hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationStatus.java

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