hadoop在Master節點9000埠啟動失敗原因
阿新 • • 發佈：2019-01-26
由於公司測試需要，需搭建hbase叢集，在搭建的過程中，到hadoop安裝叢集的時候出現了9000埠一直未監聽，啟動時丟擲了以下告警資訊：
從告警資訊可以看出，在/root/.ssh/known_hosts 中IP：192.168.40.245的金鑰已經出現變更，這是由於之前這臺主機的IP地址有做改變，而之前有做過一次免金鑰認證了，所以現在金鑰就出現了錯亂。Starting namenodes on [Master] Master: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Master: @ WARNING: POSSIBLE DNS SPOOFING DETECTED! @ Master: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Master: The ECDSA host key for master has changed, Master: and the key for the corresponding IP address 192.168.40.245 Master: is unknown. This could either mean that Master: DNS SPOOFING is happening or the IP address for the host Master: and its host key have changed at the same time. Master: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Master: @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ Master: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Master: IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Master: Someone could be eavesdropping on you right now (man-in-the-middle attack)! Master: It is also possible that a host key has just been changed. Master: The fingerprint for the ECDSA key sent by the remote host is Master: cb:7f:7b:bb:12:69:08:92:77:f8:35:64:d5:df:c8:f5. Master: Please contact your system administrator. Master: Add correct host key in /root/.ssh/known_hosts to get rid of this message. Master: Offending ECDSA key in /root/.ssh/known_hosts:4 Master: ECDSA host key for master has changed and you have requested strict checking. Master: Host key verification failed.
解決辦法就是與IP：192.168.40.245這臺主機相關的key全部刪除，重新再做一次免金鑰認證就可以解決問題。