Question

我根本不知道这个错误代码是什么，有没有人对此有所了解？我对grails很新，因此下面的错误代码对我来说是未知的。无法弄清楚它的正面或反面。 - Grails初学者运行Grails 3.1.2 MySQL Workbench 6

grails> run-app
| Running application...
Exception in thread "main" while parsing MappingNode
 in 'reader', line 31, column 13:
                dbCreate: update
                ^
Duplicate key: properties
 in 'reader', line 47, column 1:
    ---
    ^

        at org.springframework.beans.factory.config.YamlProcessor$StrictMapAppenderConstructor.constructMapping(YamlProcessor.java:407)
        at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:489)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:373)
        at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:147)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:354)
        at org.springframework.beans.factory.config.YamlProcessor$StrictMapAppenderConstructor.constructMapping(YamlProcessor.java:403)
        at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:489)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:373)
        at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:147)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:354)
        at org.springframework.beans.factory.config.YamlProcessor$StrictMapAppenderConstructor.constructMapping(YamlProcessor.java:403)
        at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:489)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:373)
        at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:147)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:354)
        at org.springframework.beans.factory.config.YamlProcessor$StrictMapAppenderConstructor.constructMapping(YamlProcessor.java:403)
        at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:489)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:141)
        at org.yaml.snakeyaml.constructor.BaseConstructor.getData(BaseConstructor.java:108)
        at org.yaml.snakeyaml.Yaml$1.next(Yaml.java:471)
        at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:158)
        at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:136)
        at org.grails.config.yaml.YamlPropertySourceLoader.load(YamlPropertySourceLoader.groovy:84)
        at org.grails.config.yaml.YamlPropertySourceLoader.load(YamlPropertySourceLoader.groovy:47)
        at org.springframework.boot.env.PropertySourcesLoader.load(PropertySourcesLoader.java:127)
        at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadIntoGroup(ConfigFileApplicationListener.java:462)
        at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:449)
        at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:374)
        at org.springframework.boot.context.config.ConfigFileApplicationListener.addPropertySources(ConfigFileApplicationListener.java:210)
        at org.springframework.boot.context.config.ConfigFileApplicationListener.postProcessEnvironment(ConfigFileApplicationListener.java:179)
        at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEnvironmentPreparedEvent(ConfigFileApplicationListener.java:166)
        at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEvent(ConfigFileApplicationListener.java:152)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:163)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:136)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:119)
        at org.springframework.boot.context.event.EventPublishingRunListener.publishEvent(EventPublishingRunListener.java:111)
        at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:65)
        at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)
        at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:330)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
        at grails.boot.GrailsApp.run(GrailsApp.groovy:55)
        at grails.boot.GrailsApp.run(GrailsApp.groovy:365)
        at grails.boot.GrailsApp.run(GrailsApp.groovy:354)
        at grails.boot.GrailsApp$run.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
        at grailsapp.Application.main(Application.groovy:8)

Answer 1

YML文件现在看起来像这样。它的工作原理

(StudentsGroup)o).getTotalPoints(studentsList)

解析MappingNode时线程main中的异常

1 个答案: