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From "Greg Phillips (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5280) Allow YARN containers to run with Java Security Manager
Date Mon, 27 Feb 2017 01:54:45 GMT

    [ https://issues.apache.org/jira/browse/YARN-5280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15885022#comment-15885022
] 

Greg Phillips commented on YARN-5280:
-------------------------------------

[~rkanter] I tested {{TestContainerManagerSecurity}} with and without 008 and they each failed
~70% of the time (across ~20 runs each).  There seems to be a race condition introduced in
YARN-2584.  
{code:title=TestContainerManagerSecurity.java}
    while ((interval-- > 0)
        && !nmContet.getContainers().get(containerId)
          .cloneAndGetContainerStatus().getState()
          .equals(ContainerState.COMPLETE)) {
{code}

The {{nmContet.getContainers().get(containerId)}} can return null.  It seems the race is between
the container being set to complete and it being completely removed from the Map.  In any
case it seems to be unrelated to YARN-5280, I will open another ticket to address this issue
if you agree.

> Allow YARN containers to run with Java Security Manager
> -------------------------------------------------------
>
>                 Key: YARN-5280
>                 URL: https://issues.apache.org/jira/browse/YARN-5280
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: nodemanager, yarn
>    Affects Versions: 2.6.4
>            Reporter: Greg Phillips
>            Assignee: Greg Phillips
>            Priority: Minor
>              Labels: oct16-medium
>         Attachments: YARN-5280.001.patch, YARN-5280.002.patch, YARN-5280.003.patch, YARN-5280.004.patch,
YARN-5280.005.patch, YARN-5280.006.patch, YARN-5280.007.patch, YARN-5280.008.patch, YARN-5280.patch,
YARNContainerSandbox.pdf
>
>
> YARN applications have the ability to perform privileged actions which have the potential
to add instability into the cluster. The Java Security Manager can be used to prevent users
from running privileged actions while still allowing their core data processing use cases.

> Introduce a YARN flag which will allow a Hadoop administrator to enable the Java Security
Manager for user code, while still providing complete permissions to core Hadoop libraries.



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