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From "Zhiyuan Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5436) Race in AsyncDispatcher can cause random test failures in Tez(probably YARN also )
Date Wed, 27 Jul 2016 20:06:20 GMT

     [ https://issues.apache.org/jira/browse/YARN-5436?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhiyuan Yang updated YARN-5436:
-------------------------------
    Description: In YARN-2264, a race in DrainDispatcher was fixed. Unfortunately, it also
exists in AsyncDispatcher (this was found and ignored in YARN-3878 but never documented...).
In YARN-2991, another DrainDispatcher bug was fixed by letting DrainDispatcher reuse some
AsyncDispatcher method because AsyncDispatcher doesn't have such issue. However, this shadows
YARN-2264, and now similar race reappears in Tez unit tests (probably also YARN unit tests
also).  (was: In YARN-2264, a race in DrainDispatcher was fixed. Unfortunately, it also exists
in AsyncDispatcher but wasn't found. In YARN-2991, another DrainDispatcher bug was fixed by
letting DrainDispatcher reuse some AsyncDispatcher method because AsyncDispatcher doesn't
have such issue. However, this shadows YARN-2264, and now similar race reappears in Tez unit
tests (probably also YARN unit tests also).)

> Race in AsyncDispatcher can cause random test failures in Tez(probably YARN also )
> ----------------------------------------------------------------------------------
>
>                 Key: YARN-5436
>                 URL: https://issues.apache.org/jira/browse/YARN-5436
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Zhiyuan Yang
>            Assignee: Zhiyuan Yang
>
> In YARN-2264, a race in DrainDispatcher was fixed. Unfortunately, it also exists in AsyncDispatcher
(this was found and ignored in YARN-3878 but never documented...). In YARN-2991, another DrainDispatcher
bug was fixed by letting DrainDispatcher reuse some AsyncDispatcher method because AsyncDispatcher
doesn't have such issue. However, this shadows YARN-2264, and now similar race reappears in
Tez unit tests (probably also YARN unit tests also).



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