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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2015/05/29 14:14:19 UTC

[jira] [Commented] (HADOOP-11684) S3a to use thread pool that blocks clients

    [ https://issues.apache.org/jira/browse/HADOOP-11684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14564687#comment-14564687 ] 

Steve Loughran commented on HADOOP-11684:
-----------------------------------------

Thomas, could you split the POM patch from the rest of the change. That way it is more visible in CHANGES.TXT and something we can link to from HADOOP-9991, the general JIRA to track updates. 

> S3a to use thread pool that blocks clients
> ------------------------------------------
>
>                 Key: HADOOP-11684
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11684
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.7.0
>            Reporter: Thomas Demoor
>            Assignee: Thomas Demoor
>         Attachments: HADOOP-11684-001.patch
>
>
> Currently, if fs.s3a.max.total.tasks are queued and another (part)upload wants to start, a RejectedExecutionException is thrown. 
> We should use a threadpool that blocks clients, nicely throtthling them, rather than throwing an exception. F.i. something similar to https://github.com/apache/incubator-s4/blob/master/subprojects/s4-comm/src/main/java/org/apache/s4/comm/staging/BlockingThreadPoolExecutorService.java



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