[ 
https://issues.apache.org/jira/browse/FLINK-8776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16376552#comment-16376552
 ] 

ASF GitHub Bot commented on FLINK-8776:
---------------------------------------

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

    https://github.com/apache/flink/pull/5577#discussion_r170526240
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/leaderretrieval/SettableLeaderRetrievalService.java
 ---
    @@ -16,36 +16,34 @@
      * limitations under the License.
      */
     
    -package org.apache.flink.runtime.leaderelection;
    +package org.apache.flink.runtime.leaderretrieval;
     
    -import org.apache.flink.runtime.leaderretrieval.LeaderRetrievalListener;
    -import org.apache.flink.runtime.leaderretrieval.LeaderRetrievalService;
     import org.apache.flink.util.Preconditions;
     
     import java.util.UUID;
     
     /**
    - * Test {@link LeaderRetrievalService} implementation which directly 
forwards calls of
    + * {@link LeaderRetrievalService} implementation which directly forwards 
calls of
      * notifyListener to the listener.
      */
    -public class TestingLeaderRetrievalService implements 
LeaderRetrievalService {
    +public class SettableLeaderRetrievalService implements 
LeaderRetrievalService {
     
    -   private volatile String leaderAddress;
    -   private volatile UUID leaderSessionID;
    +   private String leaderAddress;
    +   private UUID leaderSessionID;
     
    -   private volatile LeaderRetrievalListener listener;
    +   private LeaderRetrievalListener listener;
     
    -   public TestingLeaderRetrievalService() {
    +   public SettableLeaderRetrievalService() {
                this(null, null);
        }
     
    -   public TestingLeaderRetrievalService(String leaderAddress, UUID 
leaderSessionID) {
    +   public SettableLeaderRetrievalService(String leaderAddress, UUID 
leaderSessionID) {
    --- End diff --
    
    `Nullable` annotations are missing


> Cannot submit jobs from Web UI in FLIP-6 YARN Session 
> ------------------------------------------------------
>
>                 Key: FLINK-8776
>                 URL: https://issues.apache.org/jira/browse/FLINK-8776
>             Project: Flink
>          Issue Type: Bug
>          Components: Job-Submission, Webfrontend
>    Affects Versions: 1.5.0
>            Reporter: Gary Yao
>            Assignee: Gary Yao
>            Priority: Blocker
>              Labels: flip-6
>             Fix For: 1.5.0
>
>
> In YARN session mode the WebMonitorEndpoint listens on a random port. The 
> RestClusterClient used by the JarRunHandler is currently configured with the 
> reserved port 0 in YARN session mode. 



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