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https://issues.apache.org/jira/browse/FLINK-4058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15325361#comment-15325361
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Stephan Ewen commented on FLINK-4058:
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That makes complete sense, thanks for the report and diagnosis.
Do you want to open a pull request with a fix?
> Error uploading JAR with dependencies using flink.bat on a Windows
> stand-alone instance
> ---------------------------------------------------------------------------------------
>
> Key: FLINK-4058
> URL: https://issues.apache.org/jira/browse/FLINK-4058
> Project: Flink
> Issue Type: Bug
> Reporter: Mark Nadelson
> Priority: Critical
>
> Uploading a JAR with dependencies in a sub-directory causes an" Unable to
> create temporary file" IOException. This occurs in
> org.apache.flink.client.program.PackagedProgram.extractContainedLibraries()
> This because of the line "name = name.replace(File.separatorChar, '_');"
> File.separatorChar in windows is the backslash (\) but files read from a Jar
> are always in the format of the forward slash (/). Therefore the slash is
> never replaced with the '_'. The fix is to remove the File.separatorChar
> with '/'.
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