如何在 grails 2.4.4 中使用 mongodb？

Question

我一直在尝试将 mongodb 与 grails 一起使用。为此，在 BuildConfig.groovy 的插件部分中添加以下代码

compile ":mongodb:3.0.3" 

然后我把 DataSource.groovy 改成了下面的：

          grails {
            mongo {
              host = "localhost"
              port = 27107
              username = "user"
              password="secretpassword"
              databaseName = "physicians"
            }
          }

但是会导致编译错误如下：

Error |
2015-07-14 14:29:53,412 [localhost-startStop-1] ERROR context.GrailsContextLoaderListener  - 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 'mongoTransactionManager' while setting constructor argument with key [1]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoTransactionManager': Cannot resolve reference to bean 'mongoDatastore' while setting bean property 'datastore'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoDatastore': Cannot resolve reference to bean 'mongoBean' while setting bean property 'mongo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongo': Invocation of init method failed; nested exception is com.mongodb.MongoTimeoutException: Timed out while waiting for a server that matches AnyServerSelector{} after 10000 ms
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 'mongoTransactionManager' while setting constructor argument with key [1]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoTransactionManager': Cannot resolve reference to bean 'mongoDatastore' while setting bean property 'datastore'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoDatastore': Cannot resolve reference to bean 'mongoBean' while setting bean property 'mongo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongo': Invocation of init method failed; nested exception is com.mongodb.MongoTimeoutException: Timed out while waiting for a server that matches AnyServerSelector{} after 10000 ms
    Line | Method
->>  334 | innerRun  in java.util.concurrent.FutureTask$Sync
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    166 | run       in java.util.concurrent.FutureTask
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run       in java.util.concurrent.ThreadPoolExecutor$Worker
^    724 | run . . . in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'mongoTransactionManager' while setting constructor argument with key [1]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoTransactionManager': Cannot resolve reference to bean 'mongoDatastore' while setting bean property 'datastore'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoDatastore': Cannot resolve reference to bean 'mongoBean' while setting bean property 'mongo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongo': Invocation of init method failed; nested exception is com.mongodb.MongoTimeoutException: Timed out while waiting for a server that matches AnyServerSelector{} after 10000 ms
->>  334 | innerRun  in java.util.concurrent.FutureTask$Sync
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    166 | run       in java.util.concurrent.FutureTask
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run       in java.util.concurrent.ThreadPoolExecutor$Worker
^    724 | run . . . in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'mongoTransactionManager': Cannot resolve reference to bean 'mongoDatastore' while setting bean property 'datastore'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoDatastore': Cannot resolve reference to bean 'mongoBean' while setting bean property 'mongo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongo': Invocation of init method failed; nested exception is com.mongodb.MongoTimeoutException: Timed out while waiting for a server that matches AnyServerSelector{} after 10000 ms
->>  334 | innerRun  in java.util.concurrent.FutureTask$Sync
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    166 | run       in java.util.concurrent.FutureTask
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run       in java.util.concurrent.ThreadPoolExecutor$Worker
^    724 | run . . . in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'mongoDatastore': Cannot resolve reference to bean 'mongoBean' while setting bean property 'mongo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongo': Invocation of init method failed; nested exception is com.mongodb.MongoTimeoutException: Timed out while waiting for a server that matches AnyServerSelector{} after 10000 ms
->>  334 | innerRun  in java.util.concurrent.FutureTask$Sync
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    166 | run       in java.util.concurrent.FutureTask
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run       in java.util.concurrent.ThreadPoolExecutor$Worker
^    724 | run . . . in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'mongo': Invocation of init method failed; nested exception is com.mongodb.MongoTimeoutException: Timed out while waiting for a server that matches AnyServerSelector{} after 10000 ms
->>  334 | innerRun  in java.util.concurrent.FutureTask$Sync
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    166 | run       in java.util.concurrent.FutureTask
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run       in java.util.concurrent.ThreadPoolExecutor$Worker
^    724 | run . . . in java.lang.Thread
Caused by MongoTimeoutException: Timed out while waiting for a server that matches AnyServerSelector{} after 10000 ms
->>   87 | getServer in com.mongodb.BaseCluster
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    654 | getServer in com.mongodb.DBTCPConnector
|     39 | access$300 in     ''
|    503 | getConnection in com.mongodb.DBTCPConnector$MyPort
|    451 | get . . . in     ''
|    624 | authenticate in com.mongodb.DBTCPConnector
|    195 | doAuthenticate in com.mongodb.DBApiLayer
|    765 | authenticateCommandHelper in com.mongodb.DB
|    721 | authenticate in     ''
|    149 | afterPropertiesSet in org.grails.datastore.gorm.mongo.bean.factory.GMongoFactoryBean
|    334 | innerRun  in java.util.concurrent.FutureTask$Sync
|    166 | run       in java.util.concurrent.FutureTask
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run       in java.util.concurrent.ThreadPoolExecutor$Worker
^    724 | run . . . in java.lang.Thread
Error |
Forked Grails VM exited with error

你能告诉我如何解决这个错误吗？顺便说一句，我一直在关注的教程可以在下面的链接中找到： http://blog.mongodb.org/post/18510469058/grails-in-the-land-of-mongodb

Answer 1

这就是正在发生的事情：

首先，您需要通过输入mongo 命令（并查看您是否登陆Mongo shell）或ps -A | grep mongod 来确认您的Mongo 服务是否正在运行。

无论如何，如果 MongoDB 服务正在运行，那么您首先需要启动您的服务。

sudo service mongod start # 适用于 Ubuntu 和 CentOS
# 或
mongod --config /etc/mognod.conf

（我已经为您提供了 Ubuntu 和 CentOS 的示例。如果您使用不同的操作系统，请阅读 this。）

现在，在您启动服务或确认 MongoDB 服务器已启动并运行后，您需要执行run-app。

我在您的问题中看到端口号有问题，即27107 而不是27017。我不确定这是否是问题中的错误，或者您已将其添加到您的 Grails DataSource.groovy 文件中。 默认情况下，MongoDB 在端口号27017 上运行（尽管您可以对其进行配置）。所以这可能是你的问题。

所以将该端口号更改为27017，然后执行grails run-app。这应该可以。

Answer 2

您的服务器无法访问，您可以在异常跟踪中清楚地看到：

由 MongoTimeoutException 引起：在 10000 毫秒后等待匹配 AnyServerSelector{} 的服务器时超时