[jira] [Comment Edited] (HADOOP-7352) FileSystem#listStatus should throw IOE upon access error

["John Zhuge (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-7352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15475009#comment-15475009 ] 

John Zhuge edited comment on HADOOP-7352 at 9/8/16 9:25 PM:
------------------------------------------------------------

Globber has its own version of {{listStatus}} which converts IOE to empty array:
{code}
  private FileStatus[] listStatus(Path path) throws IOException {
    try {
      if (fs != null) {
        return fs.listStatus(path);
      } else {
        return fc.util().listStatus(path);
      }
    } catch (FileNotFoundException e) {
      return new FileStatus[0];
    }
  }
{code}



was (Author: jzhuge):
Globber has its own version of {{listStatus}} which converts IOE to empty array:
{code}
  private FileStatus[] listStatus(Path path) throws IOException {
    try {
      if (fs != null) {
        return fs.listStatus(path);
      } else {
        return fc.util().listStatus(path);
      }
    } catch (IOException e) {
      return new FileStatus[0];
    }
  }
{code}


> FileSystem#listStatus should throw IOE upon access error
> --------------------------------------------------------
>
>                 Key: HADOOP-7352
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7352
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 2.6.0
>            Reporter: Matt Foley
>            Assignee: John Zhuge
>         Attachments: HADOOP-7352.001.patch
>
>
> 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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