In Ambari the Hiveserver2 is shown as "green", but there is an alert indicating problem with the Hiverserver2 process.

This is due to a known bug in HDP2.2.3/2.2.4, that at Hive startup time no Kerberos ticket will be grabbed. To get rid of that alert, login to the Hiveserver node, become user hive and execute a "kinit -kt /etc/security/keytabs/hive.service.keytab hive/<hiveserver>@<REALM>" (if you keytab is in that default directory) to ensure the hive user got a valid Kerberos ticket.

Afterwards you can restart Hiveserver in Ambari and the alert will disappear (Thanks to @dprichici for highlighting this)

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