simbadzina opened a new pull request, #5346:
URL: https://github.com/apache/hadoop/pull/5346
HDFS-16901: RBF: Propagates real user's username via the caller context,
when a proxy user is being used.
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### Description of PR
If the router receives an operation from a proxyUser, it drops the realUser
in the UGI and makes the routerUser the realUser for the operation that goes to
the namenode.
In the namenode UGI logs, we'd like the ability to know the original
realUser.
The router should propagate the realUser from the client call as part of the
callerContext.
### How was this patch tested?
New test case : **TestRouterRpc#testRealUserPropagationInCallerContext**
### For code changes:
- [ X] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
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