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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GEARPUMP-355) AppMasterResolver fails to run against a kerberized Hadoop cluster
Date Fri, 20 Oct 2017 08:18:00 GMT

    [ https://issues.apache.org/jira/browse/GEARPUMP-355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16212339#comment-16212339
] 

ASF GitHub Bot commented on GEARPUMP-355:
-----------------------------------------

Github user huafengw commented on the issue:

    https://github.com/apache/incubator-gearpump/pull/231
  
    I've tested the pr and no regression was found. 
    But it seems this change introduces some unused imports to the affected files. We'll merge
it once they were resolved. @titikakatoo 


> AppMasterResolver fails to run against a kerberized Hadoop cluster
> ------------------------------------------------------------------
>
>                 Key: GEARPUMP-355
>                 URL: https://issues.apache.org/jira/browse/GEARPUMP-355
>             Project: Apache Gearpump
>          Issue Type: Bug
>          Components: security, yarn
>    Affects Versions: 0.8.4
>            Reporter: Timea Magyar
>             Fix For: 0.8.4
>
>
> When trying to launch a Gearpump cluster in a kerberized Hadoop/Yarn environment, after
the Application Master address has been resolved as a prerequisite, the YarnAppMaster (responsible
for starting GearPump masters, workers, UI servers as Yarn containers) address (actor reference)
must be obtained via Kerberos/Spnego. (Kerberos over http)
> The current implementation for this resides in the AppMasterResolver class and is using
an apache http client (version 3.x) for establishing a connection to the Application Master
and obtain the above YarnAppMaster actor reference. Since the apache http client does not
support the negotiate authentication scheme in version 3.x (required for a connection over
kerberos/spnego) this step will always fail in a kerberized Yarn/Hadoop cluster set-up.
> I tested this in a secured/kerberized CDH 5.7.5 environment.  I would like to provide
a patch for this  by adapting the SPNEGO-enabled Hadoop web connection code from WebHDFS.



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