HBASE-22662 Move RSGroupInfoManager to hbase-server (#368)

Signed-off-by: Guanghao Zhang <zghao@apache.org>

hbase-rsgroup/pom.xml

@@ -106,10 +106,6 @@
       <groupId>org.apache.hbase.thirdparty</groupId>
       <artifactId>hbase-shaded-miscellaneous</artifactId>
     </dependency>
-    <dependency>
-      <groupId>com.google.protobuf</groupId>
-      <artifactId>protobuf-java</artifactId>
-    </dependency>
     <dependency>
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>

hbase-rsgroup/src/main/java/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.java

@@ -121,8 +121,8 @@ public class RSGroupBasedLoadBalancer implements RSGroupableBalancer {
   public List<RegionPlan> balanceCluster(Map<ServerName, List<RegionInfo>> clusterState)
       throws HBaseIOException {
     if (!isOnline()) {
-      throw new ConstraintException(RSGroupInfoManager.RSGROUP_TABLE_NAME +
+      throw new ConstraintException(
-          " is not online, unable to perform balance");
+          RSGroupInfoManager.class.getSimpleName() + " is not online, unable to perform balance");
     }
 
     // Calculate correct assignments and a list of RegionPlan for mis-placed regions

hbase-rsgroup/src/test/java/org/apache/hadoop/hbase/rsgroup/TestRSGroupsOfflineMode.java

@@ -140,7 +140,7 @@ public class TestRSGroupsOfflineMode {
       }
     });
     // Move table to group and wait.
-    groupAdmin.moveTables(Sets.newHashSet(RSGroupInfoManager.RSGROUP_TABLE_NAME), newGroup);
+    groupAdmin.moveTables(Sets.newHashSet(RSGroupInfoManagerImpl.RSGROUP_TABLE_NAME), newGroup);
     LOG.info("Waiting for move table...");
     TEST_UTIL.waitFor(WAIT_TIMEOUT, new Waiter.Predicate<Exception>() {
       @Override
@@ -169,7 +169,7 @@ public class TestRSGroupsOfflineMode {
     // Make sure balancer is in offline mode, since this is what we're testing.
     assertFalse(groupMgr.isOnline());
     // Verify the group affiliation that's loaded from ZK instead of tables.
-    assertEquals(newGroup, groupMgr.getRSGroupOfTable(RSGroupInfoManager.RSGROUP_TABLE_NAME));
+    assertEquals(newGroup, groupMgr.getRSGroupOfTable(RSGroupInfoManagerImpl.RSGROUP_TABLE_NAME));
     assertEquals(RSGroupInfo.DEFAULT_GROUP, groupMgr.getRSGroupOfTable(failoverTable));
     // Kill final regionserver to see the failover happens for all tables except GROUP table since
     // it's group does not have any online RS.
@@ -182,7 +182,7 @@ public class TestRSGroupsOfflineMode {
         return failoverRS.getRegions(failoverTable).size() >= 1;
       }
     });
-    Assert.assertEquals(0, failoverRS.getRegions(RSGroupInfoManager.RSGROUP_TABLE_NAME).size());
+    Assert.assertEquals(0, failoverRS.getRegions(RSGroupInfoManagerImpl.RSGROUP_TABLE_NAME).size());
 
     // Need this for minicluster to shutdown cleanly.
     master.stopMaster();

hbase-rsgroup/src/test/java/org/apache/hadoop/hbase/rsgroup/VerifyingRSGroupAdminClient.java

@@ -52,7 +52,7 @@ public class VerifyingRSGroupAdminClient implements RSGroupAdmin {
       throws IOException {
     wrapped = RSGroupAdmin;
     table = ConnectionFactory.createConnection(conf)
-            .getTable(RSGroupInfoManager.RSGROUP_TABLE_NAME);
+        .getTable(RSGroupInfoManagerImpl.RSGROUP_TABLE_NAME);
     zkw = new ZKWatcher(conf, this.getClass().getSimpleName(), null);
   }
 
@@ -126,8 +126,8 @@ public class VerifyingRSGroupAdminClient implements RSGroupAdmin {
       RSGroupProtos.RSGroupInfo proto =
           RSGroupProtos.RSGroupInfo.parseFrom(
               result.getValue(
-                  RSGroupInfoManager.META_FAMILY_BYTES,
+                  RSGroupInfoManagerImpl.META_FAMILY_BYTES,
-                  RSGroupInfoManager.META_QUALIFIER_BYTES));
+                  RSGroupInfoManagerImpl.META_QUALIFIER_BYTES));
       groupMap.put(proto.getName(), ProtobufUtil.toGroupInfo(proto));
     }
     Assert.assertEquals(Sets.newHashSet(groupMap.values()),

hbase-server/src/main/java/org/apache/hadoop/hbase/rsgroup/RSGroupInfoManager.java

@@ -15,38 +15,22 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.apache.hadoop.hbase.rsgroup;
 
 import java.io.IOException;
 import java.util.List;
 import java.util.Set;
-
-import org.apache.hadoop.hbase.NamespaceDescriptor;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.net.Address;
-import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.yetus.audience.InterfaceAudience;
 
 /**
- * Interface used to manage RSGroupInfo storage. An implementation
+ * Interface used to manage RSGroupInfo storage. An implementation has the option to support offline
- * has the option to support offline mode.
+ * mode. See {@code RSGroupBasedLoadBalancer}.
- * See {@link RSGroupBasedLoadBalancer}
  */
 @InterfaceAudience.Private
 public interface RSGroupInfoManager {
 
-  String REASSIGN_WAIT_INTERVAL_KEY = "hbase.rsgroup.reassign.wait";
-  long DEFAULT_REASSIGN_WAIT_INTERVAL = 30 * 1000L;
-
-  //Assigned before user tables
-  TableName RSGROUP_TABLE_NAME =
-      TableName.valueOf(NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR, "rsgroup");
-  String rsGroupZNode = "rsgroup";
-  byte[] META_FAMILY_BYTES = Bytes.toBytes("m");
-  byte[] META_QUALIFIER_BYTES = Bytes.toBytes("i");
-  byte[] ROW_KEY = {0};
-
   void start();
 
   /**
@@ -86,7 +70,6 @@ public interface RSGroupInfoManager {
 
   /**
    * Set the group membership of a set of tables
-   *
    * @param tableNames set of tables to move
    * @param groupName name of group of tables to move to
    */
@@ -104,7 +87,6 @@ public interface RSGroupInfoManager {
 
   /**
    * Whether the manager is able to fully return group metadata
-   *
    * @return whether the manager is in online mode
    */
   boolean isOnline();
@@ -116,8 +98,8 @@ public interface RSGroupInfoManager {
    * @param srcGroup groupName being moved from
    * @param dstGroup groupName being moved to
    */
-  void moveServersAndTables(Set<Address> servers, Set<TableName> tables,
+  void moveServersAndTables(Set<Address> servers, Set<TableName> tables, String srcGroup,
-      String srcGroup, String dstGroup) throws IOException;
+      String dstGroup) throws IOException;
 
   /**
    * Remove decommissioned servers from rsgroup

hbase-server/src/main/java/org/apache/hadoop/hbase/rsgroup/RSGroupInfoManagerImpl.java

@@ -17,7 +17,6 @@
  */
 package org.apache.hadoop.hbase.rsgroup;
 
-import com.google.protobuf.ServiceException;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -34,10 +33,12 @@ import java.util.SortedSet;
 import java.util.TreeSet;
 import org.apache.hadoop.hbase.Coprocessor;
 import org.apache.hadoop.hbase.DoNotRetryIOException;
+import org.apache.hadoop.hbase.NamespaceDescriptor;
 import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.AsyncClusterConnection;
+import org.apache.hadoop.hbase.client.AsyncTable;
 import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
-import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.CoprocessorDescriptorBuilder;
 import org.apache.hadoop.hbase.client.Delete;
 import org.apache.hadoop.hbase.client.Get;
@@ -45,14 +46,11 @@ import org.apache.hadoop.hbase.client.Mutation;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.client.Result;
 import org.apache.hadoop.hbase.client.ResultScanner;
-import org.apache.hadoop.hbase.client.Scan;
-import org.apache.hadoop.hbase.client.Table;
 import org.apache.hadoop.hbase.client.TableDescriptor;
 import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
 import org.apache.hadoop.hbase.constraint.ConstraintException;
 import org.apache.hadoop.hbase.coprocessor.MultiRowMutationEndpoint;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
-import org.apache.hadoop.hbase.ipc.CoprocessorRpcChannel;
 import org.apache.hadoop.hbase.master.MasterServices;
 import org.apache.hadoop.hbase.master.ServerListener;
 import org.apache.hadoop.hbase.master.TableStateManager;
@@ -62,10 +60,14 @@ import org.apache.hadoop.hbase.net.Address;
 import org.apache.hadoop.hbase.procedure2.Procedure;
 import org.apache.hadoop.hbase.protobuf.ProtobufMagic;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
-import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProtos;
+import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutationProto;
+import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProtos.MultiRowMutationService;
+import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProtos.MutateRowsRequest;
+import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProtos.MutateRowsResponse;
 import org.apache.hadoop.hbase.protobuf.generated.RSGroupProtos;
 import org.apache.hadoop.hbase.regionserver.DisabledRegionSplitPolicy;
 import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.FutureUtils;
 import org.apache.hadoop.hbase.util.Threads;
 import org.apache.hadoop.hbase.zookeeper.ZKUtil;
 import org.apache.hadoop.hbase.zookeeper.ZKWatcher;
@@ -75,6 +77,7 @@ import org.apache.zookeeper.KeeperException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
 import org.apache.hbase.thirdparty.com.google.common.collect.Lists;
 import org.apache.hbase.thirdparty.com.google.common.collect.Maps;
 import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
@@ -87,13 +90,13 @@ import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
  * RSGroupInfo Map at {@link #rsGroupMap} and a Map of tables to the name of the rsgroup they belong
  * too (in {@link #tableMap}). These Maps are persisted to the hbase:rsgroup table (and cached in
  * zk) on each modification.
- * <p>
+ * <p/>
  * Mutations on state are synchronized but reads can continue without having to wait on an instance
  * monitor, mutations do wholesale replace of the Maps on update -- Copy-On-Write; the local Maps of
  * state are read-only, just-in-case (see flushConfig).
- * <p>
+ * <p/>
  * Reads must not block else there is a danger we'll deadlock.
- * <p>
+ * <p/>
  * Clients of this class, the {@link RSGroupAdminEndpoint} for example, want to query and then act
  * on the results of the query modifying cache in zookeeper without another thread making
  * intermediate modifications. These clients synchronize on the 'this' instance so no other has
@@ -103,6 +106,24 @@ import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
 final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
   private static final Logger LOG = LoggerFactory.getLogger(RSGroupInfoManagerImpl.class);
 
+  private static final String REASSIGN_WAIT_INTERVAL_KEY = "hbase.rsgroup.reassign.wait";
+  private static final long DEFAULT_REASSIGN_WAIT_INTERVAL = 30 * 1000L;
+
+  // Assigned before user tables
+  @VisibleForTesting
+  static final TableName RSGROUP_TABLE_NAME =
+      TableName.valueOf(NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR, "rsgroup");
+
+  private static final String RS_GROUP_ZNODE = "rsgroup";
+
+  @VisibleForTesting
+  static final byte[] META_FAMILY_BYTES = Bytes.toBytes("m");
+
+  @VisibleForTesting
+  static final byte[] META_QUALIFIER_BYTES = Bytes.toBytes("i");
+
+  private static final byte[] ROW_KEY = { 0 };
+
   /** Table descriptor for <code>hbase:rsgroup</code> catalog table */
   private static final TableDescriptor RSGROUP_TABLE_DESC;
   static {
@@ -125,7 +146,7 @@ final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
   private volatile Map<TableName, String> tableMap = Collections.emptyMap();
 
   private final MasterServices masterServices;
-  private final Connection conn;
+  private final AsyncClusterConnection conn;
   private final ZKWatcher watcher;
   private final RSGroupStartupWorker rsGroupStartupWorker;
   // contains list of groups that were last flushed to persistent store
@@ -136,7 +157,7 @@ final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
   private RSGroupInfoManagerImpl(MasterServices masterServices) throws IOException {
     this.masterServices = masterServices;
     this.watcher = masterServices.getZooKeeper();
-    this.conn = masterServices.getConnection();
+    this.conn = masterServices.getAsyncClusterConnection();
     this.rsGroupStartupWorker = new RSGroupStartupWorker();
   }
 
@@ -349,10 +370,10 @@ final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
     }
   }
 
-  List<RSGroupInfo> retrieveGroupListFromGroupTable() throws IOException {
+  private List<RSGroupInfo> retrieveGroupListFromGroupTable() throws IOException {
     List<RSGroupInfo> rsGroupInfoList = Lists.newArrayList();
-    try (Table table = conn.getTable(RSGROUP_TABLE_NAME);
+    AsyncTable<?> table = conn.getTable(RSGROUP_TABLE_NAME);
-        ResultScanner scanner = table.getScanner(new Scan())) {
+    try (ResultScanner scanner = table.getScanner(META_FAMILY_BYTES, META_QUALIFIER_BYTES)) {
       for (Result result;;) {
         result = scanner.next();
         if (result == null) {
@@ -366,8 +387,8 @@ final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
     return rsGroupInfoList;
   }
 
-  List<RSGroupInfo> retrieveGroupListFromZookeeper() throws IOException {
+  private List<RSGroupInfo> retrieveGroupListFromZookeeper() throws IOException {
-    String groupBasePath = ZNodePaths.joinZNode(watcher.getZNodePaths().baseZNode, rsGroupZNode);
+    String groupBasePath = ZNodePaths.joinZNode(watcher.getZNodePaths().baseZNode, RS_GROUP_ZNODE);
     List<RSGroupInfo> RSGroupInfoList = Lists.newArrayList();
     // Overwrite any info stored by table, this takes precedence
     try {
@@ -519,7 +540,8 @@ final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
     resetRSGroupAndTableMaps(newGroupMap, newTableMap);
 
     try {
-      String groupBasePath = ZNodePaths.joinZNode(watcher.getZNodePaths().baseZNode, rsGroupZNode);
+      String groupBasePath =
+          ZNodePaths.joinZNode(watcher.getZNodePaths().baseZNode, RS_GROUP_ZNODE);
       ZKUtil.createAndFailSilent(watcher, groupBasePath, ProtobufMagic.PB_MAGIC);
 
       List<ZKUtil.ZKUtilOp> zkOps = new ArrayList<>(newGroupMap.size());
@@ -702,11 +724,8 @@ final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
             createRSGroupTable();
           }
           // try reading from the table
-          try (Table table = conn.getTable(RSGROUP_TABLE_NAME)) {
+          FutureUtils.get(conn.getTable(RSGROUP_TABLE_NAME).get(new Get(ROW_KEY)));
-            table.get(new Get(ROW_KEY));
+          LOG.info("RSGroup table={} is online, refreshing cached information", RSGROUP_TABLE_NAME);
-          }
-          LOG.info(
-            "RSGroup table=" + RSGROUP_TABLE_NAME + " is online, refreshing cached information");
           RSGroupInfoManagerImpl.this.refresh(true);
           online = true;
           // flush any inconsistencies between ZK and HTable
@@ -748,8 +767,8 @@ final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
       } else {
         Procedure<?> result = masterServices.getMasterProcedureExecutor().getResult(procId);
         if (result != null && result.isFailed()) {
-          throw new IOException(
+          throw new IOException("Failed to create group table. " +
-            "Failed to create group table. " + MasterProcedureUtil.unwrapRemoteIOException(result));
+              MasterProcedureUtil.unwrapRemoteIOException(result));
         }
       }
     }
@@ -764,33 +783,24 @@ final class RSGroupInfoManagerImpl implements RSGroupInfoManager {
   }
 
   private void multiMutate(List<Mutation> mutations) throws IOException {
-    try (Table table = conn.getTable(RSGROUP_TABLE_NAME)) {
+    MutateRowsRequest.Builder builder = MutateRowsRequest.newBuilder();
-      CoprocessorRpcChannel channel = table.coprocessorService(ROW_KEY);
-      MultiRowMutationProtos.MutateRowsRequest.Builder mmrBuilder =
-        MultiRowMutationProtos.MutateRowsRequest.newBuilder();
     for (Mutation mutation : mutations) {
       if (mutation instanceof Put) {
-          mmrBuilder.addMutationRequest(org.apache.hadoop.hbase.protobuf.ProtobufUtil.toMutation(
+        builder
-            org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutationProto.MutationType.PUT,
+            .addMutationRequest(ProtobufUtil.toMutation(MutationProto.MutationType.PUT, mutation));
-            mutation));
       } else if (mutation instanceof Delete) {
-          mmrBuilder.addMutationRequest(org.apache.hadoop.hbase.protobuf.ProtobufUtil.toMutation(
+        builder.addMutationRequest(
-            org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutationProto.MutationType.DELETE,
+          ProtobufUtil.toMutation(MutationProto.MutationType.DELETE, mutation));
-            mutation));
       } else {
         throw new DoNotRetryIOException(
             "multiMutate doesn't support " + mutation.getClass().getName());
       }
     }
-
+    MutateRowsRequest request = builder.build();
-      MultiRowMutationProtos.MultiRowMutationService.BlockingInterface service =
+    AsyncTable<?> table = conn.getTable(RSGROUP_TABLE_NAME);
-        MultiRowMutationProtos.MultiRowMutationService.newBlockingStub(channel);
+    FutureUtils.get(table.<MultiRowMutationService, MutateRowsResponse> coprocessorService(
-      try {
+      MultiRowMutationService::newStub,
-        service.mutateRows(null, mmrBuilder.build());
+      (stub, controller, done) -> stub.mutateRows(controller, request, done), ROW_KEY));
-      } catch (ServiceException ex) {
-        ProtobufUtil.toIOException(ex);
-      }
-    }
   }
 
   private void checkGroupName(String groupName) throws ConstraintException {