Joel Koshy resolved KAFKA-4025.
       Resolution: Fixed
         Assignee: radai rosenblatt
         Reviewer: Joel Koshy
    Fix Version/s:

> build fails on windows due to rat target output encoding
> --------------------------------------------------------
>                 Key: KAFKA-4025
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4025
>             Project: Kafka
>          Issue Type: Bug
>         Environment: windows 7, either regular command prompt or git bash
>            Reporter: radai rosenblatt
>            Assignee: radai rosenblatt
>            Priority: Minor
>             Fix For:
>         Attachments: windows build debug output.txt
> kafka runs a rat report during the build, using [the rat ant report 
> task|http://creadur.apache.org/rat/apache-rat-tasks/report.html], which has 
> no output encoding parameter.
> this means that the resulting xml report is produced using the system-default 
> encoding, which is OS-dependent:
> the rat ant task code instantiates the output writer like so 
> ([org.apache.rat.anttasks.Report.java|http://svn.apache.org/repos/asf/creadur/rat/tags/apache-rat-project-0.11/apache-rat-tasks/src/main/java/org/apache/rat/anttasks/Report.java]
>  line 196):
> {noformat}
> out = new PrintWriter(new FileWriter(reportFile));{noformat}
> which eventually leads to {{Charset.defaultCharset()}} that relies on the 
> file.encoding system property. this causes an issue if the default encoding 
> isnt UTF-8 (which it isnt on windows) as the code called by 
> printUnknownFiles() in rat.gradle defaults to UTF-8 when reading the report 
> xml, causing the build to fail with:
> {noformat}
> com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 
> Invalid byte 1 of 1-byte UTF-8 sequence.{noformat}
> (see complete output of {{gradlew --debug --stacktrace rat}} in attached file)

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