The release is only for linux_x86_64 platforms running Python 3.6.x, 3.7.x or 3.8.x.
Download and install the .whl file with pip as follows:
# Python 3.6
sudo pip3 install ./deephaven_jpy-1.20211129.153-cp36-cp36m-linux_x86_64.whl
# Python 3.7
sudo pip3 install ./deephaven_jpy-1.20211129.153-cp37-cp37m-linux_x86_64.whl
# Python 3.8
sudo pip3 install ./deephaven_jpy-1.20211129.153-cp38-cp38-linux_x86_64.whl