Delay in fetching kerberos tokens : python gssapi securitycontext

[unni10286]

0
down vote
favorite

Hi I'm using a python function as follows for fetching kerberos tokens

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

def get_token(server):       service = gssapi.Name("HTTP@%s" % server, gssapi.NameType.hostbased_service)       ctx = gssapi.SecurityContext(name=service, usage="initiate")     attempts = 0       while True:         try:             print("before")               token = ctx.step()               print("after")              break         except Exception as e:             attempts += 1             print(attempts)             if attempts < MAX_TOKEN_ATTEMPTS:                 logger.debug("exception while getting Kerberos token, trying again", exc_info=e)             else:                 raise OSError("too many failures while getting Kerberos token, discarding request") from e       b64token = base64.b64encode(token)     return b64token

The function is giving expected result. However the problem is, in one of my machine, the step "token = ctx.step()" is taking more than 5 sec to complete. In my other other machines it's taking less than 2 sec.

Any idea regrading the reason for delay?

-I have tried using IP address as well as the FQDN as the argument of the main funtion. all same.
-ping from all my machines to the server takes same time.

My environment:

Python 3.5.2
Ubuntu 16.04

[micseydel]

Cross-posted from https://stackoverflow.com/questions/5010...itycontext