Cách kết nối cơ sở dữ liệu postgres với Grails 2.3.4

Question

Tôi mới sử dụng Grails. Tôi đang cố gắng để kết nối máy chủ cơ sở dữ liệu postgresql 9,0 với grails 2.3.4. Tôi đã thêm tập tin postgresql-9.0-801.jdbc3.jar vào thư mục lib của ứng dụng grails. Khi tôi đang chạy ứng dụng trên trình soạn thảo Intellij, sau đó nhận được lỗi sau. Tôi đang làm sai ở đâu?

|Running Grails application Error | 2013-12-08 18:44:55,837 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool. Message: Driver:org.postgresql.Driver@7c3b99 returned null for URL:jdbc:postgres://localhost/clientpro Line | Method ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Error | 2013-12-08 18:44:55,877 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool. Message: Driver:org.postgresql.Driver@1ab5d6d returned null for URL:jdbc:postgres://localhost/clientpro Line | Method ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Error | 2013-12-08 18:44:56,160 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool. Message: Driver:org.postgresql.Driver@6bf551 returned null for URL:jdbc:postgres://localhost/clientpro Line | Method ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Error | 2013-12-08 18:44:56,174 [localhost-startStop-1] ERROR context.GrailsContextLoader - Error initializing the application: 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 'lobHandlerDetector' while setting bean property 'lobHandler'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'lobHandlerDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Driver:org.postgresql.Driver@6bf551 returned null for URL:jdbc:postgres://localhost/clientpro Message: 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 'lobHandlerDetector' while setting bean property 'lobHandler'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'lobHandlerDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Driver:org.postgresql.Driver@6bf551 returned null for URL:jdbc:postgres://localhost/clientpro Line | Method ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Caused by 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 'lobHandlerDetector' while setting bean property 'lobHandler'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'lobHandlerDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Driver:org.postgresql.Driver@6bf551 returned null for URL:jdbc:postgres://localhost/clientpro ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Caused by BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'lobHandlerDetector' while setting bean property 'lobHandler'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'lobHandlerDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Driver:org.postgresql.Driver@6bf551 returned null for URL:jdbc:postgres://localhost/clientpro ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Caused by BeanCreationException: Error creating bean with name 'lobHandlerDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Driver:org.postgresql.Driver@6bf551 returned null for URL:jdbc:postgres://localhost/clientpro ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Caused by MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Driver:org.postgresql.Driver@6bf551 returned null for URL:jdbc:postgres://localhost/clientpro ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Caused by SQLException: Driver:org.postgresql.Driver@6bf551 returned null for URL:jdbc:postgres://localhost/clientpro ->> 303 | innerRun in java.util.concurrent.FutureTask$Sync 
| 138 | run in java.util.concurrent.FutureTask | 895 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker | 918 | run in ''^662 | run . . in java.lang.Thread Error | Forked Grails VM exited with error Process finished with exit code 1 

DataSource file: -

dataSource { 
    pooled = true 
    driverClassName = "org.postgresql.Driver" 
    dialect = org.hibernate.dialect.PostgreSQLDialect 
    username = "postgres" 
    password = "password" 
} 
hibernate { 
    cache.use_second_level_cache = true 
    cache.use_query_cache = true 
    cache.provider_class='org.hibernate.cache.EhCacheProvider' 
} 
// environment specific settings 
environments { 
    development { 
     dataSource { 
     dbCreate = "update" 
     url = "jdbc:postgres://localhost/clientpro" 
     username = "postgres" 
     password = "password" 
     } 
    } 
    test { 
     dataSource { 
     dbCreate = "update" 
     url = "jdbc:postgres://localhost/clientpro" 
     username = "postgres" 
     password = "password" 
     } 
    } 
    production { 
     dataSource { 
     dbCreate = "update" 
     url = "jdbc:postgres://localhost/clientpro" 
     username = "postgres" 
     password = "password" 
     } 
    } 
} 

Answer 1

Hãy thử với một tiền tố khác nhau:

url = "jdbc:postgresql://localhost/clientpro"