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https://issues.apache.org/jira/browse/HDFS-13661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16698100#comment-16698100
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Ayush Saxena commented on HDFS-13661:
-------------------------------------

Thanx [~tasanuma0829] for taking this Up.

IMO in case if the file system doesn't support EC we should return it back with 
an UnsupportedOperationException() rather than putting Replication in the the 
column(Replication is also considered a spl EC policy)

This could be misleading I guess.It will show up Replication there in the EC 
policy.It can develop a perspective that the FS supports EC.Which it doesn't 
actually.For all other EC operations it would be getting the exception only and 
I guess we should be inline with them. :) 

 

> Ls command with e option fails when the filesystem is not HDFS
> --------------------------------------------------------------
>
>                 Key: HDFS-13661
>                 URL: https://issues.apache.org/jira/browse/HDFS-13661
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: erasure-coding, tools
>    Affects Versions: 3.1.0, 3.0.3
>            Reporter: Takanobu Asanuma
>            Assignee: Takanobu Asanuma
>            Priority: Major
>         Attachments: HDFS-13661.1.patch
>
>
> {noformat}
> $ hadoop fs -ls -e file://
> Found 10 items
> -ls: Fatal internal error
> java.lang.NullPointerException
>       at org.apache.hadoop.fs.shell.Ls.adjustColumnWidths(Ls.java:308)
>       at org.apache.hadoop.fs.shell.Ls.processPaths(Ls.java:242)
>       at org.apache.hadoop.fs.shell.Command.recursePath(Command.java:387)
>       at org.apache.hadoop.fs.shell.Ls.processPathArgument(Ls.java:226)
>       at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:285)
>       at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:269)
>       at 
> org.apache.hadoop.fs.shell.FsCommand.processRawArguments(FsCommand.java:120)
>       at org.apache.hadoop.fs.shell.Command.run(Command.java:176)
>       at org.apache.hadoop.fs.FsShell.run(FsShell.java:328)
>       at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
>       at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
>       at org.apache.hadoop.fs.FsShell.main(FsShell.java:391)
> {noformat}



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