Hadoop QA commented on YARN-2936:

{color:red}-1 overall{color}.  Here are the results of testing the latest 
  against trunk revision 1454efe.

    {color:green}+1 @author{color}.  The patch does not contain any @author 

    {color:red}-1 tests included{color}.  The patch doesn't appear to include 
any new or modified tests.
                        Please justify why no new tests are needed for this 
                        Also please list what manual steps were performed to 
verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with 

    {color:green}+1 findbugs{color}.  The patch does not introduce any new 
Findbugs (version 2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in 

Test results: 
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/6198//console

This message is automatically generated.

> YARNDelegationTokenIdentifier doesn't set proto.builder now
> -----------------------------------------------------------
>                 Key: YARN-2936
>                 URL: https://issues.apache.org/jira/browse/YARN-2936
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Zhijie Shen
>            Assignee: Varun Saxena
>         Attachments: YARN-2936.001.patch, YARN-2936.002.patch
> After YARN-2743, the setters are removed from YARNDelegationTokenIdentifier, 
> such that when constructing a object which extends 
> YARNDelegationTokenIdentifier, proto.builder is not set at all. Later on, 
> when we call getProto() of it, we will just get an empty proto object.
> It seems to do no harm to the production code path, as we will always call 
> getBytes() before using proto to persist the DT in the state store, when we 
> generating the password.
> I think the setter is removed to avoid duplicating setting the fields why 
> getBytes() is called. However, YARNDelegationTokenIdentifier doesn't work 
> properly alone. YARNDelegationTokenIdentifier is tightly coupled with the 
> logic in secretManager. It's vulnerable if something is changed at 
> secretManager. For example, in the test case of YARN-2837, I spent time to 
> figure out we need to execute getBytes() first to make sure the testing DTs 
> can be properly put into the state store.

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