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https://issues.apache.org/jira/browse/FLINK-4516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15449286#comment-15449286
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ASF GitHub Bot commented on FLINK-4516:
---------------------------------------
Github user mxm commented on a diff in the pull request:
https://github.com/apache/flink/pull/2427#discussion_r76816215
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/rpc/TestingSerialRpcService.java
---
@@ -0,0 +1,336 @@
+/*
+ * 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.flink.runtime.rpc;
+
+import akka.dispatch.ExecutionContexts;
+import akka.dispatch.Futures;
+import akka.util.Timeout;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.runtime.util.DirectExecutorService;
+import org.apache.flink.util.Preconditions;
+import scala.concurrent.Await;
+import scala.concurrent.ExecutionContext;
+import scala.concurrent.Future;
+import scala.concurrent.duration.FiniteDuration;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.BitSet;
+import java.util.UUID;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
+
+
+/**
+ * An RPC Service implementation for testing. This RPC service directly
executes all asynchronous calls one by one in the main thread.
+ */
+public class TestingSerialRpcService extends TestingRpcService {
--- End diff --
This still extends the full `TestingRpcService` which extends the
`AkkaService`. I think we can just implement this as a direct `RpcService`.
> ResourceManager leadership election
> -----------------------------------
>
> Key: FLINK-4516
> URL: https://issues.apache.org/jira/browse/FLINK-4516
> Project: Flink
> Issue Type: Sub-task
> Components: Cluster Management
> Reporter: zhangjing
> Assignee: zhangjing
>
> 1. When a resourceManager is started, it starts the leadership election
> service first and take part in contending for leadership
> 2. Every resourceManager contains a ResourceManagerLeaderContender, when it
> is granted leadership, it will start SlotManager and other main components.
> when it is revoked leadership, it will stop all its components and clear
> everything.
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