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https://issues.apache.org/jira/browse/FLINK-4348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15430702#comment-15430702
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ASF GitHub Bot commented on FLINK-4348:
---------------------------------------

Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2389#discussion_r75671701
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/rpc/taskexecutor/SlotAllocationResponse.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.flink.runtime.rpc.taskexecutor;
    +
    +import static org.apache.flink.util.Preconditions.checkNotNull;
    +
    +import org.apache.flink.runtime.clusterframework.types.AllocationID;
    +
    +import java.io.Serializable;
    +import java.util.UUID;
    +
    +/**
    + * base class  for response from TaskManager to a requestSlot from 
resourceManager
    + */
    +public abstract class SlotAllocationResponse implements Serializable {
    --- End diff --
    
    No serialVersionUID field defined.


> Implement communication from ResourceManager to TaskManager
> -----------------------------------------------------------
>
>                 Key: FLINK-4348
>                 URL: https://issues.apache.org/jira/browse/FLINK-4348
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Cluster Management
>            Reporter: Kurt Young
>            Assignee: zhangjing
>
> There are mainly 3 logics initiated from RM to TM:
> * Heartbeat, RM use heartbeat to sync with TM's slot status
> * SlotRequest, when RM decides to assign slot to JM, should first try to send 
> request to TM for slot. TM can either accept or reject this request.
> * FailureNotify, in some corner cases, TM will be marked as invalid by 
> cluster manager master(e.g. yarn master), but TM itself does not realize. RM 
> should send failure notify to TM and TM can terminate itself



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