| /** |
| * 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.master; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HRegionInfo; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.ClusterConnection; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.hadoop.hbase.client.Get; |
| import org.apache.hadoop.hbase.client.Result; |
| import org.apache.hadoop.hbase.client.Table; |
| import org.apache.hadoop.hbase.master.RegionState.State; |
| import org.apache.hadoop.hbase.testclassification.MasterTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.UUID; |
| import java.util.concurrent.BrokenBarrierException; |
| import java.util.concurrent.CyclicBarrier; |
| |
| import org.mockito.Mockito; |
| import org.mockito.invocation.InvocationOnMock; |
| import org.mockito.stubbing.Answer; |
| |
| import java.io.IOException; |
| import static org.junit.Assert.assertTrue; |
| import static junit.framework.Assert.assertFalse; |
| import static org.mockito.Matchers.isA; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.when; |
| |
| @Category({MasterTests.class, SmallTests.class}) |
| public class TestRegionStates { |
| @Test (timeout=10000) |
| public void testCanMakeProgressThoughMetaIsDown() |
| throws IOException, InterruptedException, BrokenBarrierException { |
| MasterServices server = mock(MasterServices.class); |
| when(server.getServerName()).thenReturn(ServerName.valueOf("master,1,1")); |
| Connection connection = mock(ClusterConnection.class); |
| // Set up a table that gets 'stuck' when we try to fetch a row from the meta table. |
| // It is stuck on a CyclicBarrier latch. We use CyclicBarrier because it will tell us when |
| // thread is waiting on latch. |
| Table metaTable = Mockito.mock(Table.class); |
| final CyclicBarrier latch = new CyclicBarrier(2); |
| when(metaTable.get((Get)Mockito.any())).thenAnswer(new Answer<Result>() { |
| @Override |
| public Result answer(InvocationOnMock invocation) throws Throwable { |
| latch.await(); |
| throw new java.net.ConnectException("Connection refused"); |
| } |
| }); |
| when(connection.getTable(TableName.META_TABLE_NAME)).thenReturn(metaTable); |
| when(server.getConnection()).thenReturn((ClusterConnection)connection); |
| Configuration configuration = mock(Configuration.class); |
| when(server.getConfiguration()).thenReturn(configuration); |
| TableStateManager tsm = mock(TableStateManager.class); |
| ServerManager sm = mock(ServerManager.class); |
| when(sm.isServerOnline(isA(ServerName.class))).thenReturn(true); |
| |
| RegionStateStore rss = mock(RegionStateStore.class); |
| final RegionStates regionStates = new RegionStates(server, tsm, sm, rss); |
| final ServerName sn = mockServer("one", 1); |
| regionStates.updateRegionState(HRegionInfo.FIRST_META_REGIONINFO, State.SPLITTING_NEW, sn); |
| Thread backgroundThread = new Thread("Get stuck setting server offline") { |
| @Override |
| public void run() { |
| regionStates.serverOffline(sn); |
| } |
| }; |
| assertTrue(latch.getNumberWaiting() == 0); |
| backgroundThread.start(); |
| while (latch.getNumberWaiting() == 0); |
| // Verify I can do stuff with synchronized RegionStates methods, that I am not locked out. |
| // Below is a call that is synchronized. Can I do it and not block? |
| regionStates.getRegionServerOfRegion(HRegionInfo.FIRST_META_REGIONINFO); |
| // Done. Trip the barrier on the background thread. |
| latch.await(); |
| } |
| |
| @Test |
| public void testWeDontReturnDrainingServersForOurBalancePlans() throws Exception { |
| MasterServices server = mock(MasterServices.class); |
| when(server.getServerName()).thenReturn(ServerName.valueOf("master,1,1")); |
| Configuration configuration = mock(Configuration.class); |
| when(server.getConfiguration()).thenReturn(configuration); |
| TableStateManager tsm = mock(TableStateManager.class); |
| ServerManager sm = mock(ServerManager.class); |
| when(sm.isServerOnline(isA(ServerName.class))).thenReturn(true); |
| |
| RegionStateStore rss = mock(RegionStateStore.class); |
| RegionStates regionStates = new RegionStates(server, tsm, sm, rss); |
| |
| ServerName one = mockServer("one", 1); |
| ServerName two = mockServer("two", 1); |
| ServerName three = mockServer("three", 1); |
| |
| when(sm.getDrainingServersList()).thenReturn(Arrays.asList(three)); |
| |
| regionStates.regionOnline(createFakeRegion(), one); |
| regionStates.regionOnline(createFakeRegion(), two); |
| regionStates.regionOnline(createFakeRegion(), three); |
| |
| |
| Map<TableName, Map<ServerName, List<HRegionInfo>>> result = |
| regionStates.getAssignmentsByTable(); |
| for (Map<ServerName, List<HRegionInfo>> map : result.values()) { |
| assertFalse(map.keySet().contains(three)); |
| } |
| } |
| |
| private HRegionInfo createFakeRegion() { |
| HRegionInfo info = mock(HRegionInfo.class); |
| when(info.getEncodedName()).thenReturn(UUID.randomUUID().toString()); |
| return info; |
| } |
| |
| private ServerName mockServer(String fakeHost, int fakePort) { |
| ServerName serverName = mock(ServerName.class); |
| when(serverName.getHostname()).thenReturn(fakeHost); |
| when(serverName.getPort()).thenReturn(fakePort); |
| return serverName; |
| } |
| } |