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Posted to common-issues@hadoop.apache.org by "Jim Brennan (Jira)" <ji...@apache.org> on 2020/12/11 21:40:00 UTC

[jira] [Resolved] (HADOOP-17417) Reduce UGI overhead in token ops

     [ https://issues.apache.org/jira/browse/HADOOP-17417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jim Brennan resolved HADOOP-17417.
----------------------------------
    Resolution: Later

This needs to be done as part of a larger feature that we are not ready to put up yet.

 

> Reduce UGI overhead in token ops 
> ---------------------------------
>
>                 Key: HADOOP-17417
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17417
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: common, kms, performance, rpc-server, security
>            Reporter: Ahmed Hussein
>            Assignee: Ahmed Hussein
>            Priority: Major
>
> {{DelegationTokenIdentifier}} has a {{ugiCache}} but  AbstractDelegationTokenManager calls a static method {{getRemoteUser()}} which would bypass the cache.
> Performance analysis of the KMS revealed the RPC server layer is creating many and redundant UGI instances.. UGIs are not cheap to instantiate, require synchronization, and waste memory. Reducing instantiations will improve the performance of the ipc readers.
>  
>  



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