If the Management Server runs on a Java 8 JVM, the SystemVM agent cannot connect to the mangement server. Symptoms:
- Agent State is not "up" but "disconnected" or "-"
- SystemVM agent log periodically logs "java.io.IOException: SSL: Fail to init SSL! java.io.IOException: Connection closed with -1 on reading size."
After switching to Java 7 (on EL6 with update-alternatives --config java ), the SystemVMs connect fine.