| /* |
| * 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.client; |
| |
| import static org.apache.hadoop.hbase.HConstants.EMPTY_START_ROW; |
| import static org.apache.hadoop.hbase.TableName.META_TABLE_NAME; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotEquals; |
| |
| import java.io.IOException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.stream.IntStream; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseTestingUtil; |
| import org.apache.hadoop.hbase.RegionLocations; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.security.User; |
| import org.apache.hadoop.hbase.testclassification.ClientTests; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hbase.thirdparty.com.google.common.io.Closeables; |
| |
| @Category({ MediumTests.class, ClientTests.class }) |
| public class TestCatalogReplicaLoadBalanceSimpleSelector { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestCatalogReplicaLoadBalanceSimpleSelector.class); |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(TestCatalogReplicaLoadBalanceSimpleSelector.class); |
| |
| private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil(); |
| |
| private static final int NB_SERVERS = 4; |
| private static int numOfMetaReplica = NB_SERVERS - 1; |
| |
| private static AsyncConnectionImpl CONN; |
| |
| private static ConnectionRegistry registry; |
| private static Admin admin; |
| |
| @BeforeClass |
| public static void setUp() throws Exception { |
| Configuration conf = TEST_UTIL.getConfiguration(); |
| |
| TEST_UTIL.startMiniCluster(NB_SERVERS); |
| admin = TEST_UTIL.getAdmin(); |
| admin.balancerSwitch(false, true); |
| |
| // Enable hbase:meta replication. |
| HBaseTestingUtil.setReplicas(admin, TableName.META_TABLE_NAME, numOfMetaReplica); |
| TEST_UTIL.waitFor(30000, |
| () -> TEST_UTIL.getMiniHBaseCluster().getRegions(TableName.META_TABLE_NAME).size() |
| >= numOfMetaReplica); |
| |
| registry = ConnectionRegistryFactory.create(TEST_UTIL.getConfiguration(), User.getCurrent()); |
| CONN = new AsyncConnectionImpl(conf, registry, registry.getClusterId().get(), null, |
| User.getCurrent()); |
| } |
| |
| @AfterClass |
| public static void tearDown() throws Exception { |
| Closeables.close(CONN, true); |
| TEST_UTIL.shutdownMiniCluster(); |
| } |
| |
| @Test |
| public void testMetaChangeFromReplicaNoReplica() throws IOException, InterruptedException { |
| String replicaSelectorClass = |
| CONN.getConfiguration().get(RegionLocator.LOCATOR_META_REPLICAS_MODE_LOADBALANCE_SELECTOR, |
| CatalogReplicaLoadBalanceSimpleSelector.class.getName()); |
| |
| CatalogReplicaLoadBalanceSelector metaSelector = CatalogReplicaLoadBalanceSelectorFactory |
| .createSelector(replicaSelectorClass, META_TABLE_NAME, CONN, () -> { |
| int numOfReplicas = CatalogReplicaLoadBalanceSelector.UNINITIALIZED_NUM_OF_REPLICAS; |
| try { |
| RegionLocations metaLocations = CONN.registry.getMetaRegionLocations() |
| .get(CONN.connConf.getReadRpcTimeoutNs(), TimeUnit.NANOSECONDS); |
| numOfReplicas = metaLocations.size(); |
| } catch (Exception e) { |
| LOG.error("Failed to get table {}'s region replication, ", META_TABLE_NAME, e); |
| } |
| return numOfReplicas; |
| }); |
| |
| // Loop for 100 times, it should cover all replica ids. |
| int[] replicaIdCount = new int[numOfMetaReplica]; |
| IntStream.range(1, 100).forEach(i -> replicaIdCount[metaSelector |
| .select(TableName.valueOf("test"), EMPTY_START_ROW, RegionLocateType.CURRENT)]++); |
| |
| // Make sure each replica id is returned by select() call, including primary replica id. |
| IntStream.range(0, numOfMetaReplica).forEach(i -> assertNotEquals(replicaIdCount[i], 0)); |
| |
| // Change to No meta replica |
| HBaseTestingUtil.setReplicas(admin, TableName.META_TABLE_NAME, 1); |
| TEST_UTIL.waitFor(30000, |
| () -> TEST_UTIL.getMiniHBaseCluster().getRegions(TableName.META_TABLE_NAME).size() == 1); |
| |
| CatalogReplicaLoadBalanceSelector metaSelectorWithNoReplica = |
| CatalogReplicaLoadBalanceSelectorFactory.createSelector(replicaSelectorClass, META_TABLE_NAME, |
| CONN, () -> { |
| int numOfReplicas = CatalogReplicaLoadBalanceSelector.UNINITIALIZED_NUM_OF_REPLICAS; |
| try { |
| RegionLocations metaLocations = CONN.registry.getMetaRegionLocations() |
| .get(CONN.connConf.getReadRpcTimeoutNs(), TimeUnit.NANOSECONDS); |
| numOfReplicas = metaLocations.size(); |
| } catch (Exception e) { |
| LOG.error("Failed to get table {}'s region replication, ", META_TABLE_NAME, e); |
| } |
| return numOfReplicas; |
| }); |
| assertEquals(metaSelectorWithNoReplica.select(TableName.valueOf("test"), EMPTY_START_ROW, |
| RegionLocateType.CURRENT), RegionReplicaUtil.DEFAULT_REPLICA_ID); |
| } |
| } |