SWATError: Unknown session.: <session-reference>

[githje]

Hi,

we're trying to connect to a 2022.09 LTS cluster through the nginx ingress using the latest SWAT package. The constructor call fails with this message:

SWATError: Unknown session.: 3dfeb19a-09e2-674e-ad1e-ab78338ff9af

This is similar to an issue we've found here, but note that our error actually lists a CAS session reference which looks ok. The log output seems to indicate that the 1st REST call returns a valid session reference which is not recognized by the 2nd call?

There are no related error messages in the CAS log. How can we further debug this? (on the SAS/Kubernetes side maybe?). The Viya environment is hosted on AWS.

Thanks for looking into this!

Here's our test code:

os.environ['CAS_CLIENT_SSL_CA_LIST']='C:\\Users\\myuser\\Documents\\trustedcerts.pem'

swat.options.cas.debug.requests = True
swat.options.cas.debug.request_bodies = True
swat.options.cas.debug.responses = True
swat.options.cas.print_messages = True

conn = swat.CAS('https://sasviya-nlb.somemachine.com:443/cas-shared-default-http/', 
  username='myuser', password=getpass.getpass("Enter password"))

This is the log output (abbreviated):

PUT https://sasviya-nlb.somemachine.com:443/cas-shared-default-http/cas/sessions
User-Agent: python-requests/2.28.1
Accept-Encoding: gzip, deflate
Accept: application/json
Connection: keep-alive
Content-Type: application/json
Content-Length: 0
Authorization: b'Basic XYZ123=='

RESPONSE text: 
{ "session": "3dfeb19a-09e2-674e-ad1e-ab78338ff9af" }

POST https://sasviya-nlb.somemachine.com:443/cas-shared-default-http/cas/sessions/3dfeb19a-09e2-674e-ad1e-ab78338ff9af/actions/builtins.serverstatus
User-Agent: python-requests/2.28.1
Accept-Encoding: gzip, deflate
Accept: application/json
Connection: keep-alive
Content-Type: application/json
Content-Length: 43
Authorization: b'Basic XYZ123=='
tkhttp-id: L/o00jB/M60ST7zV...SG9nbMg

{"_apptag": "UI", "_messagelevel": "error"}

RESPONSE text: 
{
  "error": "Unknown session.",
  "code": "SessionUnknown",
  "details": "3dfeb19a-09e2-674e-ad1e-ab78338ff9af",
  "disposition": null
}

---------------------------------------------------------------------------
SWATError                                 Traceback (most recent call last)
Cell In[5], line 1
----> 1 conn = swat.CAS('https://sasviya-nlb.somemachine.com:443/cas-shared-default-http/', 
      2                 username='myuser', password=getpass.getpass("Enter password"))

File C:\devtools\Python3\lib\site-packages\swat\cas\connection.py:478, in CAS.__init__(self, hostname, port, username, password, session, locale, nworkers, name, authinfo, protocol, path, ssl_ca_list, authcode, **kwargs)
    473 self._results_hooks = {}
    475 # Get server attributes
    476 (self.server_type,
    477  self.server_version,
--> 478  self.server_features) = self._get_server_features()
    480 # Preload __dir__ information.  It will be extended later with action names
    481 self._dir = set([x for x in super_dir(CAS, self)])

File C:\devtools\Python3\lib\site-packages\swat\cas\connection.py:587, in CAS._get_server_features(self)
    577 '''
    578 Determine which features are available in the server
    579 
   (...)
    583 
    584 '''
    585 out = set()
--> 587 info = self._raw_retrieve('builtins.serverstatus', _messagelevel='error',
    588                           _apptag='UI')
    589 if info.severity > 1:
    590     raise SWATError(info.status)

File C:\devtools\Python3\lib\site-packages\swat\cas\connection.py:1815, in CAS._raw_retrieve(self, _name_, **kwargs)
   1812 ''' Call a CAS action without parameter checking and return results '''
   1813 try:
   1814     # Call the action and compile the results
-> 1815     self._invoke_without_signature(a2n(_name_), **kwargs)
   1816     return self._get_results(getnext(self))
   1817 except SWATCASActionRetry:

File C:\devtools\Python3\lib\site-packages\swat\cas\connection.py:1236, in CAS._invoke_without_signature(self, _name_, **kwargs)
   1219 '''
   1220 Call an action on the server
   1221 
   (...)
   1233 
   1234 '''
   1235 if isinstance(self._sw_connection, rest.REST_CASConnection):
-> 1236     errorcheck(self._sw_connection.invoke(a2n(_name_), kwargs),
   1237                self._sw_connection)
   1238 else:
   1239     errorcheck(self._sw_connection.invoke(a2n(_name_),
   1240                                           py2cas(self._soptions,
   1241                                                  self._sw_error, **kwargs)),
   1242                self._sw_connection)

File C:\devtools\Python3\lib\site-packages\swat\cas\rest\connection.py:725, in REST_CASConnection.invoke(self, action_name, kwargs)
    723     if self._results.get('details'):
    724         msg = '{}: {}'.format(msg, self._results['details'])
--> 725     raise SWATError(msg)
    726 else:
    727     raise SWATError('Unknown error')

SWATError: Unknown session.: 3dfeb19a-09e2-674e-ad1e-ab78338ff9af

[githje]

I'm closing this one - it turned out that the problem was caused by a case mismatch in the user ID - we had to make sure to enter the user ID "all uppercase" ("MYUSERID" vs. "myuserid"). I also just found this setting: env.CASUSERIGNORECASE='ON' which should make things even easier.