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https://issues.apache.org/jira/browse/HADOOP-7549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13095497#comment-13095497
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Suresh Srinivas commented on HADOOP-7549:
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bq. "file" scheme to point to RawLocalFileSystem, "checksum" scheme to point to
LocalFileSystem
This is backward incompatible. We should retain the definitions that are in
core-default.xml for mapping scheme to a file system. By that definition,
scheme "file" should map to LocalFileSystem. I am fine moving current schemes
from configuration file to ServiceLoader based mechanism.
We should also retain the configuration based mechanism. This as I indicated
earlier, gives flexibility during run time to override a scheme to a different
file system mapping.
> 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: 0.23.0
>
> Attachments: HADOOP-7549v1.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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