hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestClusterId.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.regionserver;
  19
  20 import static org.junit.Assert.assertEquals;
  21 import static org.junit.Assert.assertNotNull;
  22
  23 import org.apache.hadoop.conf.Configuration;
  24 import org.apache.hadoop.fs.FSDataOutputStream;
  25 import org.apache.hadoop.fs.FileSystem;
  26 import org.apache.hadoop.fs.Path;
  27 import org.apache.hadoop.hbase.HBaseClassTestRule;
  28 import org.apache.hadoop.hbase.HBaseCommonTestingUtil;
  29 import org.apache.hadoop.hbase.HBaseTestingUtil;
  30 import org.apache.hadoop.hbase.HConstants;
  31 import org.apache.hadoop.hbase.StartTestingClusterOption;
  32 import org.apache.hadoop.hbase.master.HMaster;
  33 import org.apache.hadoop.hbase.testclassification.MediumTests;
  34 import org.apache.hadoop.hbase.testclassification.RegionServerTests;
  35 import org.apache.hadoop.hbase.util.CommonFSUtils;
  36 import org.apache.hadoop.hbase.util.JVMClusterUtil;
  37 import org.apache.hadoop.hbase.zookeeper.ZKClusterId;
  38 import org.junit.After;
  39 import org.junit.Before;
  40 import org.junit.ClassRule;
  41 import org.junit.Test;
  42 import org.junit.experimental.categories.Category;
  43
  44 /**
  45  * Test metrics incremented on region server operations.
  46  */
  47 @Category({RegionServerTests.class, MediumTests.class})
  48 public class TestClusterId {
  49
  50   @ClassRule
  51   public static final HBaseClassTestRule CLASS_RULE =
  52       HBaseClassTestRule.forClass(TestClusterId.class);
  53
  54   private final HBaseTestingUtil TEST_UTIL =
  55       new HBaseTestingUtil();
  56
  57   private JVMClusterUtil.RegionServerThread rst;
  58
  59   @Before
  60   public void setUp() throws Exception {
  61     TEST_UTIL.getConfiguration().setBoolean(ShutdownHook.RUN_SHUTDOWN_HOOK, false);
  62   }
  63
  64   @After
  65   public void tearDown() throws Exception {
  66     TEST_UTIL.shutdownMiniCluster();
  67     if(rst != null && rst.getRegionServer() != null) {
  68       rst.getRegionServer().stop("end of test");
  69       rst.join();
  70     }
  71   }
  72
  73   @Test
  74   public void testClusterId() throws Exception  {
  75     TEST_UTIL.startMiniZKCluster();
  76     TEST_UTIL.startMiniDFSCluster(1);
  77
  78     Configuration conf = new Configuration(TEST_UTIL.getConfiguration());
  79     //start region server, needs to be separate
  80     //so we get an unset clusterId
  81     rst = JVMClusterUtil.createRegionServerThread(conf, HRegionServer.class, 0);
  82     rst.start();
  83     //Make sure RS is in blocking state
  84     Thread.sleep(10000);
  85
  86     StartTestingClusterOption option = StartTestingClusterOption.builder()
  87         .numMasters(1).numRegionServers(0).build();
  88     TEST_UTIL.startMiniHBaseCluster(option);
  89
  90     rst.waitForServerOnline();
  91
  92     String clusterId = ZKClusterId.readClusterIdZNode(TEST_UTIL.getZooKeeperWatcher());
  93     assertNotNull(clusterId);
  94     assertEquals(clusterId, rst.getRegionServer().getClusterId());
  95   }
  96
  97   @Test
  98   public void testRewritingClusterIdToPB() throws Exception {
  99     TEST_UTIL.startMiniZKCluster();
 100     TEST_UTIL.startMiniDFSCluster(1);
 101     TEST_UTIL.createRootDir();
 102     Path rootDir = CommonFSUtils.getRootDir(TEST_UTIL.getConfiguration());
 103     FileSystem fs = rootDir.getFileSystem(TEST_UTIL.getConfiguration());
 104     Path filePath = new Path(rootDir, HConstants.CLUSTER_ID_FILE_NAME);
 105     FSDataOutputStream s = null;
 106     try {
 107       s = fs.create(filePath);
 108       s.writeUTF(HBaseCommonTestingUtil.getRandomUUID().toString());
 109     } finally {
 110       if (s != null) {
 111         s.close();
 112       }
 113     }
 114     TEST_UTIL.startMiniHBaseCluster();
 115     HMaster master = TEST_UTIL.getHBaseCluster().getMaster();
 116     assertEquals(1, master.getServerManager().getOnlineServersList().size());
 117   }
 118
 119 }
 120