我想通过php启动hadoop集群。注意：hadoop服务器从终端via正常启动，没有任何错误 start-all.sh 还为机器添加了ssh密钥(tejas@192.168.1.104)还将tejas作为用户添加到apache中。我的php脚本是： shell_exec('/home/tejas/hadoop/bin/start-all.sh'); 脚本抛出错误 starting namenode, logging to /home/tejas/hadoop/libexec/../logs/hadoop--namenode-tejas.out 192.168.1.104: Host key verification failed. 192.168.1.104: Host key verification failed. jobtracker running as process 20020. Stop it first. 192.168.1.104: Host key verification failed. 失败，不启动任何服务。