我使用的是Windows10，我已经安装了Cassandra3.9.0，我更新的jdk版本是java版本“1.8.0\u211”
当我运行命令时 cassandra -f 它不再给我这个错误：

Exception (java.lang.AbstractMethodError) encountered during startup: org.apache.cassandra.utils.JMXServerUtils$Exporter.exportObject(Ljava/rmi/Remote;ILjava/rmi/server/RMIClientSocketFactory;Ljava/rmi/server/RMIServerSocketFactory;Lsun/misc/ObjectInputFilter;)Ljava/rmi/Remote;
java.lang.AbstractMethodError: org.apache.cassandra.utils.JMXServerUtils$Exporter.exportObject(Ljava/rmi/Remote;ILjava/rmi/server/RMIClientSocketFactory;Ljava/rmi/server/RMIServerSocketFactory;Lsun/misc/ObjectInputFilter;)Ljava/rmi/Remote;
        at javax.management.remote.rmi.RMIJRMPServerImpl.export(RMIJRMPServerImpl.java:150)
        at javax.management.remote.rmi.RMIJRMPServerImpl.export(RMIJRMPServerImpl.java:135)
        at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:405)
        at org.apache.cassandra.utils.JMXServerUtils.createJMXServer(JMXServerUtils.java:106)
        at org.apache.cassandra.service.CassandraDaemon.maybeInitJmx(CassandraDaemon.java:145)
        at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:219)
        at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:601)
        at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:730)
ERROR 12:54:22 Exception encountered during startup
java.lang.AbstractMethodError: org.apache.cassandra.utils.JMXServerUtils$Exporter.exportObject(Ljava/rmi/Remote;ILjava/rmi/server/RMIClientSocketFactory;Ljava/rmi/server/RMIServerSocketFactory;Lsun/misc/ObjectInputFilter;)Ljava/rmi/Remote;
        at javax.management.remote.rmi.RMIJRMPServerImpl.export(RMIJRMPServerImpl.java:150) ~[na:1.8.0_161]
        at javax.management.remote.rmi.RMIJRMPServerImpl.export(RMIJRMPServerImpl.java:135) ~[na:1.8.0_161]
        at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:405) ~[na:1.8.0_161]
        at org.apache.cassandra.utils.JMXServerUtils.createJMXServer(JMXServerUtils.java:106) ~[apache-cassandra-3.9.0.jar:3.9.0]
        at org.apache.cassandra.service.CassandraDaemon.maybeInitJmx(CassandraDaemon.java:145) [apache-cassandra-3.9.0.jar:3.9.0]
        at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:219) [apache-cassandra-3.9.0.jar:3.9.0]
        at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:601) [apache-cassandra-3.9.0.jar:3.9.0]
        at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:730) [apache-cassandra-3.9.0.jar:3.9.0]

我读过很多帖子，但没有一个能解决我的问题。请建议。如果需要更多的信息请告诉我。