Java 6u101, 7u85 and 8u51 and Later Releases Break Enterprise Manager Ops Center Agent Controller to
Please check the Sun Alert from 21-Aug-2015 on the topic :
Java 6u101, 7u85 and 8u51 and Later Releases Break Enterprise Manager Ops Center Agent Controller to Proxy Communication (Doc ID 2046582.1)
We have an additional document that complements the Sun Alert
Upgrading Java on an Oracle Enterprise Manager Ops Center Agent Controller to versions Java 6u101, 7u85 and 8u51 breaks the communication between the Agent Controller and it's corresponding Proxy Controller. (Doc ID 2036973.1)