ODI studio tried to connect to Hive (Kerberos enabled) using J2EE agent configured on WLS. The first connection was successful,
continuous connection were successful too if made within 2 minutes. Wait for about 2 minutes, the same connection failed with following exception:
GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt).
Restart the managed server, the above symptoms repeated.

The same connection was always successful when using no agent or standalone agent.