Github user zohar-mizrahi commented on the issue:
https://github.com/apache/flink/pull/3838
One of the critical attributes is
```PythonEnvironmentConfig::pythonTmpCachePath```, which is used in the
following places:
- ```PythonStreamExecutionEnvironment::execute:362```
- ```PythonStreamExecutionEnvironment::execute:400```
- ```PythonStreamBinder::prepareFiles:117```
On the client side, the temporary files are prepared for distribution by
the ```PythonStreamBinder``` and then processed by the
``````PythonStreamExecutionEnvironment::execute``` function, which is called
from the Python script. When the python script is executed on the TaskManager,
this attribute remains ```null``` and thus, the ```execute``` returns
immediately.
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