[jira] Updated: (HADOOP-4225) FSEditLog logs modification time instead of access time.

["Konstantin Shvachko (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-4225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Shvachko updated HADOOP-4225:
----------------------------------------

    Attachment: LogATime.patch

I am not arguing about the semantics of the access time field, I am saying that when saving it into the edits log you should save exactly that field rather than another one.
So, if you want to set accessTime to the value of the modificationTime you assign that value to that field. But when you serialize accessTime in {{logOpenFile()}} to the disk you should serialize that field rather than something else. I cannot even understand which of them (the first or the second) corresponds to which time until I look at the loading code.
This is what I mean.

> FSEditLog logs modification time instead of access time.
> --------------------------------------------------------
>
>                 Key: HADOOP-4225
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4225
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.19.0
>            Reporter: Konstantin Shvachko
>            Priority: Blocker
>             Fix For: 0.19.0
>
>         Attachments: LogATime.patch
>
>
> ((FSEditLog.logOpenFile()}} does not persist accessTime but modificationTime instead. Should be {{getAccessTime()}}.
> Introduced in HADOOP-1869.

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