gaoyunhaii commented on a change in pull request #7368: [FLINK-10742][network] Let Netty use Flink's buffers directly in credit-based mode URL: https://github.com/apache/flink/pull/7368#discussion_r388749965
########## File path: flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyMessageClientDecoderDelegateTest.java ########## @@ -0,0 +1,369 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.flink.runtime.io.network.netty; + +import org.apache.flink.core.memory.MemorySegment; +import org.apache.flink.core.memory.MemorySegmentFactory; +import org.apache.flink.runtime.io.network.buffer.Buffer; +import org.apache.flink.runtime.io.network.buffer.FreeingBufferRecycler; +import org.apache.flink.runtime.io.network.buffer.NetworkBuffer; +import org.apache.flink.runtime.io.network.partition.consumer.BufferProviderRemoteInputChannel; +import org.apache.flink.runtime.io.network.partition.consumer.InputChannelID; +import org.apache.flink.runtime.io.network.partition.consumer.RemoteInputChannel; +import org.apache.flink.runtime.io.network.partition.consumer.SingleInputGate; +import org.apache.flink.shaded.netty4.io.netty.buffer.ByteBuf; +import org.apache.flink.shaded.netty4.io.netty.channel.embedded.EmbeddedChannel; +import org.junit.Test; + +import java.util.ArrayList; +import java.util.List; + +import static junit.framework.TestCase.assertEquals; +import static junit.framework.TestCase.assertTrue; +import static org.apache.flink.runtime.io.network.netty.NettyMessage.BufferResponse; +import static org.apache.flink.runtime.io.network.netty.NettyMessage.ErrorResponse; +import static org.apache.flink.runtime.io.network.netty.NettyTestUtil.verifyBufferResponseHeader; +import static org.apache.flink.runtime.io.network.netty.NettyTestUtil.verifyErrorResponse; +import static org.apache.flink.runtime.io.network.partition.InputChannelTestUtils.createSingleInputGate; +import static org.junit.Assert.assertNull; +import static org.junit.Assert.fail; + +/** + * Tests the client side message decoder. + */ +public class NettyMessageClientDecoderDelegateTest { + + private static final int BUFFER_SIZE = 1024; + + private static final NettyBufferPool ALLOCATOR = new NettyBufferPool(1); + + /** + * Verifies that the client side decoder works well for unreleased input channels. + */ + @Test + public void testDownstreamMessageDecode() throws Exception { + int totalBufferRequired = 3; + + SingleInputGate inputGate = createSingleInputGate(1); + RemoteInputChannel normalInputChannel = new BufferProviderRemoteInputChannel(inputGate, totalBufferRequired, BUFFER_SIZE); + + CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler(); + handler.addInputChannel(normalInputChannel); + + EmbeddedChannel channel = new EmbeddedChannel(new NettyMessageClientDecoderDelegate(handler)); + + testRepartitionMessagesAndDecode( + channel, + false, + false, + false, + normalInputChannel.getInputChannelId(), + null); + } + + /** + * Verifies that the client side decoder works well for empty buffers. Empty buffers should not + * consume data buffers of the input channels. + */ + @Test + public void testDownstreamMessageDecodeWithEmptyBuffers() throws Exception { + int totalBufferRequired = 3; + + SingleInputGate inputGate = createSingleInputGate(1); + RemoteInputChannel normalInputChannel = new BufferProviderRemoteInputChannel(inputGate, totalBufferRequired, BUFFER_SIZE); + + CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler(); + handler.addInputChannel(normalInputChannel); + + EmbeddedChannel channel = new EmbeddedChannel(new NettyMessageClientDecoderDelegate(handler)); + + testRepartitionMessagesAndDecode( + channel, + true, + false, + false, + normalInputChannel.getInputChannelId(), + null); + } + + /** + * Verifies that NettyMessageDecoder works well with buffers sent to a released input channel. The data buffer + * part should be discarded before reading the next message. + */ + @Test + public void testDownstreamMessageDecodeWithReleasedInputChannel() throws Exception { + int totalBufferRequired = 3; + + SingleInputGate normalInputGate = createSingleInputGate(1); + RemoteInputChannel normalInputChannel = new BufferProviderRemoteInputChannel(normalInputGate, totalBufferRequired, BUFFER_SIZE); + + SingleInputGate releasedInputGate = createSingleInputGate(1); + RemoteInputChannel releasedInputChannel = new BufferProviderRemoteInputChannel(releasedInputGate, 0, BUFFER_SIZE); + releasedInputGate.close(); + + CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler(); + handler.addInputChannel(normalInputChannel); + handler.addInputChannel(releasedInputChannel); + + EmbeddedChannel channel = new EmbeddedChannel(new NettyMessageClientDecoderDelegate(handler)); + + testRepartitionMessagesAndDecode( + channel, + false, + true, + false, + normalInputChannel.getInputChannelId(), + releasedInputChannel.getInputChannelId()); + } + + /** + * Verifies that NettyMessageDecoder works well with buffers sent to a removed input channel. The data buffer + * part should be discarded before reading the next message. + */ + @Test + public void testDownstreamMessageDecodeWithRemovedInputChannel() throws Exception { + int totalBufferRequired = 3; + + SingleInputGate normalInputGate = createSingleInputGate(1); + RemoteInputChannel normalInputChannel = new BufferProviderRemoteInputChannel(normalInputGate, totalBufferRequired, BUFFER_SIZE); + + CreditBasedPartitionRequestClientHandler handler = new CreditBasedPartitionRequestClientHandler(); + handler.addInputChannel(normalInputChannel); + + EmbeddedChannel channel = new EmbeddedChannel(new NettyMessageClientDecoderDelegate(handler)); + + testRepartitionMessagesAndDecode( + channel, + false, + false, + true, + normalInputChannel.getInputChannelId(), + null); + } + + //------------------------------------------------------------------------------------------------------------------ + + private void testRepartitionMessagesAndDecode( + EmbeddedChannel channel, + boolean hasEmptyBuffer, + boolean hasBufferForReleasedChannel, + boolean hasBufferForRemovedChannel, + InputChannelID normalInputChannelId, + InputChannelID releasedInputChannelId) throws Exception { + + List<NettyMessage> messages = createMessageList( + hasEmptyBuffer, + hasBufferForReleasedChannel, + hasBufferForRemovedChannel, + normalInputChannelId, + releasedInputChannelId); + + ByteBuf[] serializedBuffers = null; + ByteBuf mergedBuffer = null; + + try { + serializedBuffers = serializeMessages(messages); + int[] sizes = getBufferSizes(serializedBuffers); + mergedBuffer = mergeBuffers(serializedBuffers); + + List<ByteBuf> partitionedBuffers = partitionBuffer(mergedBuffer, sizes); + List<NettyMessage> decodedMessages = decodedMessages(channel, partitionedBuffers); + + verifyDecodedMessages(messages, decodedMessages, normalInputChannelId); + } finally { + if (serializedBuffers != null) { + releaseBuffers(serializedBuffers); + } + + if (mergedBuffer != null) { + mergedBuffer.release(); + } + + channel.close(); + } + } + + private List<NettyMessage> createMessageList( + boolean hasEmptyBuffer, + boolean hasBufferForReleasedChannel, + boolean hasBufferForRemovedChannel, + InputChannelID normalInputChannelId, + InputChannelID releasedInputChannelId) { + + List<NettyMessage> messages = new ArrayList<>(); + + Buffer event = createDataBuffer(32); + event.tagAsEvent(); + + messages.add(new NettyMessage.BufferResponse(createDataBuffer(128), 0, normalInputChannelId, 4)); + messages.add(new NettyMessage.BufferResponse(createDataBuffer(256), 1, normalInputChannelId, 3)); + + if (hasEmptyBuffer) { + messages.add(new NettyMessage.BufferResponse(createDataBuffer(0), 1, normalInputChannelId, 2)); + } + + if (hasBufferForReleasedChannel) { + messages.add(new NettyMessage.BufferResponse(createDataBuffer(256), 1, releasedInputChannelId, 3)); + } + + if (hasBufferForRemovedChannel) { + messages.add(new NettyMessage.BufferResponse(createDataBuffer(256), 1, new InputChannelID(), 3)); + } + + messages.add(new NettyMessage.BufferResponse(event, 2, normalInputChannelId, 4)); + messages.add(new NettyMessage.ErrorResponse(new RuntimeException("test"), normalInputChannelId)); + messages.add(new NettyMessage.BufferResponse(createDataBuffer(56), 3, normalInputChannelId, 4)); + + return messages; + } + + private ByteBuf[] serializeMessages(List<NettyMessage> messages) throws Exception { + ByteBuf[] serializedBuffers = new ByteBuf[messages.size()]; + for (int i = 0; i < messages.size(); ++i) { + serializedBuffers[i] = messages.get(i).write(ALLOCATOR); + } + + return serializedBuffers; + } + + private int[] getBufferSizes(ByteBuf[] buffers) { + int[] sizes = new int[buffers.length]; + for (int i = 0; i < sizes.length; ++i) { + sizes[i] = buffers[i].readableBytes(); + } + + return sizes; + } + + private ByteBuf mergeBuffers(ByteBuf[] buffers) { + ByteBuf allData = ALLOCATOR.buffer(); + for (ByteBuf buffer : buffers) { + allData.writeBytes(buffer); + } + + return allData; + } + + private List<ByteBuf> partitionBuffer(ByteBuf buffer, int[] sizes) { + // For each group of three messages [A, B, C], we repartition them as three buffers: + // 1. First half of A. + // 2. Second half of A + B + first half of C. + // 3. Second half of C. + List<Integer> partitionPositions = new ArrayList<>(); + + int position = 0; + partitionPositions.add(position); + + for (int i = 0; i < sizes.length / 3 * 3; i += 3) { + position += sizes[i] / 2; + partitionPositions.add(position); + + position += (sizes[i] / 2 + sizes[i + 1] + sizes[i + 2] / 2); + partitionPositions.add(position); + + position += sizes[i + 2] / 2; + partitionPositions.add(position); + } + + // Partitions the remaining data into three parts averagely. + int remainingBytes = buffer.readableBytes() - position; + + position += (remainingBytes / 3); + partitionPositions.add(position); + + position += (remainingBytes / 3 * 2); + partitionPositions.add(position); + + partitionPositions.add(buffer.readableBytes()); + + // Partitions the buffers according to the selected partition positions. + List<ByteBuf> result = new ArrayList<>(); + for (int i = 1; i < partitionPositions.size(); ++i) { + ByteBuf partitionedBuffer = ALLOCATOR.buffer(); + partitionedBuffer.writeBytes( + buffer, + partitionPositions.get(i - 1), + partitionPositions.get(i) - partitionPositions.get(i - 1)); + result.add(partitionedBuffer); + } + + return result; + } + + private List<NettyMessage> decodedMessages(EmbeddedChannel channel, List<ByteBuf> inputBuffers) { + for (ByteBuf buffer : inputBuffers) { + channel.writeInbound(buffer); + } + + channel.runPendingTasks(); + + List<NettyMessage> decodedMessages = new ArrayList<>(); + Object input; + while ((input = channel.readInbound()) != null) { + assertTrue(input instanceof NettyMessage); + decodedMessages.add((NettyMessage) input); + } + + return decodedMessages; + } + + private void verifyDecodedMessages( + List<NettyMessage> expectedMessages, + List<NettyMessage> decodedMessages, + InputChannelID normalChannelId) { + + assertEquals(expectedMessages.size(), decodedMessages.size()); + for (int i = 0; i < expectedMessages.size(); ++i) { + assertEquals(expectedMessages.get(i).getClass(), decodedMessages.get(i).getClass()); + + if (expectedMessages.get(i) instanceof NettyMessage.BufferResponse) { + BufferResponse expected = (BufferResponse) expectedMessages.get(i); + BufferResponse actual = (BufferResponse) decodedMessages.get(i); + + verifyBufferResponseHeader(expected, actual); + if (expected.bufferSize == 0 || !expected.receiverId.equals(normalChannelId)) { Review comment: I think `releasedChannelId` is not required since we already compared expected receiver id with the actual receiver id, thus the actual receiver id should always be right. Then we could distinguish normal ones with other two ids. If we pass `releasedChannelId`, we would also have to pass `removedChannelId`. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
