Contracts of LocalFileSystem and DistributedFileSystem should require
FileSystem::listStatus throw IOException not return null upon access error
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Key: HADOOP-7352
URL: https://issues.apache.org/jira/browse/HADOOP-7352
Project: Hadoop Common
Issue Type: Improvement
Components: fs, fs/s3
Reporter: Matt Foley
Assignee: Matt Foley
In HADOOP-6201 and HDFS-538 it was agreed that FileSystem::listStatus should
throw FileNotFoundException instead of returning null, when the target
directory did not exist.
However, in LocalFileSystem implementation today, FileSystem::listStatus still
may return null, when the target directory exists but does not grant read
permission. This causes NPE in many callers, for all the reasons cited in
HADOOP-6201 and HDFS-538. See HADOOP-7327 and its linked issues for examples.
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