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From "Remko Popma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-514) ConsoleAppender closing System.out on Windows
Date Fri, 11 Jul 2014 07:32:04 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14058513#comment-14058513
] 

Remko Popma commented on LOG4J2-514:
------------------------------------

Based on the code in trunk for OutputStreamManager, this is still an issue in rc2.

> ConsoleAppender closing System.out on Windows
> ---------------------------------------------
>
>                 Key: LOG4J2-514
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-514
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Appenders
>    Affects Versions: 2.0-beta9
>         Environment: Windows 7 64-bit
> Oracle JDK 1.7.0_51
>            Reporter: Wolf480 Pl
>         Attachments: LOG4J2-514.patch.txt
>
>
> If the Console appender is not specified in the configuration file, after the configuration
is read, the Console appender is being destroyed, which causes it to release its OutputStreamManager,
When this manager is released and closed, it checks if the stream is System.out or System.err,
and if it is, doesn't close it. But on Windows, ConsoleAppender wraps the System.out into
a WindowsAnsiOutputStream. The OutputStreamManager closes the stream when it's released, and
the stream closes the underlaying System.out.
> proof: http://imageshack.com/a/img31/8296/cg6b.png
> -I think the easiest solution would be to use new FileOutputStream(FileDescriptor.out))
instead of System.out in ConsoleAppender implementation.- unfortunately, that would still
cause System.out to be closed.
> A solution would be to wrap System.out with some FilterStream that overrides close()
to do nothing.



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