[jira] [Created] (KUDU-3533) gssapi related unit test fails on MacOS

["halim kim (Jira)" <ji...@apache.org>]

halim kim created KUDU-3533:
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             Summary: gssapi related unit test fails on MacOS
                 Key: KUDU-3533
                 URL: https://issues.apache.org/jira/browse/KUDU-3533
             Project: Kudu
          Issue Type: Bug
            Reporter: halim kim


In Kudu, There are some unit test cases for gssapi verification. these test cases are passed without any problem on centos(and other OSs except MacOS).

The thing is on MacOS. MacOS uses heimdal kerberos implementaion instead of MITs.
Consequently, results of some unit tests are different from what we expected.

What I've experienced is SpnegoWebserverTest(in webserver-test.cc) failure.
I was trying to add more SpnegoWebserverTest cases, but only the first SpnegoWebserverTest test case succeed and others does not. To figure out the cause, I checked the test logs setting 'KRB5_TRACE' env variable as '/dev/stderr'.

I finally found that all the test cases use kdc port number same as first test case kdc port. Therefore only the first case passes the test and others can't do that. I think heimdal kerberos caches kdc information somewhere. I tried to find purge cache data completely but I couldn't find how to do that. 

My suggestion is to skip a test like above on MacOS until get to know how to manipulate heimdal kerberos cache. Using '#ifndef __APPLE__' can help it. Kudu already do so on negotiation-test(https://github.com/apache/kudu/blob/ae7b08c006167da1ebb0c4302e5d6d7aa739a862/src/kudu/rpc/negotiation-test.cc#L1399-L1402)




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