;
import io.netty.channel.DefaultChannelConfig;
import io.netty.channel.DefaultChannelPipeline;
import io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator;
import io.netty.channel.DelegatingChannelPromiseNotifier;
import io.netty.channel.EventLoop;
import io.netty.channel.MessageSizeEstimator;
import io.netty.channel.RecvByteBufAllocator;
@ -768,7 +767,7 @@ public class Http2MultiplexCodec extends Http2FrameCodec {
@SuppressWarnings("deprecation")
private RecvByteBufAllocator.ExtendedHandle recvHandle;
private boolean writeDoneAndNoFlush;
private ChannelPromise pendingClosePromise;
private boolean closeInitiated;
@Override
public void connect(final SocketAddress remoteAddress,
@ -831,58 +830,59 @@ public class Http2MultiplexCodec extends Http2FrameCodec {
@Override
public void disconnect(ChannelPromise promise) {
if (!promise.setUncancellable()) {
return;
}
close(promise);
}
@Override
public void close(ChannelPromise promise) {
public void close(final ChannelPromise promise) {
if (!promise.setUncancellable()) {
return;
}
if (closePromise.isDone()) {
promise.setFailure(new ClosedChannelException());
return;
}
if (pendingClosePromise != null) {
pendingClosePromise.addListener(new DelegatingChannelPromiseNotifier(promise));
return;
}
pendingClosePromise = promise;
try {
closePending = false;
fireChannelReadPending = false;
// Only ever send a reset frame if the connection is still alive as otherwise it makes no sense at
// all anyway.
if (parent().isActive() && !streamClosedWithoutError && isStreamIdValid(stream().id())) {
Http2StreamFrame resetFrame = new DefaultHttp2ResetFrame(Http2Error.CANCEL).stream(stream());
write(resetFrame, unsafe().voidPromise());
flush();
}
if (inboundBuffer != null) {
for (;;) {
Object msg = inboundBuffer.poll();
if (msg == null) {
break;
if (closeInitiated) {
if (closePromise.isDone()) {
// Closed already.
promise.setSuccess();
} else if (!(promise instanceof VoidChannelPromise)) { // Only needed if no VoidChannelPromise.
// This means close() was called before so we just register a listener and return
closePromise.addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
promise.setSuccess();
}
ReferenceCountUtil.release(msg);
});
}
return;
}
closeInitiated = true;
closePending = false;
fireChannelReadPending = false;
// Only ever send a reset frame if the connection is still alive as otherwise it makes no sense at
// all anyway.
if (parent().isActive() && !streamClosedWithoutError && isStreamIdValid(stream().id())) {
Http2StreamFrame resetFrame = new DefaultHttp2ResetFrame(Http2Error.CANCEL).stream(stream());
write(resetFrame, unsafe().voidPromise());
flush();
}
if (inboundBuffer != null) {
for (;;) {
Object msg = inboundBuffer.poll();
if (msg == null) {
break;
}
ReferenceCountUtil.release(msg);
}
}
// The promise should be notified before we call fireChannelInactive().
promise.setSuccess();
closePromise.setSuccess();
// The promise should be notified before we call fireChannelInactive().
closePromise.setSuccess();
promise.setSuccess();
pipeline().fireChannelInactive();
if (isRegistered()) {
deregister(unsafe().voidPromise());
}
} finally {
pendingClosePromise = null;
pipeline().fireChannelInactive();
if (isRegistered()) {
deregister(unsafe().voidPromise());
}
}

12
codec-http2/src/test/java/io/netty/handler/codec/http2/Http2MultiplexCodecTest.java
View File

@ -464,6 +464,18 @@ public class Http2MultiplexCodecTest {
assertSame(headers, headers2);
}
@Test
public void callUnsafeCloseMultipleTimes() {
LastInboundHandler inboundHandler = streamActiveAndWriteHeaders(inboundStream);
Http2StreamChannel childChannel = (Http2StreamChannel) inboundHandler.channel();
childChannel.unsafe().close(childChannel.voidPromise());
ChannelPromise promise = childChannel.newPromise();
childChannel.unsafe().close(promise);
promise.syncUninterruptibly();
childChannel.closeFuture().syncUninterruptibly();
}
private LastInboundHandler streamActiveAndWriteHeaders(Http2FrameStream stream) {
LastInboundHandler inboundHandler = new LastInboundHandler();
childChannelInitializer.handler = inboundHandler;