[jira] [Updated] (YARN-2484) FileSystemRMStateStore#readFile/writeFile should close FSData(In|Out)putStream in final block

["Tsuyoshi OZAWA (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-2484?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsuyoshi OZAWA updated YARN-2484:
---------------------------------

    Attachment: YARN-2484.1.patch

In this case, we should use close() methods directory instead of IOUtils, because exceptions in close methods should not be ignored. 

> FileSystemRMStateStore#readFile/writeFile should close FSData(In|Out)putStream in final block
> ---------------------------------------------------------------------------------------------
>
>                 Key: YARN-2484
>                 URL: https://issues.apache.org/jira/browse/YARN-2484
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>            Priority: Trivial
>         Attachments: YARN-2484.1.patch
>
>
> File descriptors can leak if exceptions are thrown in these methods.
> {code}
>  private byte[] readFile(Path inputPath, long len) throws Exception {
>     FSDataInputStream fsIn = fs.open(inputPath);
>     // state data will not be that "long"
>     byte[] data = new byte[(int)len];
>     fsIn.readFully(data);
>     fsIn.close();
>     return data;
>   }
> {code}
> {code}
>   private void writeFile(Path outputPath, byte[] data) throws Exception {
>     Path tempPath =
>         new Path(outputPath.getParent(), outputPath.getName() + ".tmp");
>     FSDataOutputStream fsOut = null;
>     // This file will be overwritten when app/attempt finishes for saving the
>     // final status.
>     fsOut = fs.create(tempPath, true);
>     fsOut.write(data);
>     fsOut.close();
>     fs.rename(tempPath, outputPath);
>   }
> {code}



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