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Posted to issues@hbase.apache.org by GitBox <gi...@apache.org> on 2021/08/09 20:56:30 UTC
[GitHub] [hbase] saintstack commented on a change in pull request #3550: HBASE-26150 Let region server also carry ClientMetaService
saintstack commented on a change in pull request #3550:
URL: https://github.com/apache/hbase/pull/3550#discussion_r685510316
##########
File path: hbase-client/src/main/java/org/apache/hadoop/hbase/client/RpcConnectionRegistry.java
##########
@@ -0,0 +1,99 @@
+/**
+ * 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 java.io.IOException;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Collectors;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HBaseInterfaceAudience;
+import org.apache.hadoop.hbase.ServerName;
+import org.apache.yetus.audience.InterfaceAudience;
+
+import org.apache.hbase.thirdparty.com.google.common.base.Splitter;
+
+import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.ClientMetaService;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetBootstrapNodesRequest;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetBootstrapNodesResponse;
+
+/**
+ * Rpc based connection registry. It will make use of the {@link ClientMetaService} to get registry
+ * information.
+ * <p/>
+ * It needs bootstrap node list when start up, and then it will use {@link ClientMetaService} to
+ * refresh the bootstrap node list periodically.
+ * <p/>
+ * Usually, you could set masters as the bootstrap nodes,as they will also implement the
+ * {@link ClientMetaService}, and then, we will switch to use region servers after refreshing the
+ * bootstrap nodes.
Review comment:
This is interesting. Is there pointer to how this will work -- the transition to RSs fielding Registry calls?
##########
File path: hbase-protocol-shaded/src/main/protobuf/server/Registry.proto
##########
@@ -0,0 +1,108 @@
+/**
+ * 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.
+ */
+syntax = "proto2";
+
+// The protos for ConnectionRegistry.
+package hbase.pb;
+
+option java_package = "org.apache.hadoop.hbase.shaded.protobuf.generated";
+option java_outer_classname = "RegistryProtos";
+option java_generic_services = true;
+option java_generate_equals_and_hash = true;
+option optimize_for = SPEED;
+
+import "HBase.proto";
+
+/** Request and response to get the clusterID for this cluster */
+message GetClusterIdRequest {
+}
+message GetClusterIdResponse {
+ /** Not set if cluster ID could not be determined. */
+ optional string cluster_id = 1;
+}
+
+/** Request and response to get the currently active master name for this cluster */
+message GetActiveMasterRequest {
+}
+message GetActiveMasterResponse {
+ /** Not set if an active master could not be determined. */
+ optional ServerName server_name = 1;
+}
+
+/** Request and response to get the current list of all registers master servers */
+message GetMastersRequest {
+ option deprecated = true;
+}
+message GetMastersResponseEntry {
+ option deprecated = true;
+ required ServerName server_name = 1;
+ required bool is_active = 2;
+}
+message GetMastersResponse {
+ option deprecated = true;
+ repeated GetMastersResponseEntry master_servers = 1;
+}
+
+/** Request and response to get the current list of meta region locations */
+message GetMetaRegionLocationsRequest {
+}
+message GetMetaRegionLocationsResponse {
+ /** Not set if meta region locations could not be determined. */
+ repeated RegionLocation meta_locations = 1;
+}
+
+/** Request and response to get the nodes which could be used to as ClientMetaService */
+message GetBootstrapNodesRequest {
+}
+message GetBootstrapNodesResponse {
+ repeated ServerName server_name = 1;
+}
+
+/**
+ * Implements all the RPCs needed by clients to look up cluster meta information needed for
+ * connection establishment.
+ */
+service ClientMetaService {
+ /**
+ * Get Cluster ID for this cluster.
+ */
+ rpc GetClusterId(GetClusterIdRequest) returns(GetClusterIdResponse);
+
+ /**
+ * Get active master server name for this cluster. Retained for out of sync client and master
+ * rolling upgrades. Newer clients switched to GetMasters RPC request.
+ */
+ rpc GetActiveMaster(GetActiveMasterRequest) returns(GetActiveMasterResponse);
+
+ /**
+ * Get registered list of master servers in this cluster.
+ */
+ rpc GetMasters(GetMastersRequest) returns(GetMastersResponse) {
+ option deprecated = true;
+ };
+
+ /**
+ * Get current meta replicas' region locations.
+ */
+ rpc GetMetaRegionLocations(GetMetaRegionLocationsRequest) returns(GetMetaRegionLocationsResponse);
+
+ /**
+ * Get nodes which could be used as ClientMetaService
+ */
+ rpc GetBootstrapNodes(GetBootstrapNodesRequest) returns (GetBootstrapNodesResponse);
+}
Review comment:
Good -- i.e. moving to own proto file.
##########
File path: hbase-client/src/main/java/org/apache/hadoop/hbase/client/AbstractRpcBasedConnectionRegistry.java
##########
@@ -0,0 +1,283 @@
+/**
+ * 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.trace.TraceUtil.trace;
+import static org.apache.hadoop.hbase.trace.TraceUtil.tracedFuture;
+import static org.apache.hadoop.hbase.util.FutureUtils.addListener;
+
+import com.google.errorprone.annotations.RestrictedApi;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Predicate;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.HRegionLocation;
+import org.apache.hadoop.hbase.RegionLocations;
+import org.apache.hadoop.hbase.ServerName;
+import org.apache.hadoop.hbase.exceptions.ClientExceptionsUtil;
+import org.apache.hadoop.hbase.exceptions.MasterRegistryFetchException;
+import org.apache.hadoop.hbase.ipc.HBaseRpcController;
+import org.apache.hadoop.hbase.ipc.RpcClient;
+import org.apache.hadoop.hbase.ipc.RpcClientFactory;
+import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
+import org.apache.hadoop.hbase.security.User;
+import org.apache.hadoop.hbase.util.FutureUtils;
+import org.apache.yetus.audience.InterfaceAudience;
+
+import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;
+import org.apache.hbase.thirdparty.com.google.common.collect.ImmutableMap;
+import org.apache.hbase.thirdparty.com.google.protobuf.Message;
+import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback;
+
+import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.ClientMetaService;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetActiveMasterRequest;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetActiveMasterResponse;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetClusterIdRequest;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetClusterIdResponse;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetMetaRegionLocationsRequest;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.RegistryProtos.GetMetaRegionLocationsResponse;
+
+/**
+ * Base class for rpc based connection registry implementation.
+ * <p/>
+ * The implementation needs a bootstrap node list in configuration, and then it will use the methods
+ * in {@link ClientMetaService} to refresh the connection registry end points.
+ * <p/>
+ * It also supports hedged reads, the default fan out value is 2.
+ * <p/>
+ * For the actual configuration names, see javadoc of sub classes.
+ */
+@InterfaceAudience.Private
+abstract class AbstractRpcBasedConnectionRegistry implements ConnectionRegistry {
+
+ /** Default value for the fan out of hedged requests. **/
+ public static final int HEDGED_REQS_FANOUT_DEFAULT = 2;
+
+ private final int hedgedReadFanOut;
+
+ // Configured list of end points to probe the meta information from.
+ private volatile ImmutableMap<ServerName, ClientMetaService.Interface> addr2Stub;
+
+ // RPC client used to talk to the masters.
+ private final RpcClient rpcClient;
+ private final RpcControllerFactory rpcControllerFactory;
+ private final int rpcTimeoutMs;
+
+ private final RegistryEndpointsRefresher registryEndpointRefresher;
+
+ protected AbstractRpcBasedConnectionRegistry(Configuration conf,
+ String hedgedReqsFanoutConfigName, String refreshIntervalSecsConfigName,
+ String minRefreshIntervalSecsConfigName) throws IOException {
+ this.hedgedReadFanOut =
+ Math.max(1, conf.getInt(hedgedReqsFanoutConfigName, HEDGED_REQS_FANOUT_DEFAULT));
+ rpcTimeoutMs = (int) Math.min(Integer.MAX_VALUE,
+ conf.getLong(HConstants.HBASE_RPC_TIMEOUT_KEY, HConstants.DEFAULT_HBASE_RPC_TIMEOUT));
+ // XXX: we pass cluster id as null here since we do not have a cluster id yet, we have to fetch
+ // this through the master registry...
+ // This is a problem as we will use the cluster id to determine the authentication method
Review comment:
This is interesting. Needs a JIRA?
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