无法在t2.micro（免费层）实例上启动Cassandra？

是不是可以在t2.micro（免费套餐）上推出Cassandra？我收到一个错误：

nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused (Connection refused)'. 我尝试过SO的几个解决方案

JVM_OPTS="$JVM_OPTS - Djava.rmi.server.hostname=127.0.0.1"

Restarting the service: sudo service cassandra restart

If you have a cluster, make sure that ports 7000 and 9042 are open within your security group. 这不是t2.medium实例上的问题。