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https://issues.apache.org/jira/browse/FLINK-4354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15855218#comment-15855218
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ASF GitHub Bot commented on FLINK-4354:
---------------------------------------

Github user wangzhijiang999 commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2770#discussion_r99737204
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/taskexecutor/TaskExecutor.java
 ---
    @@ -1099,4 +1121,23 @@ public void run() {
                        });
                }
        }
    +
    +   private final class ResourceManagerHeartbeatListener implements 
HeartbeatListener {
    +
    +           ResourceManagerHeartbeatListener() {
    +           }
    +
    +           @Override
    +           public void notifyHeartbeatTimeout(ResourceID resourceID) {
    +           }
    --- End diff --
    
    It will be added in the new modifications


>  Implement TaskManager side of heartbeat from ResourceManager
> -------------------------------------------------------------
>
>                 Key: FLINK-4354
>                 URL: https://issues.apache.org/jira/browse/FLINK-4354
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Cluster Management
>            Reporter: Zhijiang Wang
>            Assignee: Zhijiang Wang
>
> The {{ResourceManager}} initiates heartbeat messages via the {{RmLeaderID}}. 
> The {{TaskManager}} transmits its slot availability with each heartbeat. That 
> way, the RM will always know about available slots.



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