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Posted to common-issues@hadoop.apache.org by "Chris Nauroth (JIRA)" <ji...@apache.org> on 2015/01/30 18:41:34 UTC

[jira] [Created] (HADOOP-11527) Support ServiceLoader mechanism for finding subclasses of AbstractFileSystem.

Chris Nauroth created HADOOP-11527:
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             Summary: Support ServiceLoader mechanism for finding subclasses of AbstractFileSystem.
                 Key: HADOOP-11527
                 URL: https://issues.apache.org/jira/browse/HADOOP-11527
             Project: Hadoop Common
          Issue Type: Improvement
          Components: fs
            Reporter: Chris Nauroth


Currently, Hadoop code can discover custom implementations of {{FileSystem}} via either configuration mapping the scheme to the class name or the Java {{ServiceLoader}} mechanism.  However, for implementations of {{AbstractFileSystem}}, only configuration is supported and not the {{ServiceLoader}} mechanism.  Because of this, we must either specify the classes in core-default.xml (which is somewhat unusual because the class is likely to be in a hadoop-tools module instead of hadoop-common) or ask users to set it in core-site.xml at deployment time.  This issue proposes to implement the {{ServiceLoader}} mechanism for {{AbstractFileSystem}}.



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