mysql - linux env 上的 grails 部署中的 BeanCreationException

Question

我正在尝试在 tomcat6 上部署使用 grails 创建的 war 文件。相同的 war 文件在我的 Windows 机器上工作正常它确实给了我以下 prod linux 环境的异常

SEVERE: Exception sending context initialized event to listener instance of class org.codehaus.groovy.grails.web.context.GrailsContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'com.mysql.jdbc.Driver'

和

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class 'com.mysql.jdbc.Driver'
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:329)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:107)

我已经过了 How do I fix the org.springframework.beans.factory.BeanCreationException error in my Grails application?

和

Grails transactionManager exception on Run

但它死了也无济于事

Answer 1

滚动到显示 Cannot load JDBC driver class 'com.mysql.jdbc.Driver' 的末尾。 Grails 异常的通常情况是顶层文本是通用的且无用的，真正的原因在更靠近底部的地方。

我猜您将 MySQL 驱动程序 jar 放在了 lib 目录中，但 Grails 没有在那里找到它。你不应该使用 jars，除非它们在在线 repo 中不可用，而 MySQL 驱动程序肯定是。事实上，它是 dependencies block 中 BuildConfig.groovy 中的示例条目。取消注释，可选择更新到最新版本 (5.1.28)，然后重新部署您的 war 文件。确保它在文件中，在 WEB-INF/lib