我正在尝试将MongoDB Atlas M0(免费套餐)用于我的JAVA EE应用程序,现在我正在使用:
使用本地数据库,一对MongoDB和Hibernate OGM就像魅力一样,但当我尝试将Hibernate与Mongo Atlas连接到免费层以测试云数据库时,我无法建立有效的连接,因为mongodb驱动程序会抛出异常com.mongodb.MongoSocketReadException:过早地到达流的末尾
我将提供两个版本的persistence.xml,第一个是使用localhost工作正常,第二个是我用来连接到云的版本。
工作localhost版本:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd"
version="2.2">
<!-- @@@ MongoDB HIBERNATE OGM PERSISTENCE UNIT @@@ -->
<persistence-unit name="PersistenceUnitNoSQL" transaction-type="JTA">
<provider>org.hibernate.ogm.jpa.HibernateOgmPersistence</provider>
<class>org.companyname.model.UserEntity</class>
<class>org.companyname.model.ItemEntity</class>
<properties>
<property name="hibernate.ogm.datastore.provider" value="mongodb"/>
<property name="hibernate.ogm.datastore.host" value="localhost:27017"/>
<property name="hibernate.ogm.datastore.database" value="databasename"/>
<property name="hibernate.ogm.datastore.create_database" value="true"/>
</properties>
</persistence-unit>
</persistence>
不工作的地图集云版:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd"
version="2.2">
<!-- @@@ MongoDB HIBERNATE OGM PERSISTENCE UNIT @@@ -->
<persistence-unit name="PersistenceUnitNoSQL" transaction-type="JTA">
<provider>org.hibernate.ogm.jpa.HibernateOgmPersistence</provider>
<class>org.companyname.model.UserEntity</class>
<class>org.companyname.model.ItemEntity</class>
<properties>
<property name="hibernate.ogm.datastore.provider" value="mongodb"/>
<property name="hibernate.ogm.datastore.host" value="cluster0-clustername-shard-00-00-raa4n.mongodb.net:27017,cluster0-clustername-shard-00-01-raa4n.mongodb.net:27017,cluster0-clustername-shard-00-02-raa4n.mongodb.net:27017"/>
<property name="hibernate.ogm.datastore.database" value="databasename"/>
<property name="hibernate.ogm.datastore.create_database" value="true"/>
<property name="hibernate.ogm.datastore.username" value="atlas-user-name"/>
<property name="hibernate.ogm.datastore.password" value="atlas-user-password"/>
<property name="hibernate.ogm.mongodb.authentication_mechanism" value="SCRAM_SHA_1"/>
</properties>
</persistence-unit>
</persistence>
像主机一样,我使用来自Atlas帐户帮助窗口的“标准连接字符串”的副本集URI,因为“短SRV连接字符串”Hibernate抛出org.hibernate.service.spi.ServiceException:OGM000072:无法配置数据存储提供程序,所以我认为还没有这种连接的支持。
因此,使用此最后一个persistence.xml配置,我遇到以下错误:
20:02:01,094 INFO [org.mongodb.driver.cluster] (ServerService Thread Pool -- 78) Cluster description not yet available. Waiting for 30000 ms before timing out
20:02:01,175 INFO [org.mongodb.driver.cluster] (cluster-ClusterId{value='5c5497a97aea6111622c7540', description='null'}-cluster0-clustername-shard-00-02-raa4n.mongodb.net:27017)
Exception in monitor thread while connecting to server cluster0-clustername-shard-00-02-raa4n.mongodb.net:27017: com.mongodb.MongoSocketReadException: Prematurely reached end of stream
at com.mongodb.internal.connection.SocketStream.read(SocketStream.java:112)
at com.mongodb.internal.connection.InternalStreamConnection.receiveResponseBuffers(InternalStreamConnection.java:570)
at com.mongodb.internal.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:441)
at com.mongodb.internal.connection.InternalStreamConnection.receiveCommandMessageResponse(InternalStreamConnection.java:295)
at com.mongodb.internal.connection.InternalStreamConnection.sendAndReceive(InternalStreamConnection.java:255)
at com.mongodb.internal.connection.CommandHelper.sendAndReceive(CommandHelper.java:83)
at com.mongodb.internal.connection.CommandHelper.executeCommand(CommandHelper.java:33)
at com.mongodb.internal.connection.InternalStreamConnectionInitializer.initializeConnectionDescription(InternalStreamConnectionInitializer.java:106)
at com.mongodb.internal.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:63)
at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:127)
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:117)
at java.lang.Thread.run(Thread.java:748)
Hibernate尝试连接到每个分片(00-00,00-01,00-02),但是所有抛出此异常。
我试图解决这个问题:
同
MongoClient mongoClient = MongoClients.create("mongodb+srv://atlas-user-name:[email protected]/test?retryWrites=true");
要么
MongoClient mongoClient = MongoClients.create("mongodb://atlas-user-name:atlas-user-password@cluster0-clustername-shard-00-00-raa4n.mongodb.net:27017,cluster0-clustername-shard-00-01-raa4n.mongodb.net:27017,cluster0-clustername-shard-00-02-raa4n.mongodb.net:27017/test?ssl=true&replicaSet=Cluster0-clustername-shard-0&authSource=admin&retryWrites=true");
两个案例都运行良好,我能够建立连接并使用数据库没有问题。
所以我的问题是为什么Hibernate抛出这种异常?
Hibernate OGM创建客户端的方式可能不正确。
我认为现在更容易检查这个问题的方法是覆盖MongoDBDatastoreProvider
并提供一个初始化的MongoClient。
您可以通过扩展MongoDBDatastoreProvider并覆盖createMongoClient方法来完成此操作。就像是:
package org.myprojects;
import org.hibernate.ogm.datastore.mongodb.impl.MongoDBDatastoreProvider;
public class MYCustomMongoDBDatastoreProvider extends MongoDBDatastoreProvider {
@Override
protected MongoClient createMongoClient(MongoDBConfiguration config) {
return MongoClients.create(...);
}
}
然后使用属性OgmProperties.DATASTORE_PROVIDER
来使用您的数据存储提供程序:
hibernate.ogm.datastore.provider = org.myprojects.MYCustomMongoDBDatastoreProvider
在这个例子中,我在hibernate.properties文件中设置它,但你可以将它设置在对你的项目更有意义的地方。
编辑:有关错误的其他说明。
I think the problems is that we are not using the factory to create the mongo client。
编辑2:问题可能是由于缺乏对SSL的支持。 An issue has been created并包含更多信息