If you run earlier versions of Oracle GoldenGate with MySQL 5.7, you could get the following error :
2016-03-02 07:07:19 ERROR OGG-00146 Call to VAMRead returned with error status 600: VAM Client Report < CAUSE OF FAILURE : Event Pointer is NULL WHEN FAILED : While processing the event in logProcessor WHERE FAILED : MySQLBinLog Reader Module CONTEXT OF FAILURE : No Information Available!>