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https://issues.apache.org/jira/browse/HDFS-5546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lei (Eddy) Xu updated HDFS-5546:
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Attachment: HDFS-5546.2.001.patch
Hey [~cmccabe] This patch includes a unit test that deletes a fraction of
sub-directories in the middle of listing the parent directory. In the end, this
patch verifies the rest of the directory are finished even there is one or more
FNF in the process.
> race condition crashes "hadoop ls -R" when directories are moved/removed
> ------------------------------------------------------------------------
>
> Key: HDFS-5546
> URL: https://issues.apache.org/jira/browse/HDFS-5546
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.2.0
> Reporter: Colin Patrick McCabe
> Assignee: Kousuke Saruta
> Priority: Minor
> Attachments: HDFS-5546.1.patch, HDFS-5546.2.000.patch,
> HDFS-5546.2.001.patch
>
>
> This seems to be a rare race condition where we have a sequence of events
> like this:
> 1. org.apache.hadoop.shell.Ls calls DFS#getFileStatus on directory D.
> 2. someone deletes or moves directory D
> 3. org.apache.hadoop.shell.Ls calls PathData#getDirectoryContents(D), which
> calls DFS#listStatus(D). This throws FileNotFoundException.
> 4. ls command terminates with FNF
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