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Posted to common-issues@hadoop.apache.org by "Alejandro Abdelnur (Updated) (JIRA)" <ji...@apache.org> on 2012/02/14 19:12:00 UTC

[jira] [Updated] (HADOOP-7549) Use JDK ServiceLoader mechanism to find FileSystem implementations

     [ https://issues.apache.org/jira/browse/HADOOP-7549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alejandro Abdelnur updated HADOOP-7549:
---------------------------------------

    Attachment: HADOOP-7549v2.patch

Patch rebased to trunk.

It keeps current mappings in the services definition (it was been done already).

Definition in configuration overrides a service definition (it was been done already).

It removes the deprecated warning log when resolving a FS implementation from configuration as this is the way of overriding an implementation, thus it is not deprecated.

It adds HAR and WebHdfs filesystems to the service loading mechanism/definitions.



                
> Use JDK ServiceLoader mechanism to find FileSystem implementations
> ------------------------------------------------------------------
>
>                 Key: HADOOP-7549
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7549
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 0.23.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 0.24.0
>
>         Attachments: HADOOP-7549v1.patch, HADOOP-7549v2.patch
>
>
> Currently configuring FileSystem implementations must be done by declaring the FileSystem class in the Hadoop configuration files (core-default.xml, ...).
> Using JDK ServiceLoader mechanism this configuration step can be avoided. Adding the JAR file with the additional FileSystem implementation would suffice. 
> This is similar to what is being proposed for compression codecs (HADOOP-7350).

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