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From "Gera Shegalov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-7747) YARN UI is broken in the minicluster
Date Sun, 14 Jan 2018 02:52:00 GMT
Gera Shegalov created YARN-7747:

             Summary: YARN UI is broken in the minicluster 
                 Key: YARN-7747
                 URL: https://issues.apache.org/jira/browse/YARN-7747
             Project: Hadoop YARN
          Issue Type: Bug
    Affects Versions: 3.0.0
            Reporter: Gera Shegalov
            Assignee: Gera Shegalov

YARN web apps use non-injected instances of GuiceFilter, i.e. instances created by Jetty as
opposed by Guice itself. This triggers the [call path|https://github.com/google/guice/blob/master/extensions/servlet/src/com/google/inject/servlet/GuiceFilter.java#L251]
where the static field {{pipeline}} is used instead of the instance field {{injectedPipeline}}.
However, besides GuiceFilter instances created by Jetty, each Guice module generates them
as well. On the injection call path this static variable is updated by each instance. Thus
if there are multiple modules as it happens to be the case in the minicluster the one loaded
last ends up defining the filter pipeline for all Jetty instances. In the minicluster case
this is the nodemanager UI

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