Joe McDonnell created IMPALA-10044:
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             Summary: bin/bootstrap_toolchain.py error handling can delete the 
toolchain directory
                 Key: IMPALA-10044
                 URL: https://issues.apache.org/jira/browse/IMPALA-10044
             Project: IMPALA
          Issue Type: Bug
          Components: Infrastructure
    Affects Versions: Impala 4.0
            Reporter: Joe McDonnell


In bin/bootstrap_toolchain.py's DownloadUnpackTarball download() function, the 
exception handler code will delete the download directory:
{code:java}
    except:  # noqa
      # Clean up any partially-unpacked result.
      if os.path.isdir(unpack_dir):
        shutil.rmtree(unpack_dir)
      if os.path.isdir(download_dir): # <---- wrong
        shutil.rmtree(download_dir)
      raise
{code}
This is incorrect. It should only delete the download directory if the download 
directory is a temporary directory. Otherwise, it would be deleting the actual 
toolchain directory (and forcing a redownload of everything).



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