martin-g commented on pull request #4238:
URL: https://github.com/apache/zeppelin/pull/4238#issuecomment-933466802


   > We can reactivate travis-ci for ARM builds as long as they are free.
   
   It is free! 
   I've already started reviving .travis.yml from `branch-0.9` 
(https://github.com/apache/zeppelin/compare/master...martin-g:use-travis-ci-for-linux-arm64?expand=1)
 and the builds do **not** consume my credits!
   
   I face some problems with the Conda packages though:
   ```
   +conda config --add channels conda-forge
   +conda install -q numpy=1.21.2 pandas=1.3.3 matplotlib=3.4.3 pandasql=0.7.3 
ipython=7.28.0 jupyter_client=5.3.4 ipykernel=6.4.1 bokeh=2.4.0
   Collecting package metadata (current_repodata.json): ...working... done
   Solving environment: ...working... failed with initial frozen solve. 
Retrying with flexible solve.
   Solving environment: ...working... failed with repodata from 
current_repodata.json, will retry with next repodata source.
   Collecting package metadata (repodata.json): ...working... done
   Solving environment: ...working... failed with initial frozen solve. 
Retrying with flexible solve.
                                                                       
   Found conflicts! Looking for incompatible packages.
   This can take several minutes.  Press CTRL-C to abort.
   failed
   UnsatisfiableError: The following specifications were found
   to be incompatible with the existing python installation in your environment:
   Specifications:
     - jupyter_client=5.3.4 -> 
python[version='>=3.6,<3.7.0a0|>=3.8,<3.9.0a0|>=3.7,<3.8.0a0']
     - pandasql=0.7.3 -> python[version='>=2.7,<2.8.0a0|>=3.6,<3.7.0a0']
   Your python: python=3.9
   ```
   
   There is only Miniconda **3** for Linux Aarch64!
   And I tried to use the latest versions of the packages at 
https://conda.anaconda.org/conda-forge/linux-aarch64/.
   But some packages have no versions for Python 3.9!
   Is there a way to pin Python to 3.8 ?
   


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