no, you must not use openjdk, you must install official java 8
Hey, It seems stable with these:
root@ubuntu-s-1vcpu-1gb-sgp1-01:~# java -version
java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)