HBASE-23377 Balancer should skip disabled tables's regions (#908)

Signed-off-by: Wellington Chevreuil <wchevreuil@apache.org>
Signed-off-by: GuangxuCheng  <guangxucheng@gmail.com>
Signed-off-by Anoop Sam John <anoopsamjohn@apache.org>
Signed-off-by: Reid Chan <reidchan@apache.org>

hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java

@@ -1796,7 +1796,8 @@ public class HMaster extends HRegionServer implements MasterServices {
 
       boolean isByTable = getConfiguration().getBoolean("hbase.master.loadbalance.bytable", false);
       Map<TableName, Map<ServerName, List<RegionInfo>>> assignments =
-          this.assignmentManager.getRegionStates().getAssignmentsForBalancer(isByTable);
+        this.assignmentManager.getRegionStates()
+          .getAssignmentsForBalancer(tableStateManager, isByTable);
       for (Map<ServerName, List<RegionInfo>> serverMap : assignments.values()) {
         serverMap.keySet().removeAll(this.serverManager.getDrainingServersList());
       }

hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java

@@ -581,8 +581,7 @@ public class AssignmentManager {
     if (!regionNode.isInState(expectedStates)) {
       throw new DoNotRetryRegionException("Unexpected state for " + regionNode);
     }
-    if (getTableStateManager().isTableState(regionNode.getTable(), TableState.State.DISABLING,
-      TableState.State.DISABLED)) {
+    if (isTableDisabled(regionNode.getTable())) {
       throw new DoNotRetryIOException(regionNode.getTable() + " is disabled for " + regionNode);
     }
   }

hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStates.java

@@ -37,8 +37,10 @@ import org.apache.hadoop.hbase.HRegionLocation;
 import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.RegionInfo;
+import org.apache.hadoop.hbase.client.TableState;
 import org.apache.hadoop.hbase.master.RegionState;
 import org.apache.hadoop.hbase.master.RegionState.State;
+import org.apache.hadoop.hbase.master.TableStateManager;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
@@ -537,10 +539,13 @@ public class RegionStates {
    * @return A clone of current assignments.
    */
   public Map<TableName, Map<ServerName, List<RegionInfo>>> getAssignmentsForBalancer(
-      boolean isByTable) {
+      TableStateManager tableStateManager, boolean isByTable) {
     final Map<TableName, Map<ServerName, List<RegionInfo>>> result = new HashMap<>();
     if (isByTable) {
       for (RegionStateNode node : regionsMap.values()) {
+        if (isTableDisabled(tableStateManager, node.getTable())) {
+          continue;
+        }
         Map<ServerName, List<RegionInfo>> tableResult =
             result.computeIfAbsent(node.getTable(), t -> new HashMap<>());
         final ServerName serverName = node.getRegionLocation();
@@ -561,7 +566,9 @@ public class RegionStates {
     } else {
       final HashMap<ServerName, List<RegionInfo>> ensemble = new HashMap<>(serverMap.size());
       for (ServerStateNode serverNode : serverMap.values()) {
-        ensemble.put(serverNode.getServerName(), serverNode.getRegionInfoList());
+        ensemble.put(serverNode.getServerName(), serverNode.getRegionInfoList().stream()
+          .filter(region -> !isTableDisabled(tableStateManager, region.getTable()))
+          .collect(Collectors.toList()));
       }
       // Use a fake table name to represent the whole cluster's assignments
       result.put(HConstants.ENSEMBLE_TABLE_NAME, ensemble);
@@ -569,6 +576,12 @@ public class RegionStates {
     return result;
   }
 
+  private boolean isTableDisabled(final TableStateManager tableStateManager,
+    final TableName tableName) {
+    return tableStateManager
+      .isTableState(tableName, TableState.State.DISABLED, TableState.State.DISABLING);
+  }
+
   // ==========================================================================
   //  Region in transition helpers
   // ==========================================================================

hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestBalancerWithDisabledTable.java

@@ -0,0 +1,104 @@
+/*
+ * 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 static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.ServerName;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.RegionInfo;
+import org.apache.hadoop.hbase.master.assignment.AssignmentManager;
+import org.apache.hadoop.hbase.testclassification.LargeTests;
+import org.apache.hadoop.hbase.testclassification.MasterTests;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.rules.TestName;
+
+/**
+ * Test balancer with disabled table
+ */
+@Category({ MasterTests.class, LargeTests.class })
+public class TestBalancerWithDisabledTable {
+
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+      HBaseClassTestRule.forClass(TestBalancerWithDisabledTable.class);
+
+  private final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
+
+  @Rule
+  public TestName name = new TestName();
+
+  @Before
+  public void before() throws Exception {
+    TEST_UTIL.startMiniCluster();
+  }
+
+  @After
+  public void after() throws Exception {
+    TEST_UTIL.shutdownMiniCluster();
+  }
+
+  @Test
+  public void testAssignmentsForBalancer() throws Exception {
+    final TableName tableName = TableName.valueOf(name.getMethodName());
+    TEST_UTIL.createMultiRegionTable(tableName, HConstants.CATALOG_FAMILY, 10);
+    // disable table
+    final TableName disableTableName = TableName.valueOf("testDisableTable");
+    TEST_UTIL.createMultiRegionTable(disableTableName, HConstants.CATALOG_FAMILY, 10);
+    TEST_UTIL.getAdmin().disableTable(disableTableName);
+
+    HMaster master = TEST_UTIL.getMiniHBaseCluster().getMaster();
+    AssignmentManager assignmentManager = master.getAssignmentManager();
+    TableStateManager tableStateManager = master.getTableStateManager();
+    Map<TableName, Map<ServerName, List<RegionInfo>>> assignments =
+      assignmentManager.getRegionStates().getAssignmentsForBalancer(tableStateManager, true);
+    assertFalse(assignments.containsKey(disableTableName));
+    assertTrue(assignments.containsKey(tableName));
+
+    assignments =
+      assignmentManager.getRegionStates().getAssignmentsForBalancer(tableStateManager, false);
+    Map<TableName, Map<ServerName, List<RegionInfo>>> tableNameMap = new HashMap<>();
+    for (Map.Entry<ServerName, List<RegionInfo>> entry : assignments
+      .get(HConstants.ENSEMBLE_TABLE_NAME).entrySet()) {
+      final ServerName serverName = entry.getKey();
+      for (RegionInfo regionInfo : entry.getValue()) {
+        Map<ServerName, List<RegionInfo>> tableResult =
+          tableNameMap.computeIfAbsent(regionInfo.getTable(), t -> new HashMap<>());
+        List<RegionInfo> serverResult =
+          tableResult.computeIfAbsent(serverName, s -> new ArrayList<>());
+        serverResult.add(regionInfo);
+      }
+    }
+    assertFalse(tableNameMap.containsKey(disableTableName));
+    assertTrue(tableNameMap.containsKey(tableName));
+  }
+}