Due to a known issue do not use JDK1.8.0_151 with WSO2 products. Use JDK 1.8.0_144 until JDK 1.8.0_162-ea is released.
Space Details - API Manager 2.1.0 - WSO2 Documentation

Space Tools

API Manager 2.1.0
AM210
Home page: WSO2 API Manager Documentation
Tania Mahanama
(Nov 18, 2016)
(None)
API Manager Documentation