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_r386164335
########## File path: flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyMessageClientDecoderDelegateTest.java ########## @@ -0,0 +1,411 @@ +/* + * 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.PartitionRequestClient; +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.buffer.NetworkBufferPool; +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.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.function.Function; +import java.util.function.Supplier; + +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.partition.InputChannelTestUtils.createRemoteInputChannel; +import static org.apache.flink.runtime.io.network.partition.InputChannelTestUtils.createSingleInputGate; +import static org.junit.Assert.assertNull; +import static org.junit.Assert.fail; +import static org.mockito.Mockito.mock; + +/** + * Tests the client side message decoder. + */ +public class NettyMessageClientDecoderDelegateTest { + 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 { + // 6 buffers required for running 2 rounds and 3 buffers each round. + NettyChannelAndInputChannelIds context = createPartitionRequestClientHandler(6); + + Supplier<NettyMessage[]> messagesSupplier = () -> { + Buffer event = createDataBuffer(32); + event.tagAsEvent(); + + return new NettyMessage[]{ + new NettyMessage.BufferResponse(createDataBuffer(128), 0, context.getNormalChannelId(), 4), + new NettyMessage.BufferResponse(createDataBuffer(256), 1, context.getNormalChannelId(), 3), + new NettyMessage.BufferResponse(event, 2, context.getNormalChannelId(), 4), + new NettyMessage.ErrorResponse(new RuntimeException("test"), context.getNormalChannelId()), + new NettyMessage.BufferResponse(createDataBuffer(56), 3, context.getNormalChannelId(), 4) + }; + }; + + repartitionMessagesAndVerifyDecoding( + context, + messagesSupplier, + (int[] sizes) -> new int[]{ + sizes[0] / 3, + sizes[0] + sizes[1] + sizes[2] / 3, + sizes[0] + sizes[1] + sizes[2] + sizes[3] / 3 * 2, + sizes[0] + sizes[1] + sizes[2] + sizes[3] + sizes[4] / 3 * 2 + }); + + repartitionMessagesAndVerifyDecoding( + context, + messagesSupplier, + (int[] sizes) -> new int[]{ + sizes[0] / 3, + sizes[0] + sizes[1] / 3, + sizes[0] + sizes[1] + sizes[2] / 3, + sizes[0] + sizes[1] + sizes[2] + sizes[3], + sizes[0] + sizes[1] + sizes[2] + sizes[3] + sizes[4] / 3 * 2 + }); + } + + /** + * 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 { + // 4 buffers required for running 2 rounds and 2 buffers each round. + NettyChannelAndInputChannelIds context = createPartitionRequestClientHandler(4); + + Supplier<NettyMessage[]> messagesSupplier = () -> { + Buffer event = createDataBuffer(32); + event.tagAsEvent(); + + return new NettyMessage[]{ + new NettyMessage.BufferResponse(createDataBuffer(128), 0, context.getNormalChannelId(), 4), + new NettyMessage.BufferResponse(createDataBuffer(0), 1, context.getNormalChannelId(), 3), + new NettyMessage.BufferResponse(event, 2, context.getNormalChannelId(), 4), + new NettyMessage.ErrorResponse(new RuntimeException("test"), context.getNormalChannelId()), + new NettyMessage.BufferResponse(createDataBuffer(56), 3, context.getNormalChannelId(), 4) + }; + }; + + repartitionMessagesAndVerifyDecoding( + context, + messagesSupplier, + (int[] sizes) -> new int[]{ + sizes[0] / 3, + sizes[0] + sizes[1] + sizes[2] / 3 * 2, + sizes[0] + sizes[1] + sizes[2] + sizes[3] / 3, + sizes[0] + sizes[1] + sizes[2] + sizes[3] + sizes[4] + }); + + repartitionMessagesAndVerifyDecoding( + context, + messagesSupplier, + (int[] sizes) -> new int[]{ + sizes[0] / 3, + sizes[0] + sizes[1] / 3, + sizes[0] + sizes[1] + sizes[2] / 3, + sizes[0] + sizes[1] + sizes[2] + sizes[3], + sizes[0] + sizes[1] + sizes[2] + sizes[3] + sizes[4] / 3 * 2 + }); + } + + /** + * Verifies that NettyMessageDecoder works well with buffers sent to a released and removed input channels. + * For such channels, no Buffer is available to receive the data buffer in the message, and the data buffer + * part should be discarded before reading the next message. + */ + @Test + public void testDownstreamMessageDecodeWithReleasedAndRemovedInputChannel() throws Exception { + // 6 buffers required for running 2 rounds and 3 buffers each round. + NettyChannelAndInputChannelIds context = createPartitionRequestClientHandler(6); + + Supplier<NettyMessage[]> messagesSupplier = () -> { + Buffer event = createDataBuffer(32); + event.tagAsEvent(); + + Buffer event2 = createDataBuffer(128); + event.tagAsEvent(); + + return new NettyMessage[]{ + new NettyMessage.BufferResponse(createDataBuffer(128), 0, context.getNormalChannelId(), 4), + new NettyMessage.BufferResponse(createDataBuffer(256), 1, context.getReleasedChannelId(), 3), + new NettyMessage.BufferResponse(event, 2, context.getNormalChannelId(), 4), + new NettyMessage.BufferResponse(createDataBuffer(256), 1, context.getRemovedChannelId(), 3), + new NettyMessage.ErrorResponse(new RuntimeException("test"), context.getReleasedChannelId()), + new NettyMessage.BufferResponse(event2, 2, context.getNormalChannelId(), 4), + new NettyMessage.ErrorResponse(new RuntimeException("test"), context.getRemovedChannelId()), + new NettyMessage.BufferResponse(createDataBuffer(64), 3, context.getNormalChannelId(), 4), + }; + }; + + repartitionMessagesAndVerifyDecoding( + context, + messagesSupplier, + (int[] sizes) -> new int[]{ + sizes[0] / 3, + sizes[0] + sizes[1] / 3, + sizes[0] + sizes[1] + sizes[2] / 3, + sizes[0] + sizes[1] + sizes[2], + sizes[0] + sizes[1] + sizes[2] + sizes[3], + sizes[0] + sizes[1] + sizes[2] + sizes[3] + sizes[4] / 3 * 2, + sizes[0] + sizes[1] + sizes[2] + sizes[3] + sizes[4] + sizes[5] + sizes[6] / 2 + }); + + repartitionMessagesAndVerifyDecoding( + context, + messagesSupplier, + (int[] sizes) -> new int[]{ + sizes[0] / 3, + sizes[0], + sizes[0] + sizes[1] / 3, + sizes[0] + sizes[1] / 3 * 2, + sizes[0] + sizes[1] + sizes[2] / 3, + sizes[0] + sizes[1] + sizes[2] + sizes[3] + sizes[4] / 3, + sizes[0] + sizes[1] + sizes[2] + sizes[3] + sizes[4] + sizes[5] + sizes[6] + }); + } + + //------------------------------------------------------------------------------------------------------------------ + + private void repartitionMessagesAndVerifyDecoding( + NettyChannelAndInputChannelIds context, + Supplier<NettyMessage[]> messagesSupplier, + Function<int[], int[]> rePartitioner) throws Exception { + + NettyMessage[] messages = messagesSupplier.get(); + + ByteBuf[] serializedBuffers = null; + ByteBuf mergedBuffer = null; + + try { + serializedBuffers = serializeMessages(messages); + int[] sizes = getBufferSizes(serializedBuffers); + mergedBuffer = mergeBuffers(serializedBuffers); + + ByteBuf[] partitionedBuffers = partitionBuffer(mergedBuffer, rePartitioner.apply(sizes)); + List<NettyMessage> decodedMessages = decodedMessages(context, partitionedBuffers); + + verifyDecodedMessages(context, messages, decodedMessages); + } finally { + if (serializedBuffers != null) { + releaseBuffers(serializedBuffers); + } + + if (mergedBuffer != null) { + mergedBuffer.release(); + } + } + } + + private ByteBuf[] serializeMessages(NettyMessage[] messages) throws Exception { + ByteBuf[] serializedBuffers = new ByteBuf[messages.length]; + for (int i = 0; i < messages.length; ++i) { + serializedBuffers[i] = messages[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 ByteBuf[] partitionBuffer(ByteBuf buffer, int[] partitionPositions) { + ByteBuf[] result = new ByteBuf[partitionPositions.length + 1]; + for (int i = 0; i < result.length; ++i) { + int startPos = (i == 0 ? 0 : partitionPositions[i - 1]); + int endPos = (i < partitionPositions.length ? partitionPositions[i] : buffer.readableBytes()); + + result[i] = ALLOCATOR.buffer(); + result[i].writeBytes(buffer, startPos, endPos - startPos); + } + + return result; + } + + private List<NettyMessage> decodedMessages(NettyChannelAndInputChannelIds context, ByteBuf[] inputBuffers) { + EmbeddedChannel channel = context.getChannel(); + + 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(NettyChannelAndInputChannelIds context, NettyMessage[] expected, List<NettyMessage> decodedMessages) { + assertEquals(expected.length, decodedMessages.size()); + for (int i = 0; i < expected.length; ++i) { + assertEquals(expected[i].getClass(), decodedMessages.get(i).getClass()); + + if (expected[i] instanceof NettyMessage.BufferResponse) { + BufferResponse expectedBufferResponse = (BufferResponse) expected[i]; + BufferResponse decodedBufferResponse = (BufferResponse) decodedMessages.get(i); + + assertEquals(expectedBufferResponse.backlog, decodedBufferResponse.backlog); + assertEquals(expectedBufferResponse.sequenceNumber, decodedBufferResponse.sequenceNumber); + assertEquals(expectedBufferResponse.bufferSize, decodedBufferResponse.bufferSize); + assertEquals(expectedBufferResponse.receiverId, decodedBufferResponse.receiverId); + + if (expectedBufferResponse.bufferSize == 0 || + expectedBufferResponse.receiverId.equals(context.getReleasedChannelId()) || + expectedBufferResponse.receiverId.equals(context.getRemovedChannelId())) { + + assertNull(decodedBufferResponse.getBuffer()); + } else if (expectedBufferResponse.receiverId.equals(context.getNormalChannelId())) { + assertEquals(expectedBufferResponse.getBuffer(), decodedBufferResponse.getBuffer()); + } else { + fail("The decoded buffer response was sent to unknown input channel."); + } + } else if (expected[i] instanceof NettyMessage.ErrorResponse) { + ErrorResponse expectedErrorResponse = (ErrorResponse) expected[i]; + ErrorResponse decodedErrorResponse = (ErrorResponse) decodedMessages.get(i); + + assertEquals(expectedErrorResponse.receiverId, decodedErrorResponse.receiverId); + assertEquals(expectedErrorResponse.cause.getClass(), decodedErrorResponse.cause.getClass()); + assertEquals(expectedErrorResponse.cause.getMessage(), decodedErrorResponse.cause.getMessage()); + } else { + fail("Unsupported message type"); + } + } + } + + private void releaseBuffers(ByteBuf[] buffers) { + for (ByteBuf buffer : buffers) { + buffer.release(); + } + } + + private Buffer createDataBuffer(int size) { + MemorySegment segment = MemorySegmentFactory.allocateUnpooledSegment(size); + NetworkBuffer buffer = new NetworkBuffer(segment, FreeingBufferRecycler.INSTANCE); + for (int i = 0; i < size / 4; ++i) { + buffer.writeInt(i); + } + + return buffer; + } + + private NettyChannelAndInputChannelIds createPartitionRequestClientHandler(int numberOfBuffersInNormalChannel) throws IOException, InterruptedException { + NetworkBufferPool networkBufferPool = new NetworkBufferPool( Review comment: Change input channel into specialized implementation, thus the problem does not exist. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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