org.yaml.snakeyaml.scanner.ScannerException: while scanning a simple key

异常：

14:50:33.658 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
org.yaml.snakeyaml.scanner.ScannerException: while scanning a simple key
 in 'reader', line 36, column 9:
            length:10000
            ^
could not find expected ':'
 in 'reader', line 37, column 9:
            route-key: 
            ^

        at org.yaml.snakeyaml.scanner.ScannerImpl.stalePossibleSimpleKeys(ScannerImpl.java:505)
        at org.yaml.snakeyaml.scanner.ScannerImpl.needMoreTokens(ScannerImpl.java:320)
        at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:250)
        at 

异常原因：
举个栗子：host:8080
修改后：
YML文件 配置名+：+空格+属性

host: 8080