.UnavailableSocketError: Inet 地址 127.0.0.1:7000 不可 用

我試圖在我的機器上創建一個包含三個 Cassandra 節點的集群。我解壓縮了 tar.gz 並更改了監聽和 rpc_addresses，還有 JMX_PORT。它沒有工作

~/apache-cassandra-3.11.1-1/bin$ nodetool -h 127.0.0.02 -p 8081 ring
nodetool: Failed to connect to '127.0.0.02:8081' - ConnectException: 'Connection refused (Connection refused)'.

然後我按照 ALex Ott 的建議，安裝了 ccm。然後我又遇到了問題

ccm start
Traceback (most recent call last):
 File "/home/jholmes/anaconda3/lib/python3.6/site-packages/ccm-3.1.3-py3.6.egg/ccmlib/common.py", line 513, in assert_socket_available
OSError: [Errno 98] Address already in use

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
 File "/home/jholmes/anaconda3/bin/ccm", line 4, in <module>
   __import__('pkg_resources').run_script('ccm==3.1.3', 'ccm')
 File "/home/jholmes/anaconda3/lib/python3.6/site-packages/pkg_resources/__init__.py", line 750, in run_script
   self.require(requires)[0].run_script(script_name, ns)
 File "/home/jholmes/anaconda3/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1534, in run_script
   exec(script_code, namespace, namespace)
 File "/home/jholmes/anaconda3/lib/python3.6/site-packages/ccm-3.1.3-py3.6.egg/EGG-INFO/scripts/ccm", line 105, in <module>
 File "/home/jholmes/anaconda3/lib/python3.6/site-packages/ccm-3.1.3-py3.6.egg/ccmlib/cmds/cluster_cmds.py", line 490, in run
 File "/home/jholmes/anaconda3/lib/python3.6/site-packages/ccm-3.1.3-py3.6.egg/ccmlib/cluster.py", line 389, in start
 File "/home/jholmes/anaconda3/lib/python3.6/site-packages/ccm-3.1.3-py3.6.egg/ccmlib/common.py", line 519, in assert_socket_available
ccmlib.common.UnavailableSocketError: Inet address 127.0.0.1:7000 is not available: [Errno 98] Address already in use; a cluster may already be running or you may need to add the loopback alias

如何檢查地址的可用性？

~/apache-cassandra-3.11.1-1/bin$ nodetool -h 127.0.0.02 -p 8081 ring
nodetool: Failed to connect to '127.0.0.02:8081' - ConnectException: 
'Connection refused (Connection refused)'.

127.0.0.02 看起來不像是一個有效的 IP

引用自：https://serverfault.com/questions/893065