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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10722) Fix race condition in TestEditLog#testBatchedSyncWithClosedLogs
Date Thu, 04 Aug 2016 16:53:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15408108#comment-15408108
] 

Kihwal Lee commented on HDFS-10722:
-----------------------------------

+1

> Fix race condition in TestEditLog#testBatchedSyncWithClosedLogs
> ---------------------------------------------------------------
>
>                 Key: HDFS-10722
>                 URL: https://issues.apache.org/jira/browse/HDFS-10722
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: HDFS-10722.patch
>
>
> The test may fail the following assertion if async edit logs are enabled:
> {{logging edit without syncing should do not affect txid expected:<1> but was:<2>}}.
 The async thread is doing batched syncs in the background.  logSync just ensures the edit
is durable, so the txid may increase prior to sync.  It's a race.



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