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From "Gabor Bota (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-16186) NPE in ITestS3AFileSystemContract teardown in DynamoDBMetadataStore.lambda$listChildren
Date Thu, 14 Mar 2019 17:38:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-16186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16792902#comment-16792902
] 

Gabor Bota commented on HADOOP-16186:
-------------------------------------

{quote}There's clearly some codepath which can surface which is causing failures in some situations,
and having multiple patches switching between the && and || operators isn't going
to to fix it
{quote}
You are right, but we need the find a way to reproduce it and write a test for it - find
that code path.

I cannot reproduce the issue simply by running the tests. 

> NPE in ITestS3AFileSystemContract teardown in  DynamoDBMetadataStore.lambda$listChildren
> ----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-16186
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16186
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.3.0
>            Reporter: Steve Loughran
>            Assignee: Gabor Bota
>            Priority: Major
>
> Test run options. NPE in test teardown
> {code}
> -Dparallel-tests -DtestsThreadCount=6 -Ds3guard -Ddynamodb
> {code}
> If you look at the code, its *exactly* the place fixed in HADOOP-15827, a change which
HADOOP-15947 reverted. 
> There's clearly some codepath which can surface which is causing failures in some situations,
and having multiple patches switching between the && and || operators isn't going
to to fix it



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