[jira] Updated: (HADOOP-2998) Calling DFSClient.close() should not throw IOException when it is already closed.

["Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo (Nicholas), SZE updated HADOOP-2998:
-------------------------------------------

    Summary: Calling DFSClient.close() should not throw IOException when it is already closed.  (was: Calling DFSClient.close() should not throw IOException.)

> Calling DFSClient.close() should not throw IOException when it is already closed.
> ---------------------------------------------------------------------------------
>
>                 Key: HADOOP-2998
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2998
>             Project: Hadoop Core
>          Issue Type: Bug
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>
> In Java, if a stream is opened, it can be closed for more than one times without any exception.  For example,
> {code}
> OutputStream out = ...;
> ...
> out.close();
> out.close(); //no exception thrown here
> {code}
> So, DFSClient.close() should also do the same.

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