[jira] [Updated] (MAPREDUCE-5530) Binary and source incompatibility in mapred.lib.CombineFileInputFormat between branch-1 and branch-2

["Arun C Murthy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5530?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy updated MAPREDUCE-5530:
-------------------------------------

    Status: Open  (was: Patch Available)

> Binary and source incompatibility in mapred.lib.CombineFileInputFormat between branch-1 and branch-2
> ----------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5530
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5530
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv1, mrv2
>    Affects Versions: 2.1.1-beta
>            Reporter: Robert Kanter
>            Assignee: Robert Kanter
>            Priority: Blocker
>         Attachments: MAPREDUCE-5530.patch, MAPREDUCE-5530.patch
>
>
> {{mapred.lib.CombineFileInputFormat}} in branch-1 has this method:
> {code:java}
> protected boolean isSplitable(FileSystem fs, Path file)
> {code}
> In branch-2, {{mapred.lib.CombineFileInputFormat}} is now a subclass of {{mapreduce.lib.input.CombineFileInputFormat}}, from which it inherits the similar method:
> {code:java}
> protected boolean isSplitable(JobContext context, Path file)
> {code}
> This means that any code that subclasses {{mapred.lib.CombineFileInputFormat}} and does not provide its own implementation of {{protected boolean isSplitable(FileSystem fs, Path file)}} will not be binary or source compatible if it tries to call {{isSplitable}} with a {{FileSystem}} argument anywhere (that is, if compiled against branch-1, it will throw a {{NoSuchMethodError}} if run against branch-2; also, it won't even compile against branch-2).  



--
This message was sent by Atlassian JIRA
(v6.1#6144)