I was asked this question on [https://stackoverflow.com/questions/54487413/usage-of-hibernate-ogm-with-cloud-mongodb-atlas-m0-free-tier/54532599#54532599|http://example.com]
I am trying to use MongoDB Atlas M0 (Free Tier) for my JAVA EE application, now I am using:
* Local MongoDB database (v4.0.4)
* Hibernate Core "hibernate-core 5.3.6.Final"
* Hibernate OGM "hibernate-ogm-mongodb 5.3.1.Final"
* Java application server WildFly 15.0.0.Final
When I tried to connect Hibernate with Mongo Atlas to test cloud database, I am was not able to have a working connection, because mongodb driver throws an exception com.mongodb.MongoSocketReadException: Prematurely reached end of stream
{code:java}
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)
{code}
My persistence.xml that causes the error:
{code:java}
<?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>
{code}
As @Davide D'Alto suggested I create Factory to interact for the persistence unit
{code:java}
EntityManagerFactory emf = Persistence.createEntityManagerFactory("PersistenceUnitNoSQL");
{code}
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