You don't have different versions of psycopg2 in the ourusr vs system 
drivers do you?  Looks like newer versions of psycopg2 no longer support 
python 3.6

https://www.psycopg.org/psycopg3/docs/basic/install.html



On Thursday, March 31, 2022 at 9:01:24 AM UTC-5 urban....@gmail.com wrote:

> Thank you for the reply!
>
> I believe we've already tried sudo pip install psycopg2. 
> Psycopg2 seems to be located at */usr/local/lib64/python3.6/site-packages*
> Other packages that don't exhibit the same problem are also there. 
> There's another installation of psycopg2 in
> */home/ouruser/.local/lib/python3.6/site-packages/psycopg2*
>
> I'm not sure about the user running the process, but I think it isn't 
> root. I'll have to check that with the colleague chiefly wrestling with 
> this migration.  
>
> Yes, we're going to move to a newer version. In fact we started on a newer 
> version but ran into this problem. We're now on 3.6 because we were 
> checking if the problem would persist since 3.6 was the default python3 on 
> the machine. 
>
> It's interesting that this is an issue in particular with psycopg2.
>
> On Thursday, March 31, 2022 at 2:21:42 PM UTC+2 Jim S wrote:
>
>> When I've run into similar situations on Ubuntu the resolution was to 
>> install the package using sudo.  If you just pip installed the package 
>> under your user then I believe it is stored in 
>> .local/lib/python3.x/site-packages in the user home directory.
>>
>> This would explain why it works when you run it interactively.  What user 
>> is running your uwsgi process?  
>>
>> Also, if possible I'd move to a newer version of python3.  Python 3.6 is 
>> end-of-life as of 12/23/2021
>>
>> -Jim
>>
>>
>> On Thursday, March 31, 2022 at 6:24:32 AM UTC-5 urban....@gmail.com 
>> wrote:
>>
>>> Hi,
>>>
>>> Trying to setup web2py, python3 centos 7, nginx, uwsgi.
>>>
>>> The application is already running on centos 7 with python 2.7.
>>>
>>> With python 3.6 I get the following error:
>>>
>>> class 'RuntimeError'> Failure to connect, tried 5 times:
>>> Traceback (most recent call last):
>>>   File "/opt/web2py/gluon/packages/dal/pydal/base.py", line 514, in 
>>> __init__
>>>     self._adapter = adapter(**kwargs)
>>>   File "/opt/web2py/gluon/packages/dal/pydal/adapters/postgres.py", line 
>>> 28, in __call__
>>>     return AdapterMeta.__call__(cls, *args, **kwargs)
>>>   File "/opt/web2py/gluon/packages/dal/pydal/adapters/__init__.py", line 
>>> 41, in __call__
>>>     obj = super(AdapterMeta, cls).__call__(*args, **kwargs)
>>>   File "/opt/web2py/gluon/packages/dal/pydal/adapters/postgres.py", line 
>>> 67, in __init__
>>>     after_connection,
>>>   File "/opt/web2py/gluon/packages/dal/pydal/adapters/base.py", line 
>>> 424, in __init__
>>>     super(SQLAdapter, self).__init__(*args, **kwargs)
>>>   File "/opt/web2py/gluon/packages/dal/pydal/adapters/base.py", line 85, 
>>> in __init__
>>>     self.find_driver()
>>>   File "/opt/web2py/gluon/packages/dal/pydal/adapters/base.py", line 
>>> 134, in find_driver
>>>     "No driver of supported ones %s is available" % str(self.drivers)
>>> RuntimeError: No driver of supported ones ('psycopg2',) is available
>>>
>>> This only occurs when running the application through uwsgi, but not 
>>> when I run the web2py application directly through:
>>> *> python3 web2py.py*
>>>
>>> I also tried importing psycopg2 in the welcome app and got the following 
>>> error:
>>>   File "/opt/web2py/gluon/custom_import.py", line 78, in custom_importer
>>>     result = sys.modules[modules_prefix]
>>> KeyError: 'applications.welcome.modules.psycopg2'
>>>
>>> *Any clue as to what might be the problem? Apparently python is unable 
>>> to locate the psycopg2 app when ran via uwsgi.*
>>>
>>> *I'm not sure if this is enough information or what other details I 
>>> should provide.*
>>>
>>

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