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https://issues.apache.org/jira/browse/FLINK-8811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16383436#comment-16383436
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ASF GitHub Bot commented on FLINK-8811:
---------------------------------------

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

    https://github.com/apache/flink/pull/5600#discussion_r171814808
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/minicluster/MiniCluster.java
 ---
    @@ -178,6 +181,13 @@ public URI getRestAddress() {
                }
        }
     
    +   public HighAvailabilityServices getHighAvailabilityServices() {
    +           synchronized (lock) {
    +                   checkState(running, "MiniCluster is not yet running.");
    --- End diff --
    
    Because all state accesses to the MiniCluster are guarded since it can be 
used by potentially multiple threads.


> Add MiniClusterClient to allow fast MiniCluster operations
> ----------------------------------------------------------
>
>                 Key: FLINK-8811
>                 URL: https://issues.apache.org/jira/browse/FLINK-8811
>             Project: Flink
>          Issue Type: Improvement
>          Components: Tests
>    Affects Versions: 1.5.0, 1.6.0
>            Reporter: Till Rohrmann
>            Assignee: Till Rohrmann
>            Priority: Critical
>              Labels: flip-6
>             Fix For: 1.5.0, 1.6.0
>
>
> We should offer a {{ClusterClient}} implementation for the {{MiniCluster}}. 
> That way we would be able to submit and wait for result without polling how 
> it would be the case by using the {{RestClusterClient}}.



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