szilard-nemeth commented on a change in pull request #3259: URL: https://github.com/apache/hadoop/pull/3259#discussion_r684227941
########## File path: hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/test/java/org/apache/hadoop/mapred/TestShuffleHandler.java ########## @@ -106,10 +129,584 @@ LoggerFactory.getLogger(TestShuffleHandler.class); private static final File ABS_LOG_DIR = GenericTestUtils.getTestDir( TestShuffleHandler.class.getSimpleName() + "LocDir"); + private static final long ATTEMPT_ID = 12345L; + private static final long ATTEMPT_ID_2 = 12346L; + + + //Control test execution properties with these flags + private static final boolean DEBUG_MODE = false; + //WARNING: If this is set to true and proxy server is not running, tests will fail! + private static final boolean USE_PROXY = false; + private static final int HEADER_WRITE_COUNT = 100000; + private static TestExecution TEST_EXECUTION; + + private static class TestExecution { + private static final int DEFAULT_KEEP_ALIVE_TIMEOUT = -100; + private static final int DEBUG_FRIENDLY_KEEP_ALIVE = 1000; + private static final int DEFAULT_PORT = 0; //random port + private static final int FIXED_PORT = 8088; + private static final String PROXY_HOST = "127.0.0.1"; + private static final int PROXY_PORT = 8888; + private final boolean debugMode; + private final boolean useProxy; + + public TestExecution(boolean debugMode, boolean useProxy) { + this.debugMode = debugMode; + this.useProxy = useProxy; + } + + int getKeepAliveTimeout() { + if (debugMode) { + return DEBUG_FRIENDLY_KEEP_ALIVE; + } + return DEFAULT_KEEP_ALIVE_TIMEOUT; + } + + HttpURLConnection openConnection(URL url) throws IOException { + HttpURLConnection conn; + if (useProxy) { + Proxy proxy + = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(PROXY_HOST, PROXY_PORT)); + conn = (HttpURLConnection) url.openConnection(proxy); + } else { + conn = (HttpURLConnection) url.openConnection(); + } + return conn; + } + + int shuffleHandlerPort() { + if (debugMode) { + return FIXED_PORT; + } else { + return DEFAULT_PORT; + } + } + + void parameterizeConnection(URLConnection conn) { + if (DEBUG_MODE) { + conn.setReadTimeout(1000000); + conn.setConnectTimeout(1000000); + } + } + } + + private static class ResponseConfig { + private static final int ONE_HEADER_DISPLACEMENT = 1; + + private final int headerWriteCount; + private final long actualHeaderWriteCount; + private final int mapOutputCount; + private final int contentLengthOfOneMapOutput; + private long headerSize; + public long contentLengthOfResponse; + + public ResponseConfig(int headerWriteCount, int mapOutputCount, int contentLengthOfOneMapOutput) { + if (mapOutputCount <= 0 && contentLengthOfOneMapOutput > 0) { + throw new IllegalStateException("mapOutputCount should be at least 1"); + } + this.headerWriteCount = headerWriteCount; + this.mapOutputCount = mapOutputCount; + this.contentLengthOfOneMapOutput = contentLengthOfOneMapOutput; + //MapOutputSender#send will send header N + 1 times + //So, (N + 1) * headerSize should be the Content-length header + the expected Content-length as well + this.actualHeaderWriteCount = headerWriteCount + ONE_HEADER_DISPLACEMENT; + } + + private void setHeaderSize(long headerSize) { + this.headerSize = headerSize; + long contentLengthOfAllHeaders = actualHeaderWriteCount * headerSize; + this.contentLengthOfResponse = computeContentLengthOfResponse(contentLengthOfAllHeaders); + LOG.debug("Content-length of all headers: {}", contentLengthOfAllHeaders); + LOG.debug("Content-length of one MapOutput: {}", contentLengthOfOneMapOutput); + LOG.debug("Content-length of final HTTP response: {}", contentLengthOfResponse); + } + + private long computeContentLengthOfResponse(long contentLengthOfAllHeaders) { + int mapOutputCountMultiplier = mapOutputCount; + if (mapOutputCount == 0) { + mapOutputCountMultiplier = 1; + } + return (contentLengthOfAllHeaders + contentLengthOfOneMapOutput) * mapOutputCountMultiplier; + } + } + + private enum ShuffleUrlType { + SIMPLE, WITH_KEEPALIVE, WITH_KEEPALIVE_MULTIPLE_MAP_IDS, WITH_KEEPALIVE_NO_MAP_IDS + } + + private static class InputStreamReadResult { + final String asString; + int totalBytesRead; + + public InputStreamReadResult(byte[] bytes, int totalBytesRead) { + this.asString = new String(bytes, StandardCharsets.UTF_8); + this.totalBytesRead = totalBytesRead; + } + } + + private static abstract class AdditionalMapOutputSenderOperations { + public abstract ChannelFuture perform(ChannelHandlerContext ctx, Channel ch) throws IOException; + } + + private class ShuffleHandlerForKeepAliveTests extends ShuffleHandler { + final LastSocketAddress lastSocketAddress = new LastSocketAddress(); + final ArrayList<Throwable> failures = new ArrayList<>(); + final ShuffleHeaderProvider shuffleHeaderProvider; + final HeaderPopulator headerPopulator; + MapOutputSender mapOutputSender; + private Consumer<IdleStateEvent> channelIdleCallback; + private CustomTimeoutHandler customTimeoutHandler; + private boolean failImmediatelyOnErrors = false; + private boolean closeChannelOnError = true; + private ResponseConfig responseConfig; + + public ShuffleHandlerForKeepAliveTests(long attemptId, ResponseConfig responseConfig, + Consumer<IdleStateEvent> channelIdleCallback) throws IOException { + this(attemptId, responseConfig); + this.channelIdleCallback = channelIdleCallback; + } + + public ShuffleHandlerForKeepAliveTests(long attemptId, ResponseConfig responseConfig) throws IOException { + this.responseConfig = responseConfig; + this.shuffleHeaderProvider = new ShuffleHeaderProvider(attemptId); + this.responseConfig.setHeaderSize(shuffleHeaderProvider.getShuffleHeaderSize()); + this.headerPopulator = new HeaderPopulator(this, responseConfig, shuffleHeaderProvider, true); + this.mapOutputSender = new MapOutputSender(responseConfig, lastSocketAddress, shuffleHeaderProvider); + setUseOutboundExceptionHandler(true); + } + + public void setFailImmediatelyOnErrors(boolean failImmediatelyOnErrors) { + this.failImmediatelyOnErrors = failImmediatelyOnErrors; + } + + public void setCloseChannelOnError(boolean closeChannelOnError) { + this.closeChannelOnError = closeChannelOnError; + } + + @Override + protected Shuffle getShuffle(final Configuration conf) { + // replace the shuffle handler with one stubbed for testing + return new Shuffle(conf) { + @Override + protected MapOutputInfo getMapOutputInfo(String mapId, int reduce, + String jobId, String user) throws IOException { + return null; + } + @Override + protected void verifyRequest(String appid, ChannelHandlerContext ctx, + HttpRequest request, HttpResponse response, URL requestUri) + throws IOException { + } + + @Override + protected void populateHeaders(List<String> mapIds, String jobId, + String user, int reduce, HttpRequest request, + HttpResponse response, boolean keepAliveParam, + Map<String, MapOutputInfo> infoMap) throws IOException { + long contentLength = headerPopulator.populateHeaders( + keepAliveParam); + super.setResponseHeaders(response, keepAliveParam, contentLength); + } + + @Override + protected ChannelFuture sendMapOutput(ChannelHandlerContext ctx, + Channel ch, String user, String mapId, int reduce, + MapOutputInfo info) throws IOException { + return mapOutputSender.send(ctx, ch); + } + + @Override + public void channelActive(ChannelHandlerContext ctx) throws Exception { + ctx.pipeline().replace(HttpResponseEncoder.class, ENCODER_HANDLER_NAME, new LoggingHttpResponseEncoder(false)); + replaceTimeoutHandlerWithCustom(ctx); + LOG.debug("Modified pipeline: {}", ctx.pipeline()); + super.channelActive(ctx); + } + + private void replaceTimeoutHandlerWithCustom(ChannelHandlerContext ctx) { + TimeoutHandler oldTimeoutHandler = + (TimeoutHandler)ctx.pipeline().get(TIMEOUT_HANDLER); + int timeoutValue = + oldTimeoutHandler.getConnectionKeepAliveTimeOut(); + customTimeoutHandler = new CustomTimeoutHandler(timeoutValue, channelIdleCallback); + ctx.pipeline().replace(TIMEOUT_HANDLER, TIMEOUT_HANDLER, customTimeoutHandler); + } + + @Override + protected void sendError(ChannelHandlerContext ctx, + HttpResponseStatus status) { + String message = "Error while processing request. Status: " + status; + handleError(ctx, message); + if (failImmediatelyOnErrors) { + stop(); + } + } + + @Override + protected void sendError(ChannelHandlerContext ctx, String message, + HttpResponseStatus status) { + String errMessage = String.format("Error while processing request. " + + "Status: " + + "%s, message: %s", status, message); + handleError(ctx, errMessage); + if (failImmediatelyOnErrors) { + stop(); + } + } + }; + } + + private void handleError(ChannelHandlerContext ctx, String message) { + LOG.error(message); + failures.add(new Error(message)); + if (closeChannelOnError) { + LOG.warn("sendError: Closing channel"); + ctx.channel().close(); + } + } + + private class CustomTimeoutHandler extends TimeoutHandler { + private boolean channelIdle = false; + private final Consumer<IdleStateEvent> channelIdleCallback; + + public CustomTimeoutHandler(int connectionKeepAliveTimeOut, + Consumer<IdleStateEvent> channelIdleCallback) { + super(connectionKeepAliveTimeOut); + this.channelIdleCallback = channelIdleCallback; + } + + @Override + public void channelIdle(ChannelHandlerContext ctx, IdleStateEvent e) { + LOG.debug("Channel idle"); + this.channelIdle = true; + if (channelIdleCallback != null) { + LOG.debug("Calling channel idle callback.."); + channelIdleCallback.accept(e); + } + super.channelIdle(ctx, e); + } + } + } + + private static class MapOutputSender { + private final ResponseConfig responseConfig; + private final LastSocketAddress lastSocketAddress; + private final ShuffleHeaderProvider shuffleHeaderProvider; + private AdditionalMapOutputSenderOperations additionalMapOutputSenderOperations; + + public MapOutputSender(ResponseConfig responseConfig, LastSocketAddress lastSocketAddress, + ShuffleHeaderProvider shuffleHeaderProvider) { + this.responseConfig = responseConfig; + this.lastSocketAddress = lastSocketAddress; + this.shuffleHeaderProvider = shuffleHeaderProvider; + } + + public ChannelFuture send(ChannelHandlerContext ctx, Channel ch) throws IOException { + LOG.debug("In MapOutputSender#send"); + lastSocketAddress.setAddress(ch.remoteAddress()); + ShuffleHeader header = shuffleHeaderProvider.createNewShuffleHeader(); + writeOneHeader(ch, header); + ChannelFuture future = writeHeaderNTimes(ch, header, responseConfig.headerWriteCount); + // This is the last operation + // It's safe to increment ShuffleHeader counter for better identification + shuffleHeaderProvider.incrementCounter(); + if (additionalMapOutputSenderOperations != null) { + return additionalMapOutputSenderOperations.perform(ctx, ch); + } + return future; + } + private void writeOneHeader(Channel ch, ShuffleHeader header) throws IOException { + DataOutputBuffer dob = new DataOutputBuffer(); + header.write(dob); + LOG.debug("MapOutputSender#writeOneHeader before WriteAndFlush #1"); + ch.writeAndFlush(wrappedBuffer(dob.getData(), 0, dob.getLength())); + LOG.debug("MapOutputSender#writeOneHeader after WriteAndFlush #1. outputBufferSize: " + dob.size()); + } + + private ChannelFuture writeHeaderNTimes(Channel ch, ShuffleHeader header, int iterations) throws IOException { + DataOutputBuffer dob = new DataOutputBuffer(); + for (int i = 0; i < iterations; ++i) { + header.write(dob); + } + LOG.debug("MapOutputSender#writeHeaderNTimes WriteAndFlush big chunk of data, outputBufferSize: " + dob.size()); + return ch.writeAndFlush(wrappedBuffer(dob.getData(), 0, dob.getLength())); + } + } + + private static class ShuffleHeaderProvider { + private final long attemptId; + private final AtomicInteger attemptCounter; + private int cachedSize = Integer.MIN_VALUE; + + public ShuffleHeaderProvider(long attemptId) { + this.attemptId = attemptId; + this.attemptCounter = new AtomicInteger(); + } + + ShuffleHeader createNewShuffleHeader() { + return new ShuffleHeader(String.format("attempt_%s_1_m_1_0%s", attemptId, + attemptCounter.get()), 5678, 5678, 1); + } + + void incrementCounter() { + attemptCounter.incrementAndGet(); + } Review comment: Discussed this offline, AtomicInteger was not required at all so using a regular int from now. -- This is an automated message from the Apache Git Service. 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