部署EM 12c的Agent时报错：Agent port passed by user is busy

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部署EM 12c的Agent时报错：Agent port passed by user is busy



最近在部署EM 12c的Agent是报了一个莫名其妙的错误：
ERROR: Agent Configuration Failed SEVERE: Agent port passed by user is busy and cannot proceed with the configuration. Pass a free port and retry the configuration. (由用户传递的代理端口正忙, 无法继续配置)
使用命令“netstat -na|grep 3872”检查没问题，3872端口确实是空闲的。最后在Metalink上找到了原因。原来真正的原因是/etc/hosts配置有问题，和端口无关。Oracle已经把它列为Bug 13652664。推荐阅读相关文章Doc ID 1489279.1