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https://issues.apache.org/jira/browse/FLINK-3929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15496152#comment-15496152
 ] 

ASF GitHub Bot commented on FLINK-3929:
---------------------------------------

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

    https://github.com/apache/flink/pull/2275#discussion_r79153661
  
    --- Diff: 
flink-streaming-connectors/flink-connector-kafka-0.9/src/test/java/org/apache/flink/streaming/connectors/kafka/KafkaTestEnvironmentImpl.java
 ---
    @@ -266,23 +268,37 @@ public void createTestTopic(String topic, int 
numberOfPartitions, int replicatio
                        zkUtils.close();
                }
     
    +           LOG.info("Topic {} create request is successfully posted", 
topic);
    +
                // validate that the topic has been created
    -           final long deadline = System.currentTimeMillis() + 30000;
    +           final long deadline = System.currentTimeMillis() + 
Integer.parseInt(zkTimeout);
                do {
                        try {
    -                           Thread.sleep(100);
    +                           if(secureMode) {
    +                                   //increase wait time since in Travis ZK 
timeout occurs frequently
    +                                   int wait = Integer.parseInt(zkTimeout) 
/ 100;
    +                                   LOG.info("waiting for {} msecs before 
the topic {} can be checked", wait, topic);
    +                                   Thread.sleep(wait);
    +                           } else {
    +                                   Thread.sleep(100);
    --- End diff --
    
    I would rather retry here instead of waiting.


> Support for Kerberos Authentication with Keytab Credential
> ----------------------------------------------------------
>
>                 Key: FLINK-3929
>                 URL: https://issues.apache.org/jira/browse/FLINK-3929
>             Project: Flink
>          Issue Type: New Feature
>            Reporter: Eron Wright 
>            Assignee: Vijay Srinivasaraghavan
>              Labels: kerberos, security
>   Original Estimate: 672h
>  Remaining Estimate: 672h
>
> _This issue is part of a series of improvements detailed in the [Secure Data 
> Access|https://docs.google.com/document/d/1-GQB6uVOyoaXGwtqwqLV8BHDxWiMO2WnVzBoJ8oPaAs/edit?usp=sharing]
>  design doc._
> Add support for a keytab credential to be associated with the Flink cluster, 
> to facilitate:
> - Kerberos-authenticated data access for connectors
> - Kerberos-authenticated ZooKeeper access
> Support both the standalone and YARN deployment modes.
>  



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