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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15679) ShutdownHookManager shutdown time needs to be configurable & extended
Date Thu, 16 Aug 2018 05:15:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16581969#comment-16581969
] 

Steve Loughran commented on HADOOP-15679:
-----------------------------------------

one little detail, shutdown hook manager doesn't take a configuration, so not obvious where
to pick up that option. I'm going to have it create a {{new Configuration(true)}} instance
to pick up core-default & core-site; make the code to extract the config static and package
private for testing

> ShutdownHookManager shutdown time needs to be configurable & extended
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-15679
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15679
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 2.8.0, 3.0.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Major
>
> HADOOP-12950 added a timeout on shutdowns to avoid problems with hanging shutdowns. But
the timeout is too short for applications where a large flush of data is needed on shutdown.
> A key example of this is Spark apps which save their history to object stores, where
the file close() call triggers an upload of the final local cached block of data (could be
32+MB), and then execute the final mutipart commit.
> Proposed
> # make the default sleep time 30s, not 10s
> # make it configurable with a time duration property (with minimum time of 1s.?)



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