mukund-thakur commented on a change in pull request #2056: URL: https://github.com/apache/hadoop/pull/2056#discussion_r440013198
########## File path: hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/ITestAbfsNetworkStatistics.java ########## @@ -0,0 +1,253 @@ +/** + * 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.hadoop.fs.azurebfs; + +import java.io.IOException; +import java.util.Map; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.junit.Test; + +import org.apache.hadoop.fs.FSDataInputStream; +import org.apache.hadoop.fs.FSDataOutputStream; +import org.apache.hadoop.io.IOUtils; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.fs.azurebfs.services.AbfsOutputStream; +import org.apache.hadoop.fs.azurebfs.services.AbfsRestOperation; + +public class ITestAbfsNetworkStatistics extends AbstractAbfsIntegrationTest { + + private static final Logger LOG = + LoggerFactory.getLogger(ITestAbfsNetworkStatistics.class); + private static final int LARGE_OPERATIONS = 10; + + public ITestAbfsNetworkStatistics() throws Exception { + } + + /** + * Testing connections_made, send_request and bytes_send statistics in + * {@link AbfsRestOperation}. + */ + @Test + public void testAbfsHttpSendStatistics() throws IOException { + describe("Test to check correct values of statistics after Abfs http send " + + "request is done."); + + AzureBlobFileSystem fs = getFileSystem(); + Map<String, Long> metricMap; + Path sendRequestPath = path(getMethodName()); + String testNetworkStatsString = "http_send"; + long connectionsMade, requestsSent, bytesSent; + + /* + * Creating AbfsOutputStream will result in 1 connection made and 1 send + * request. + */ + try (AbfsOutputStream out = createAbfsOutputStreamWithFlushEnabled(fs, + sendRequestPath)) { + out.write(testNetworkStatsString.getBytes()); + + /* + * Flushes all outstanding data (i.e. the current unfinished packet) + * from the client into the service on all DataNode replicas. + */ + out.hflush(); + + metricMap = fs.getInstrumentationMap(); + + /* + * Testing the network stats with 1 write operation. + * + * connections_made : 3(getFileSystem()) + 1(AbfsOutputStream) + 2(flush). + * + * send_requests : 1(getFileSystem()) + 1(AbfsOutputStream) + 2(flush). + * + * bytes_sent : bytes wrote in AbfsOutputStream. + */ + connectionsMade = assertAbfsStatistics(AbfsStatistic.CONNECTIONS_MADE, + 6, metricMap); + requestsSent = assertAbfsStatistics(AbfsStatistic.SEND_REQUESTS, 4, + metricMap); + bytesSent = assertAbfsStatistics(AbfsStatistic.BYTES_SENT, + testNetworkStatsString.getBytes().length, metricMap); + + } + + // To close the AbfsOutputStream 1 connection is made and 1 request is sent. + connectionsMade++; + requestsSent++; + + try (AbfsOutputStream out = createAbfsOutputStreamWithFlushEnabled(fs, + sendRequestPath)) { + + for (int i = 0; i < LARGE_OPERATIONS; i++) { + out.write(testNetworkStatsString.getBytes()); + + /* + * 1 flush call would create 2 connections and 2 send requests. + * when hflush() is called it will essentially trigger append() and + * flush() inside AbfsRestOperation. Both of which calls + * executeHttpOperation() method which creates a connection and sends + * requests. + */ + out.hflush(); + } + + metricMap = fs.getInstrumentationMap(); + + /* + * Testing the network stats with Large amount of bytes sent. + * + * connections made : connections_made(Last assertion) + 1 + * (AbfsOutputStream) + LARGE_OPERATIONS * 2(flush). + * + * send requests : requests_sent(Last assertion) + 1(AbfsOutputStream) + + * LARGE_OPERATIONS * 2(flush). + * + * bytes sent : bytes_sent(Last assertion) + LARGE_OPERATIONS * (bytes + * wrote each time). + * + */ + assertAbfsStatistics(AbfsStatistic.CONNECTIONS_MADE, + connectionsMade + 1 + LARGE_OPERATIONS * 2, metricMap); + assertAbfsStatistics(AbfsStatistic.SEND_REQUESTS, + requestsSent + 1 + LARGE_OPERATIONS * 2, metricMap); + assertAbfsStatistics(AbfsStatistic.BYTES_SENT, + bytesSent + LARGE_OPERATIONS * (testNetworkStatsString.getBytes().length), + metricMap); + + } + + } + + /** + * Testing get_response and bytes_received in {@link AbfsRestOperation}. + */ + @Test + public void testAbfsHttpResponseStatistics() throws IOException { + describe("Test to check correct values of statistics after Http " + + "Response is processed."); + + AzureBlobFileSystem fs = getFileSystem(); + Path getResponsePath = path(getMethodName()); + Map<String, Long> metricMap; + String testResponseString = "some response"; + long getResponses, bytesReceived; + + FSDataOutputStream out = null; + FSDataInputStream in = null; + try { + + /* + * Creating a File and writing some bytes in it. + * + * get_response : 3(getFileSystem) + 1(OutputStream creation) + 2 + * (Writing data in Data store). + * + */ + out = fs.create(getResponsePath); + out.write(testResponseString.getBytes()); + out.hflush(); + + // open would require 1 get response. + in = fs.open(getResponsePath); + // read would require 1 get response and also get the bytes received. + int result = in.read(); + + // Confirming read isn't -1. + LOG.info("Result of read operation : {}", result); + + metricMap = fs.getInstrumentationMap(); + + /* + * Testing values of statistics after writing and reading a buffer. + * + * get_responses - 6(above operations) + 1(open()) + 1 (read()). + * + * bytes_received - This should be equal to bytes sent earlier. + */ + getResponses = assertAbfsStatistics(AbfsStatistic.GET_RESPONSES, 8, + metricMap); + // Testing that bytes received is equal to bytes sent. + long bytesSend = metricMap.get(AbfsStatistic.BYTES_SENT.getStatName()); + bytesReceived = assertAbfsStatistics(AbfsStatistic.BYTES_RECEIVED, + bytesSend, + metricMap); + + } finally { + IOUtils.cleanupWithLogger(LOG, out, in); + } + + // To close the streams 1 response is gotten. 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