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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