[GitHub] [spark] dongjoon-hyun commented on a change in pull request #25226: [SPARK-28468][INFRA] Update pip to fix `sphinx` import error

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dongjoon-hyun commented on a change in pull request #25226: [SPARK-28468][INFRA] Update pip to fix `sphinx` import error
URL: https://github.com/apache/spark/pull/25226#discussion_r305688340
 
 

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 File path: dev/create-release/spark-rm/Dockerfile
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 @@ -60,6 +60,7 @@ RUN apt-get clean && apt-get update && $APT_INSTALL gnupg ca-certificates apt-tr
   $APT_INSTALL nodejs && \
   # Install needed python packages. Use pip for installing packages (for consistency).
   $APT_INSTALL libpython2.7-dev libpython3-dev python-pip python3-pip && \
+  pip install --upgrade pip && hash -r pip && \
 
 Review comment:
   `hash -r pip` is also required. Without that, we will hit the following.
   ```
   Traceback (most recent call last):
     File "/usr/bin/pip", line 9, in <module>
       from pip import main
   ImportError: cannot import name main
   ```

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