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https://issues.apache.org/jira/browse/HDFS-17848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDFS-17848:
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Labels: pull-request-available (was: )
> OIV should not use PrintStream
> ------------------------------
>
> Key: HDFS-17848
> URL: https://issues.apache.org/jira/browse/HDFS-17848
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: command
> Reporter: Tsz-wo Sze
> Priority: Major
> Labels: pull-request-available
>
> The problem reported by HDFS-17847 actually is due to the use of PrintStream
> in OIV.
> {quote}... Unlike other output streams, a PrintStream never throws an
> IOException; instead, exceptional situations merely set an internal flag that
> can be tested via the checkError method. ...
> {quote} - [https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html]
> As described in the javadoc above, PrintStream never throws an IOException.
> HDFS-17847 has proposed a quick fix by calling the checkError method.
> However, the checkError method does not tell the detail of the error.
> In the use case of OIV, it is better to use a class which throws IOException
> on failures. A potential replacement is
> [OutputStreamWriter|https://docs.oracle.com/javase/8/docs/api/java/io/OutputStreamWriter.html].
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