Steve Loughran created HADOOP-9497:
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Summary: FileSystem.createFileSystem to convert class
instantiation problems to meaningful IOEs
Key: HADOOP-9497
URL: https://issues.apache.org/jira/browse/HADOOP-9497
Project: Hadoop Common
Issue Type: Improvement
Components: fs
Reporter: Steve Loughran
Priority: Minor
{{FileSystem.createFileSystem()}} uses {{ReflectionUtils()}} to instantiate a
class -which converts all instantiation-related problems to
{{RuntimeException}}.
It would be better to
# Catch these in {{FileSystem.createFileSystem()}} and convert to an IOE with
some useful message, such as {{"Could not create a FS instance for hdfs://...
and class org.apache.hadoop.fs.hdfs.DfsClient : ClassNotFoundException}}.
# Maybe even allow for a conf option for filesystem implementations to provide
an actionable message, such as "make sure that hadoop-hdfs is on the classpath"
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