Steve Loughran created HADOOP-13605:
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Summary: Clean up FileSystem javadocs, logging; improve
diagnostics on FS load
Key: HADOOP-13605
URL: https://issues.apache.org/jira/browse/HADOOP-13605
Project: Hadoop Common
Issue Type: Improvement
Components: fs
Affects Versions: 2.8.0
Reporter: Steve Loughran
Assignee: Steve Loughran
We can't easily debug FS instantiation problems as there isn't much detail in
what was going on.
We can add more logging, but cannot simply switch {{FileSystem.LOG}} to SLF4J
—the class is used in too many places, including tests which cast it. Instead,
add a new private SLF4J Logger, {{LOGGER}} and switch logging to it.
While working in the base FileSystem class, take the opportunity to clean up
javadocs and comments
# add the list of exceptions, including indicating which base classes throw
UnsupportedOperationExceptions
# cut bits in the comments which are not true
The outcome of this patch is that IDEs shouldn't highlight most of the file as
flawed in some way or another
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