| /** |
| * 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.hbase.regionserver; |
| |
| |
| import java.io.IOException; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.Admin; |
| import org.apache.hadoop.hbase.client.Table; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.hbase.testclassification.RegionServerTests; |
| import org.junit.AfterClass; |
| import org.junit.Assert; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| /** |
| * Validate requestsPerSecond metric. |
| */ |
| @Category({ RegionServerTests.class, MediumTests.class }) |
| public class TestRequestsPerSecondMetric { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestRequestsPerSecondMetric.class); |
| |
| private static final HBaseTestingUtility UTIL = new HBaseTestingUtility(); |
| private static final long METRICS_PERIOD = 2000L; |
| private static Configuration conf; |
| |
| |
| @BeforeClass |
| public static void setup() throws Exception { |
| conf = UTIL.getConfiguration(); |
| conf.setLong(HConstants.REGIONSERVER_METRICS_PERIOD, METRICS_PERIOD); |
| UTIL.startMiniCluster(1); |
| } |
| |
| @AfterClass |
| public static void teardown() throws Exception { |
| UTIL.shutdownMiniCluster(); |
| } |
| |
| |
| @Test |
| /** |
| * This test will confirm no negative value in requestsPerSecond metric during any region |
| * transition(close region/remove region/move region). |
| * Firstly, load 2000 random rows for 25 regions and will trigger a metric. |
| * Now, metricCache will have a current read and write requests count. |
| * Next, we disable a table and all of its 25 regions will be closed. |
| * As part of region close, his metric will also be removed from metricCache. |
| * prior to HBASE-23237, we do not remove/reset his metric so we incorrectly compute |
| * (currentRequestCount - lastRequestCount) which result into negative value. |
| * |
| * @throws IOException |
| * @throws InterruptedException |
| */ |
| public void testNoNegativeSignAtRequestsPerSecond() throws IOException, InterruptedException { |
| final TableName TABLENAME = TableName.valueOf("t"); |
| final String FAMILY = "f"; |
| Admin admin = UTIL.getAdmin(); |
| UTIL.createMultiRegionTable(TABLENAME, FAMILY.getBytes(),25); |
| Table table = admin.getConnection().getTable(TABLENAME); |
| ServerName serverName = admin.getRegionServers().iterator().next(); |
| HRegionServer regionServer = UTIL.getMiniHBaseCluster().getRegionServer(serverName); |
| MetricsRegionServerWrapperImpl metricsWrapper = |
| new MetricsRegionServerWrapperImpl(regionServer); |
| MetricsRegionServerWrapperImpl.RegionServerMetricsWrapperRunnable metricsServer |
| = metricsWrapper.new RegionServerMetricsWrapperRunnable(); |
| metricsServer.run(); |
| UTIL.loadRandomRows(table, FAMILY.getBytes(), 1, 2000); |
| Thread.sleep(METRICS_PERIOD); |
| metricsServer.run(); |
| admin.disableTable(TABLENAME); |
| Thread.sleep(METRICS_PERIOD); |
| metricsServer.run(); |
| Assert.assertTrue(metricsWrapper.getRequestsPerSecond() > -1); |
| } |
| } |