org.apache.flink.runtime.io.network.netty.NettyMessage.PartitionRequest Java Examples

The following examples show how to use org.apache.flink.runtime.io.network.netty.NettyMessage.PartitionRequest. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: PartitionRequestServerHandlerTest.java    From flink with Apache License 2.0 6 votes vote down vote up
/**
 * Tests that {@link PartitionRequestServerHandler} responds {@link ErrorResponse} with wrapped
 * {@link PartitionNotFoundException} after receiving invalid {@link PartitionRequest}.
 */
@Test
public void testResponsePartitionNotFoundException() {
	final PartitionRequestServerHandler serverHandler = new PartitionRequestServerHandler(
		new ResultPartitionManager(),
		new TaskEventDispatcher(),
		new PartitionRequestQueue(),
		true);
	final EmbeddedChannel channel = new EmbeddedChannel(serverHandler);
	final ResultPartitionID partitionId = new ResultPartitionID();

	// Write the message of partition request to server
	channel.writeInbound(new PartitionRequest(partitionId, 0, new InputChannelID(), 2));
	channel.runPendingTasks();

	// Read the response message after handling partition request
	final Object msg = channel.readOutbound();
	assertThat(msg, instanceOf(ErrorResponse.class));

	final ErrorResponse err = (ErrorResponse) msg;
	assertThat(err.cause, instanceOf(PartitionNotFoundException.class));

	final ResultPartitionID actualPartitionId = ((PartitionNotFoundException) err.cause).getPartitionId();
	assertThat(partitionId, is(actualPartitionId));
}
 
Example #2
Source File: PartitionRequestServerHandlerTest.java    From flink with Apache License 2.0 6 votes vote down vote up
/**
 * Tests that {@link PartitionRequestServerHandler} responds {@link ErrorResponse} with wrapped
 * {@link PartitionNotFoundException} after receiving invalid {@link PartitionRequest}.
 */
@Test
public void testResponsePartitionNotFoundException() {
	final PartitionRequestServerHandler serverHandler = new PartitionRequestServerHandler(
		new ResultPartitionManager(),
		new TaskEventDispatcher(),
		new PartitionRequestQueue());
	final EmbeddedChannel channel = new EmbeddedChannel(serverHandler);
	final ResultPartitionID partitionId = new ResultPartitionID();

	// Write the message of partition request to server
	channel.writeInbound(new PartitionRequest(partitionId, 0, new InputChannelID(), 2));
	channel.runPendingTasks();

	// Read the response message after handling partition request
	final Object msg = channel.readOutbound();
	assertThat(msg, instanceOf(ErrorResponse.class));

	final ErrorResponse err = (ErrorResponse) msg;
	assertThat(err.cause, instanceOf(PartitionNotFoundException.class));

	final ResultPartitionID actualPartitionId = ((PartitionNotFoundException) err.cause).getPartitionId();
	assertThat(partitionId, is(actualPartitionId));
}
 
Example #3
Source File: PartitionRequestClientTest.java    From Flink-CEPplus with Apache License 2.0 5 votes vote down vote up
@Test
public void testDoublePartitionRequest() throws Exception {
	final PartitionRequestClientHandler handler = new PartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = new PartitionRequestClient(
		channel, handler, mock(ConnectionID.class), mock(PartitionRequestClientFactory.class));

	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32);
	final SingleInputGate inputGate = createSingleInputGate();
	final RemoteInputChannel inputChannel = createRemoteInputChannel(inputGate, client);

	try {
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		final int numExclusiveBuffers = 2;
		inputGate.assignExclusiveSegments(networkBufferPool, numExclusiveBuffers);
		inputChannel.requestSubpartition(0);

		// The input channel should only send one partition request
		assertTrue(channel.isWritable());
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(inputChannel.getInputChannelId(), ((PartitionRequest) readFromOutbound).receiverId);
		assertEquals(numExclusiveBuffers, ((PartitionRequest) readFromOutbound).credit);

		assertNull(channel.readOutbound());
	} finally {
		// Release all the buffer resources
		inputGate.releaseAllResources();

		networkBufferPool.destroyAllBufferPools();
		networkBufferPool.destroy();
	}
}
 
Example #4
Source File: NettyPartitionRequestClientTest.java    From flink with Apache License 2.0 5 votes vote down vote up
@Test
public void testDoublePartitionRequest() throws Exception {
	final PartitionRequestClientHandler handler = new PartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = new NettyPartitionRequestClient(
		channel, handler, mock(ConnectionID.class), mock(PartitionRequestClientFactory.class));

	final int numExclusiveBuffers = 2;
	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32, numExclusiveBuffers);
	final SingleInputGate inputGate = createSingleInputGate(1);
	final RemoteInputChannel inputChannel = createRemoteInputChannel(inputGate, client, networkBufferPool);

	try {
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		inputGate.assignExclusiveSegments();
		inputChannel.requestSubpartition(0);

		// The input channel should only send one partition request
		assertTrue(channel.isWritable());
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(inputChannel.getInputChannelId(), ((PartitionRequest) readFromOutbound).receiverId);
		assertEquals(numExclusiveBuffers, ((PartitionRequest) readFromOutbound).credit);

		assertNull(channel.readOutbound());
	} finally {
		// Release all the buffer resources
		inputGate.close();

		networkBufferPool.destroyAllBufferPools();
		networkBufferPool.destroy();
	}
}
 
Example #5
Source File: NettyPartitionRequestClientTest.java    From flink with Apache License 2.0 5 votes vote down vote up
@Test
public void testDoublePartitionRequest() throws Exception {
	final CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = createPartitionRequestClient(channel, handler);

	final int numExclusiveBuffers = 2;
	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32, numExclusiveBuffers);
	final SingleInputGate inputGate = createSingleInputGate(1, networkBufferPool);
	final RemoteInputChannel inputChannel = createRemoteInputChannel(inputGate, client);

	try {
		inputGate.setInputChannels(inputChannel);
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		inputGate.assignExclusiveSegments();
		inputChannel.requestSubpartition(0);

		// The input channel should only send one partition request
		assertTrue(channel.isWritable());
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(inputChannel.getInputChannelId(), ((PartitionRequest) readFromOutbound).receiverId);
		assertEquals(numExclusiveBuffers, ((PartitionRequest) readFromOutbound).credit);

		assertNull(channel.readOutbound());
	} finally {
		// Release all the buffer resources
		inputGate.close();

		networkBufferPool.destroyAllBufferPools();
		networkBufferPool.destroy();
	}
}
 
Example #6
Source File: NettyPartitionRequestClientTest.java    From flink with Apache License 2.0 5 votes vote down vote up
@Test
public void testResumeConsumption() throws Exception {
	final CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = createPartitionRequestClient(channel, handler);

	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32, 2);
	final SingleInputGate inputGate = createSingleInputGate(1, networkBufferPool);
	final RemoteInputChannel inputChannel = createRemoteInputChannel(inputGate, client);

	try {
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		inputGate.assignExclusiveSegments();
		inputChannel.requestSubpartition(0);

		inputChannel.resumeConsumption();
		channel.runPendingTasks();
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));

		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(ResumeConsumption.class));
		assertEquals(inputChannel.getInputChannelId(), ((ResumeConsumption) readFromOutbound).receiverId);

		assertNull(channel.readOutbound());
	} finally {
		// Release all the buffer resources
		inputGate.close();

		networkBufferPool.destroyAllBufferPools();
		networkBufferPool.destroy();
	}
}
 
Example #7
Source File: CreditBasedPartitionRequestClientHandlerTest.java    From Flink-CEPplus with Apache License 2.0 4 votes vote down vote up
/**
 * Verifies that {@link RemoteInputChannel} is enqueued in the pipeline for notifying credits,
 * and verifies the behaviour of credit notification by triggering channel's writability changed.
 */
@Test
public void testNotifyCreditAvailable() throws Exception {
	final CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = new PartitionRequestClient(
		channel, handler, mock(ConnectionID.class), mock(PartitionRequestClientFactory.class));

	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32);
	final SingleInputGate inputGate = createSingleInputGate();
	final RemoteInputChannel inputChannel1 = createRemoteInputChannel(inputGate, client);
	final RemoteInputChannel inputChannel2 = createRemoteInputChannel(inputGate, client);
	try {
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		final int numExclusiveBuffers = 2;
		inputGate.assignExclusiveSegments(networkBufferPool, numExclusiveBuffers);

		inputChannel1.requestSubpartition(0);
		inputChannel2.requestSubpartition(0);

		// The two input channels should send partition requests
		assertTrue(channel.isWritable());
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(inputChannel1.getInputChannelId(), ((PartitionRequest) readFromOutbound).receiverId);
		assertEquals(2, ((PartitionRequest) readFromOutbound).credit);

		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(inputChannel2.getInputChannelId(), ((PartitionRequest) readFromOutbound).receiverId);
		assertEquals(2, ((PartitionRequest) readFromOutbound).credit);

		// The buffer response will take one available buffer from input channel, and it will trigger
		// requesting (backlog + numExclusiveBuffers - numAvailableBuffers) floating buffers
		final BufferResponse bufferResponse1 = createBufferResponse(
			TestBufferFactory.createBuffer(32), 0, inputChannel1.getInputChannelId(), 1);
		final BufferResponse bufferResponse2 = createBufferResponse(
			TestBufferFactory.createBuffer(32), 0, inputChannel2.getInputChannelId(), 1);
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse1);
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse2);

		assertEquals(2, inputChannel1.getUnannouncedCredit());
		assertEquals(2, inputChannel2.getUnannouncedCredit());

		channel.runPendingTasks();

		// The two input channels should notify credits availability via the writable channel
		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(AddCredit.class));
		assertEquals(inputChannel1.getInputChannelId(), ((AddCredit) readFromOutbound).receiverId);
		assertEquals(2, ((AddCredit) readFromOutbound).credit);

		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(AddCredit.class));
		assertEquals(inputChannel2.getInputChannelId(), ((AddCredit) readFromOutbound).receiverId);
		assertEquals(2, ((AddCredit) readFromOutbound).credit);
		assertNull(channel.readOutbound());

		ByteBuf channelBlockingBuffer = blockChannel(channel);

		// Trigger notify credits availability via buffer response on the condition of an un-writable channel
		final BufferResponse bufferResponse3 = createBufferResponse(
			TestBufferFactory.createBuffer(32), 1, inputChannel1.getInputChannelId(), 1);
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse3);

		assertEquals(1, inputChannel1.getUnannouncedCredit());
		assertEquals(0, inputChannel2.getUnannouncedCredit());

		channel.runPendingTasks();

		// The input channel will not notify credits via un-writable channel
		assertFalse(channel.isWritable());
		assertNull(channel.readOutbound());

		// Flush the buffer to make the channel writable again
		channel.flush();
		assertSame(channelBlockingBuffer, channel.readOutbound());

		// The input channel should notify credits via channel's writability changed event
		assertTrue(channel.isWritable());
		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(AddCredit.class));
		assertEquals(1, ((AddCredit) readFromOutbound).credit);
		assertEquals(0, inputChannel1.getUnannouncedCredit());
		assertEquals(0, inputChannel2.getUnannouncedCredit());

		// no more messages
		assertNull(channel.readOutbound());
	} finally {
		// Release all the buffer resources
		inputGate.releaseAllResources();

		networkBufferPool.destroyAllBufferPools();
		networkBufferPool.destroy();
	}
}
 
Example #8
Source File: CreditBasedPartitionRequestClientHandlerTest.java    From Flink-CEPplus with Apache License 2.0 4 votes vote down vote up
/**
 * Verifies that {@link RemoteInputChannel} is enqueued in the pipeline, but {@link AddCredit}
 * message is not sent actually when this input channel is released.
 */
@Test
public void testNotifyCreditAvailableAfterReleased() throws Exception {
	final CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = new PartitionRequestClient(
		channel, handler, mock(ConnectionID.class), mock(PartitionRequestClientFactory.class));

	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32);
	final SingleInputGate inputGate = createSingleInputGate();
	final RemoteInputChannel inputChannel = createRemoteInputChannel(inputGate, client);
	try {
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		final int numExclusiveBuffers = 2;
		inputGate.assignExclusiveSegments(networkBufferPool, numExclusiveBuffers);

		inputChannel.requestSubpartition(0);

		// This should send the partition request
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(2, ((PartitionRequest) readFromOutbound).credit);

		// Trigger request floating buffers via buffer response to notify credits available
		final BufferResponse bufferResponse = createBufferResponse(
			TestBufferFactory.createBuffer(32), 0, inputChannel.getInputChannelId(), 1);
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse);

		assertEquals(2, inputChannel.getUnannouncedCredit());

		// Release the input channel
		inputGate.releaseAllResources();

		// it should send a close request after releasing the input channel,
		// but will not notify credits for a released input channel.
		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(CloseRequest.class));

		channel.runPendingTasks();

		assertNull(channel.readOutbound());
	} finally {
		// Release all the buffer resources
		inputGate.releaseAllResources();

		networkBufferPool.destroyAllBufferPools();
		networkBufferPool.destroy();
	}
}
 
Example #9
Source File: CreditBasedPartitionRequestClientHandlerTest.java    From flink with Apache License 2.0 4 votes vote down vote up
/**
 * Verifies that {@link RemoteInputChannel} is enqueued in the pipeline for notifying credits,
 * and verifies the behaviour of credit notification by triggering channel's writability changed.
 */
@Test
public void testNotifyCreditAvailable() throws Exception {
	final CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = new NettyPartitionRequestClient(
		channel, handler, mock(ConnectionID.class), mock(PartitionRequestClientFactory.class));

	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32, 2);
	final SingleInputGate inputGate = createSingleInputGate(1);
	final RemoteInputChannel inputChannel1 = createRemoteInputChannel(inputGate, client, networkBufferPool);
	final RemoteInputChannel inputChannel2 = createRemoteInputChannel(inputGate, client, networkBufferPool);
	try {
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		inputGate.assignExclusiveSegments();

		inputChannel1.requestSubpartition(0);
		inputChannel2.requestSubpartition(0);

		// The two input channels should send partition requests
		assertTrue(channel.isWritable());
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(inputChannel1.getInputChannelId(), ((PartitionRequest) readFromOutbound).receiverId);
		assertEquals(2, ((PartitionRequest) readFromOutbound).credit);

		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(inputChannel2.getInputChannelId(), ((PartitionRequest) readFromOutbound).receiverId);
		assertEquals(2, ((PartitionRequest) readFromOutbound).credit);

		// The buffer response will take one available buffer from input channel, and it will trigger
		// requesting (backlog + numExclusiveBuffers - numAvailableBuffers) floating buffers
		final BufferResponse bufferResponse1 = createBufferResponse(
			TestBufferFactory.createBuffer(32), 0, inputChannel1.getInputChannelId(), 1);
		final BufferResponse bufferResponse2 = createBufferResponse(
			TestBufferFactory.createBuffer(32), 0, inputChannel2.getInputChannelId(), 1);
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse1);
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse2);

		assertEquals(2, inputChannel1.getUnannouncedCredit());
		assertEquals(2, inputChannel2.getUnannouncedCredit());

		channel.runPendingTasks();

		// The two input channels should notify credits availability via the writable channel
		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(AddCredit.class));
		assertEquals(inputChannel1.getInputChannelId(), ((AddCredit) readFromOutbound).receiverId);
		assertEquals(2, ((AddCredit) readFromOutbound).credit);

		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(AddCredit.class));
		assertEquals(inputChannel2.getInputChannelId(), ((AddCredit) readFromOutbound).receiverId);
		assertEquals(2, ((AddCredit) readFromOutbound).credit);
		assertNull(channel.readOutbound());

		ByteBuf channelBlockingBuffer = blockChannel(channel);

		// Trigger notify credits availability via buffer response on the condition of an un-writable channel
		final BufferResponse bufferResponse3 = createBufferResponse(
			TestBufferFactory.createBuffer(32), 1, inputChannel1.getInputChannelId(), 1);
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse3);

		assertEquals(1, inputChannel1.getUnannouncedCredit());
		assertEquals(0, inputChannel2.getUnannouncedCredit());

		channel.runPendingTasks();

		// The input channel will not notify credits via un-writable channel
		assertFalse(channel.isWritable());
		assertNull(channel.readOutbound());

		// Flush the buffer to make the channel writable again
		channel.flush();
		assertSame(channelBlockingBuffer, channel.readOutbound());

		// The input channel should notify credits via channel's writability changed event
		assertTrue(channel.isWritable());
		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(AddCredit.class));
		assertEquals(1, ((AddCredit) readFromOutbound).credit);
		assertEquals(0, inputChannel1.getUnannouncedCredit());
		assertEquals(0, inputChannel2.getUnannouncedCredit());

		// no more messages
		assertNull(channel.readOutbound());
	} finally {
		// Release all the buffer resources
		inputGate.close();

		networkBufferPool.destroyAllBufferPools();
		networkBufferPool.destroy();
	}
}
 
Example #10
Source File: CreditBasedPartitionRequestClientHandlerTest.java    From flink with Apache License 2.0 4 votes vote down vote up
/**
 * Verifies that {@link RemoteInputChannel} is enqueued in the pipeline, but {@link AddCredit}
 * message is not sent actually when this input channel is released.
 */
@Test
public void testNotifyCreditAvailableAfterReleased() throws Exception {
	final CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = new NettyPartitionRequestClient(
		channel, handler, mock(ConnectionID.class), mock(PartitionRequestClientFactory.class));

	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32, 2);
	final SingleInputGate inputGate = createSingleInputGate(1);
	final RemoteInputChannel inputChannel = createRemoteInputChannel(inputGate, client, networkBufferPool);
	try {
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		inputGate.assignExclusiveSegments();

		inputChannel.requestSubpartition(0);

		// This should send the partition request
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(2, ((PartitionRequest) readFromOutbound).credit);

		// Trigger request floating buffers via buffer response to notify credits available
		final BufferResponse bufferResponse = createBufferResponse(
			TestBufferFactory.createBuffer(32), 0, inputChannel.getInputChannelId(), 1);
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse);

		assertEquals(2, inputChannel.getUnannouncedCredit());

		// Release the input channel
		inputGate.close();

		// it should send a close request after releasing the input channel,
		// but will not notify credits for a released input channel.
		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(CloseRequest.class));

		channel.runPendingTasks();

		assertNull(channel.readOutbound());
	} finally {
		// Release all the buffer resources
		inputGate.close();

		networkBufferPool.destroyAllBufferPools();
		networkBufferPool.destroy();
	}
}
 
Example #11
Source File: CreditBasedPartitionRequestClientHandlerTest.java    From flink with Apache License 2.0 4 votes vote down vote up
/**
 * Verifies that {@link RemoteInputChannel} is enqueued in the pipeline, but {@link AddCredit}
 * message is not sent actually when this input channel is released.
 */
@Test
public void testNotifyCreditAvailableAfterReleased() throws Exception {
	final CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler();
	final EmbeddedChannel channel = new EmbeddedChannel(handler);
	final PartitionRequestClient client = new NettyPartitionRequestClient(
		channel, handler, mock(ConnectionID.class), mock(PartitionRequestClientFactory.class));

	final NetworkBufferPool networkBufferPool = new NetworkBufferPool(10, 32, 2);
	final SingleInputGate inputGate = createSingleInputGate(1, networkBufferPool);
	final RemoteInputChannel inputChannel = createRemoteInputChannel(inputGate, client);
	try {
		inputGate.setInputChannels(inputChannel);
		final BufferPool bufferPool = networkBufferPool.createBufferPool(6, 6);
		inputGate.setBufferPool(bufferPool);
		inputGate.assignExclusiveSegments();

		inputChannel.requestSubpartition(0);

		// This should send the partition request
		Object readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(PartitionRequest.class));
		assertEquals(2, ((PartitionRequest) readFromOutbound).credit);

		// Trigger request floating buffers via buffer response to notify credits available
		final BufferResponse bufferResponse = createBufferResponse(
			TestBufferFactory.createBuffer(32),
			0,
			inputChannel.getInputChannelId(),
			1,
			new NetworkBufferAllocator(handler));
		handler.channelRead(mock(ChannelHandlerContext.class), bufferResponse);

		assertEquals(2, inputChannel.getUnannouncedCredit());

		// Release the input channel
		inputGate.close();

		// it should send a close request after releasing the input channel,
		// but will not notify credits for a released input channel.
		readFromOutbound = channel.readOutbound();
		assertThat(readFromOutbound, instanceOf(CloseRequest.class));

		channel.runPendingTasks();

		assertNull(channel.readOutbound());
	} finally {
		releaseResource(inputGate, networkBufferPool);
		channel.close();
	}
}