Did you ever fix this issue? We have a similar sitation where impala/jdbc connections work for odbc and some users with jdbc. We have a few users that have this same problem with jdbc only and not sure what the difference is on thier connections. We've verified kinit and java versions are the same as for working users. So far a mystery. "[Simba][ImpalaJDBCDriver](500168) Error creating login context using ticket cache: Unable to obtain Principal Name for authentication.". From my test account, it works just fine, from many users it works but one user's account they get this error message.
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