Question

尝试使用命令行

使用数据库迁移插件1.3.6时，我遇到了一个奇怪的错误

grails --stacktrace dbm-generate-gorm-changelog changelog.groovy

错误是

Error Error executing script DbmGenerateGormChangelog: loader constraint violation: loader (instance of <bootloader>) previously initiated loading for a different type with name "javax/management/MBeanServer" (NOTE: Stack trace has been filtered. Use --verbose to see entire trace.)
java.lang.LinkageError: loader constraint violation: loader (instance of <bootloader>) previously initiated loading for a different type with name "javax/management/MBeanServer"

只有当我尝试在测试或生产（嵌入式tomcat）模式下执行此目标时才会发生这种情况。

我已尝试使用相同目的的其他版本的插件。

我真的发现这个错误太神秘了，不确定引擎盖下发生了什么，或者如何启动fixint，

Stacktrace如下：

Error executing script DbmGenerateGormChangelog: loader constraint violation: loader (instance of <bootloader>) previously initiated loading for a different type with name "javax/management/MBeanServer"
java.lang.LinkageError: loader constraint violation: loader (instance of <bootloader>) previously initiated loading for a different type with name "javax/management/MBeanServer"
        at org.springframework.jmx.support.JmxUtils.locateMBeanServer(JmxUtils.java:111)
        at org.springframework.jmx.support.JmxUtils.locateMBeanServer(JmxUtils.java:76)
        at org.springframework.jmx.support.JmxUtils$locateMBeanServer.call(Unknown Source)
        at grails.spring.BeanBuilder.invokeBeanDefiningClosure(BeanBuilder.java:754)
        at grails.spring.BeanBuilder.beans(BeanBuilder.java:584)
        at grails.spring.BeanBuilder.invokeMethod(BeanBuilder.java:527)
        at _GrailsBootstrap$_run_closure2.doCall(_GrailsBootstrap.groovy:40)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
        at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
        at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at _GrailsBootstrap$_run_closure6.doCall(_GrailsBootstrap.groovy:64)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
        at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
        at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
        at org.codehaus.gant.GantMetaClass.processClosure(GantMetaClass.java:81)
        at org.codehaus.gant.GantMetaClass.processArgument(GantMetaClass.java:95)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:128)
        at _DatabaseMigrationCommon_groovy$_run_closure1.doCall(_DatabaseMigrationCommon_groovy:25)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
        at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
        at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
        at org.codehaus.gant.GantMetaClass.processClosure(GantMetaClass.java:81)
        at org.codehaus.gant.GantMetaClass.processArgument(GantMetaClass.java:95)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:128)
        at DbmGenerateGormChangelog$_run_closure1.doCall(DbmGenerateGormChangelog:23)
        at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
        at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
        at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
        at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
        at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
        at gant.Gant.withBuildListeners(Gant.groovy:427)
        at gant.Gant.this$2$withBuildListeners(Gant.groovy)
        at gant.Gant.dispatch(Gant.groovy:415)
        at gant.Gant.this$2$dispatch(Gant.groovy)
        at gant.Gant.invokeMethod(Gant.groovy)
        at gant.Gant.executeTargets(Gant.groovy:591)
        at gant.Gant.executeTargets(Gant.groovy:590)

Answer 1

仅供记录：我的问题是mx4j是通过jets3t-plugin作为依赖项包含的。 mx4j似乎带来了自己的javax/management/MBeanServer接口，该接口与通过Java SDK / JRE提供的javax/management/MBeanServer冲突。排除mx4j为我解决了问题：

compile 'net.java.dev.jets3t:jets3t:0.9.3', { excludes 'mx4j' }

使用数据库迁移插件的LinkageError（先前为其他类型初始化的加载器）

1 个答案: