java - Cassandra——nodetool 不能在另一台机器上工作？

Question

我在 4 个节点上有一个 cassandra 集群(每个节点都运行 ubuntu 10.04 和 cassandra 0.7.4)。所有节点都使用 SWITCH 连接，每个节点都分配有一个静态 IP 地址(不涉及 DNS)。

节点似乎运行正常(状态为“正常”，所有节点都已启动等)。

问题是这样的:nodetool有效，但它仅在 nodetool 时有效命令在同一节点上运行。当我尝试运行 nodetool从 STATIC_IP = 192.168.0.253 到 STATIC_IP = 192.168.0.4 我收到以下错误:

(注意:机器's3789'的静态IP为192.168.0.253)

user@s3789:/opt/cassandra/apache-cassandra-0.7.4$ bin/nodetool -host 192.168.0.4 ring

Error connection to remote JMX agent!
java.rmi.ConnectException: Connection refused to host: 127.0.1.1; nested exception is:
java.net.ConnectException: Connection refused
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:128)
at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source)
at javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2343)
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:296)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:267)
at org.apache.cassandra.tools.NodeProbe.connect(NodeProbe.java:137)
at org.apache.cassandra.tools.NodeProbe.<init>(NodeProbe.java:107)
at org.apache.cassandra.tools.NodeCmd.main(NodeCmd.java:511)
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
at java.net.Socket.connect(Socket.java:546)
at java.net.Socket.connect(Socket.java:495)
at java.net.Socket.<init>(Socket.java:392)
at java.net.Socket.<init>(Socket.java:206)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)

有什么解决办法吗？

Answer 1

来自 conf/cassandra-env.sh:

# add this if you're having trouble connecting:
# JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=<public name>"
# 
# see 
# https://blogs.oracle.com/jmxetc/entry/troubleshooting_connection_problems_in_jconsole
# for more on configuring JMX through firewalls, etc. (Short version:
# get it working with no firewall first.)