ASF GitHub Bot commented on FLINK-3929:

Github user vijikarthi commented on the issue:

    @vijikarthi Thanks for the update. Great to see the tests are passing now. 
I'm curious, why did this issue only appear on Travis and not locally?
    Kafka/ZK connection is unusually longer in Travis and I don't know the 
reason? I have noticed a similar comment in the Kafka Test code too where we 
have changed the timeout from 6 sec (default) to 30 sec. I have increased the 
timeout interval further for the secure run since occasionally it fails with 
the lower timeout settings.
    The combination of longer ZK connection time and client code waiting for 
incorrect event (SysConnected) was the reason why in Travis it was failing.

> 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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