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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2015/07/20 13:26:04 UTC

[jira] [Commented] (HADOOP-12251) FileStatus.hashCode is derived from mutable path field

    [ https://issues.apache.org/jira/browse/HADOOP-12251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14633441#comment-14633441 ] 

Steve Loughran commented on HADOOP-12251:
-----------------------------------------

HADOOP-6796 covered {{FileStatus.hashCode()}} NPE-ing if the path was null at the time of invocation. This issue doesn't look at that, only the adverse consequences of changing the hash code.

As FileStatus has to be writeable, the path value does have to be mutable. Which means it's probably impossible to fix this problem. 

Closing as a WONTFIX; leaving the issue in JIRA for people to find

> FileStatus.hashCode is derived from mutable path field
> ------------------------------------------------------
>
>                 Key: HADOOP-12251
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12251
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.7.1
>            Reporter: Steve Loughran
>            Priority: Minor
>             Fix For: 2.7.2
>
>
> The {{Filestatus.hashCode()}} operation uses the hash code from its path value. If the path is changed after insertion into any kind of hashmap, it won't be found.



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