今天有个应用一直起不来，感觉配置都对啊，奇了怪了。看日志发现如下：
STATUS | wrapper | 2017/01/04 08:09:31 | Launching a JVM...
INFO | jvm 7 | 2017/01/04 08:09:32 | Error: Exception thrown by the agent : java.rmi.server.ExportException: Port already in use: 40124; nested exception is:
INFO | jvm 7 | 2017/01/04 08:09:32 | java.net.BindException: Address already in use
ERROR | wrapper | 2017/01/04 08:09:32 | JVM exited while loading the application.
一直想不起来哪里配置了40124端口，似乎又有印象，瞬间想起来，配置文件里加了jmx的参数。删除后，问题解决。