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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/61734/
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Review request for oozie, Peter Cseh, Peter Bacsko, and Robert Kanter.


Repository: oozie-git


Description
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In a secure environment, when both HDFS HA and log aggregation are turned on, 
`JavaActionExecutor` is not able to call `YarnClient#submitApplication` since 
`HDFS_DELEGATION_TOKEN` is missing.

In those cases we need to get `HDFS_DELEGATION_TOKEN` from YARN:

* get server principal / YARN renewer via 
`HadoopAccessorService#getServerPrincipal`
* get `HDFS_DELEGATION_TOKEN` via `DFSClient#getDelegationToken`
* add `HDFS_DELEGATION_TOKEN` to `Credentials`


Diffs
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  core/src/main/java/org/apache/oozie/action/hadoop/JavaActionExecutor.java 
dc17950418ada9b4848ed5597702a29e7124ab38 
  core/src/main/java/org/apache/oozie/service/HadoopAccessorService.java 
b507c79d44aa2095caf532a5f4d19d20c1a30630 


Diff: https://reviews.apache.org/r/61734/diff/1/


Testing
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`TestJavaActionExecutor`, `TestHadoopAccessorService`


Thanks,

András Piros

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