Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/1293
Thanks @khalidhuseynov for the fix. I tried this patch and it does not
print stacktrace on PING message anymore when user not logged in.
However, it still prints stacktrace when user browse zeppelin gui. And i
think it's also the case we don't need to print stacktrace.
Could you handle this case, too?
And IMO, i think it's okay to adjust log message level to DEBUG for both
case because user browse Zeppelin gui without valid ticket is fairly normal
behavior, when they're not logged in.
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