hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationStatus.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.replication;
  19
  20 import static org.junit.Assert.assertEquals;
  21 import static org.junit.Assert.assertTrue;
  22 import java.io.IOException;
  23 import java.util.EnumSet;
  24 import java.util.List;
  25 import org.apache.hadoop.hbase.ClusterMetrics;
  26 import org.apache.hadoop.hbase.ClusterMetrics.Option;
  27 import org.apache.hadoop.hbase.HBaseClassTestRule;
  28 import org.apache.hadoop.hbase.ServerMetrics;
  29 import org.apache.hadoop.hbase.ServerName;
  30 import org.apache.hadoop.hbase.Waiter;
  31 import org.apache.hadoop.hbase.client.Admin;
  32 import org.apache.hadoop.hbase.client.Put;
  33 import org.apache.hadoop.hbase.regionserver.HRegionServer;
  34 import org.apache.hadoop.hbase.testclassification.MediumTests;
  35 import org.apache.hadoop.hbase.testclassification.ReplicationTests;
  36 import org.apache.hadoop.hbase.util.Bytes;
  37 import org.apache.hadoop.hbase.util.JVMClusterUtil;
  38 import org.apache.hadoop.hbase.util.Threads;
  39 import org.junit.ClassRule;
  40 import org.junit.Test;
  41 import org.junit.experimental.categories.Category;
  42 import org.slf4j.Logger;
  43 import org.slf4j.LoggerFactory;
  44
  45 @Category({ ReplicationTests.class, MediumTests.class })
  46 public class TestReplicationStatus extends TestReplicationBase {
  47   private static final Logger LOG = LoggerFactory.getLogger(TestReplicationStatus.class);
  48
  49   @ClassRule
  50   public static final HBaseClassTestRule CLASS_RULE =
  51     HBaseClassTestRule.forClass(TestReplicationStatus.class);
  52
  53   static void insertRowsOnSource() throws IOException {
  54     final byte[] qualName = Bytes.toBytes("q");
  55     for (int i = 0; i < NB_ROWS_IN_BATCH; i++) {
  56       Put p = new Put(Bytes.toBytes("row" + i));
  57       p.addColumn(famName, qualName, Bytes.toBytes("val" + i));
  58       htable1.put(p);
  59     }
  60   }
  61
  62   /**
  63    * Test for HBASE-9531.
  64    * <p/>
  65    * put a few rows into htable1, which should be replicated to htable2 <br/>
  66    * create a ClusterStatus instance 'status' from HBaseAdmin <br/>
  67    * test : status.getLoad(server).getReplicationLoadSourceList() <br/>
  68    * test : status.getLoad(server).getReplicationLoadSink()
  69    */
  70   @Test
  71   public void testReplicationStatus() throws Exception {
  72     // This test wants two RS's up. We only run one generally so add one.
  73     UTIL1.getMiniHBaseCluster().startRegionServer();
  74     Waiter.waitFor(UTIL1.getConfiguration(), 30000, new Waiter.Predicate<Exception>() {
  75       @Override public boolean evaluate() throws Exception {
  76         return UTIL1.getMiniHBaseCluster().getLiveRegionServerThreads().size() > 1;
  77       }
  78     });
  79     Admin hbaseAdmin = UTIL1.getAdmin();
  80     // disable peer <= WHY? I DON'T GET THIS DISABLE BUT TEST FAILS W/O IT.
  81     hbaseAdmin.disableReplicationPeer(PEER_ID2);
  82     insertRowsOnSource();
  83     LOG.info("AFTER PUTS");
  84     // TODO: Change this wait to a barrier. I tried waiting on replication stats to
  85     // change but sleeping in main thread seems to mess up background replication.
  86     // HACK! To address flakeyness.
  87     Threads.sleep(10000);
  88     ClusterMetrics metrics = hbaseAdmin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS));
  89     for (JVMClusterUtil.RegionServerThread thread : UTIL1.getHBaseCluster().
  90         getRegionServerThreads()) {
  91       ServerName server = thread.getRegionServer().getServerName();
  92       assertTrue("" + server, metrics.getLiveServerMetrics().containsKey(server));
  93       ServerMetrics sm = metrics.getLiveServerMetrics().get(server);
  94       List<ReplicationLoadSource> rLoadSourceList = sm.getReplicationLoadSourceList();
  95       ReplicationLoadSink rLoadSink = sm.getReplicationLoadSink();
  96
  97       // check SourceList only has one entry, because only has one peer
  98       assertEquals("Failed to get ReplicationLoadSourceList " +
  99         rLoadSourceList + ", " + server,1, rLoadSourceList.size());
 100       assertEquals(PEER_ID2, rLoadSourceList.get(0).getPeerID());
 101
 102       // check Sink exist only as it is difficult to verify the value on the fly
 103       assertTrue("failed to get ReplicationLoadSink.AgeOfLastShippedOp ",
 104         (rLoadSink.getAgeOfLastAppliedOp() >= 0));
 105       assertTrue("failed to get ReplicationLoadSink.TimeStampsOfLastAppliedOp ",
 106         (rLoadSink.getTimestampsOfLastAppliedOp() >= 0));
 107     }
 108
 109     // Stop rs1, then the queue of rs1 will be transfered to rs0
 110     HRegionServer hrs = UTIL1.getHBaseCluster().getRegionServer(1);
 111     hrs.stop("Stop RegionServer");
 112     while(hrs.isAlive()) {
 113       Threads.sleep(100);
 114     }
 115     // To be sure it dead and references cleaned up. TODO: Change this to a barrier.
 116     // I tried waiting on replication stats to change but sleeping in main thread
 117     // seems to mess up background replication.
 118     Threads.sleep(10000);
 119     ServerName server = UTIL1.getHBaseCluster().getRegionServer(0).getServerName();
 120     List<ReplicationLoadSource> rLoadSourceList = waitOnMetricsReport(1, server);
 121     // The remaining server should now have two queues -- the original and then the one that was
 122     // added because of failover. The original should still be PEER_ID2 though.
 123     assertEquals("Failed ReplicationLoadSourceList " + rLoadSourceList, 2, rLoadSourceList.size());
 124     assertEquals(PEER_ID2, rLoadSourceList.get(0).getPeerID());
 125   }
 126
 127   /**
 128    * Wait until Master shows metrics counts for ReplicationLoadSourceList that are
 129    * greater than <code>greaterThan</code> for <code>serverName</code> before
 130    * returning. We want to avoid case where RS hasn't yet updated Master before
 131    * allowing test proceed.
 132    * @param greaterThan size of replicationLoadSourceList must be greater before we proceed
 133    */
 134   private List<ReplicationLoadSource> waitOnMetricsReport(int greaterThan, ServerName serverName)
 135       throws IOException {
 136     ClusterMetrics metrics = hbaseAdmin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS));
 137     List<ReplicationLoadSource> list =
 138       metrics.getLiveServerMetrics().get(serverName).getReplicationLoadSourceList();
 139     while(list.size() <= greaterThan) {
 140       Threads.sleep(1000);
 141     }
 142     return list;
 143   }
 144 }