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https://issues.apache.org/jira/browse/HDFS-10757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15418422#comment-15418422
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Arun Suresh edited comment on HDFS-10757 at 8/12/16 6:37 AM:
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[~jnp],
> If the currentUGI has a realUgi, use the realUgi as actualUgi or use the
> currentUgi as the actualUgi
if currentUgi is a proxy user, the later case wont work... right ?
As Xiao commented, the actualUgi was added to support proxy users.
was (Author: asuresh):
[~jnp],
> If the currentUGI has a realUgi, use the realUgi as actualUgi or use the
> currentUgi as the actualUgi
if currentUgi is a proxy user, the later case wont wont.
As Xiao commented, the actualUgi was added to support proxy users.
> KMSClientProvider combined with KeyProviderCache can result in wrong UGI
> being used
> -----------------------------------------------------------------------------------
>
> Key: HDFS-10757
> URL: https://issues.apache.org/jira/browse/HDFS-10757
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Priority: Critical
>
> ClientContext::get gets the context from CACHE via a config setting based
> name, then KeyProviderCache stored in ClientContext gets the key provider
> cached by URI from the configuration, too. These would return the same
> KeyProvider regardless of current UGI.
> KMSClientProvider caches the UGI (actualUgi) in ctor; that means in
> particular that all the users of DFS with KMSClientProvider in a process will
> get the KMS token (along with other credentials) of the first user, via the
> above cache.
> Either KMSClientProvider shouldn't store the UGI, or one of the caches should
> be UGI-aware, like the FS object cache.
> Side note: the comment in createConnection that purports to handle the
> different UGI doesn't seem to cover what it says it covers. In our case, we
> have two unrelated UGIs with no auth (createRemoteUser) with bunch of tokens,
> including a KMS token, added.
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