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

    https://github.com/apache/flink/pull/1202#discussion_r41272107
  
    --- Diff: 
flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/JobManagerArchiveRetriever.java
 ---
    @@ -47,51 +60,160 @@
        private final FiniteDuration timeout;
        private final WebMonitor webMonitor;
     
    +   /** Pattern to extract the host from an remote Akka URL */
    +   private final Pattern hostFromLeaderAddressPattern = 
Pattern.compile("^.+@(.+):([0-9]+)/user/.+$");
    +
    +   /** The JobManager Akka URL associated with this JobManager */
    +   private volatile String jobManagerAkkaUrl;
    +
        /** will be written and read concurrently */
        private volatile ActorGateway jobManagerGateway;
        private volatile ActorGateway archiveGateway;
    +   private volatile String redirectWebMonitorAddress;
     
        public JobManagerArchiveRetriever(
                        WebMonitor webMonitor,
                        ActorSystem actorSystem,
                        FiniteDuration lookupTimeout,
                        FiniteDuration timeout) {
    -           this.webMonitor = webMonitor;
    -           this.actorSystem = actorSystem;
    -           this.lookupTimeout = lookupTimeout;
    -           this.timeout = timeout;
    +
    +           this.webMonitor = checkNotNull(webMonitor);
    +           this.actorSystem = checkNotNull(actorSystem);
    +           this.lookupTimeout = checkNotNull(lookupTimeout);
    +           this.timeout = checkNotNull(timeout);
    +   }
    +
    +   /**
    +    * Associates this instance with the job manager identified by the 
given URL.
    +    *
    +    * <p>This has to match the URL retrieved by the leader retrieval 
service. In tests setups you
    +    * have to make sure to use the correct type of URLs.
    +    */
    +   public void setJobManagerAkkaUrlAndRetrieveGateway(String 
jobManagerAkkaUrl) throws Exception {
    --- End diff --
    
    Actually, I meant to get rid of this extra redirect logic here.


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