[jira] [Created] (YARN-7131) FSDownload.unpack should read determine the type of resource by reading the header bytes

["Brook Zhou (JIRA)" <ji...@apache.org>]

Brook Zhou created YARN-7131:
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             Summary: FSDownload.unpack should read determine the type of resource by reading the header bytes
                 Key: YARN-7131
                 URL: https://issues.apache.org/jira/browse/YARN-7131
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Brook Zhou
            Assignee: Brook Zhou


Currently, there are naive string checks to determine if a resource of a particular type (jar, zip, tar.gz) 

There can be cases where this does not work - e.g., the user decides to split up a large zip resource as {file1}.zip.001, {file1}.zip.002.

Instead, FSDownload.unpack should read the file header bytes to determine the file type.



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