Failed to launch application server, server thread existing on windows

Question

I used the EnterpriseDB postgresql installer from their website, but when I finished and ran pgadmin (that came installed with postgresql) I get a configuration error that says:

An error occurred initializing the application server:

Failed to launch application server, server thread existing

It then asks me to input a python path and an application path. For the python path I assume it's C:\Users\xxx\AppData\Local\Programs\Python\Python35-32\Lib\site-packages\ which is where I have python installed. However i am not sure which application it's asking about.

9.6.3 version of postgresql. the pgadmin version is 4. windows 10 64bit

Answer 1

I encountered the same issue and found 'PYTHONPATH' system variable is causing the problem. So i deleted the environment variable and it worked fine. Fortunately i was not using these variables since my development environment is in remote.

So try removing 'PYTHONHOME' or 'PYTHONPATH' from the environment variable list and launch the application.

From the pgAdmin code,

# For unknown reason the Qt runtime does not pass the environment
# variables (i.e. PYTHONHOME, and PYTHONPATH), to the Python
# sub-processes, leading to failures executing background processes.
#
# This has been observed only on windows. On *nix systems, it is likely
# picking the system python environment, which is good enough to run
# the process-executor.**