Error on adding multiple entitymanager

Question

I've created two datasources one for the local database and another for reading some data from different database. However on starting the server up the I get the following exception :

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory2' defined in file [/home/pallav/91mobiles/community-api/dist/WEB-INF/classes/spring-config/spring-context.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Missing table: Answer
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1568) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:540) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956) ~[spring-context-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:747) ~[spring-context-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) ~[spring-context-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) [spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) [spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) [spring-web-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4811) [catalina.jar:8.0.33]
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5251) [catalina.jar:8.0.33]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) [catalina.jar:8.0.33]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725) [catalina.jar:8.0.33]
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701) [catalina.jar:8.0.33]
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717) [catalina.jar:8.0.33]
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:587) [catalina.jar:8.0.33]
    at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1798) [catalina.jar:8.0.33]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_77]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_77]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_77]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_77]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_77]
Caused by: org.hibernate.HibernateException: Missing table: Answer
    at org.hibernate.cfg.Configuration.validateSchema(Configuration.java:1335) ~[hibernate-core-4.3.8.Final.jar:4.3.8.Final]
    at org.hibernate.tool.hbm2ddl.SchemaValidator.validate(SchemaValidator.java:175) ~[hibernate-core-4.3.8.Final.jar:4.3.8.Final]
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:525) ~[hibernate-core-4.3.8.Final.jar:4.3.8.Final]
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1859) ~[hibernate-core-4.3.8.Final.jar:4.3.8.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850) ~[hibernate-entitymanager-4.3.3.Final.jar:4.3.3.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843) ~[hibernate-entitymanager-4.3.3.Final.jar:4.3.3.Final]
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398) ~[hibernate-core-4.3.8.Final.jar:4.3.8.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842) ~[hibernate-entitymanager-4.3.3.Final.jar:4.3.3.Final]
    at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:150) ~[hibernate-entitymanager-4.3.3.Final.jar:4.3.3.Final]
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318) ~[spring-orm-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1627) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1564) ~[spring-beans-4.1.1.RELEASE.jar:4.1.1.RELEASE]
    ... 25 common frames omitted

Below is my spring xml :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">

<context:annotation-config />
<context:component-scan base-package="com.nm" />

<mvc:annotation-driven />

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    <property name="messageConverters">
        <list>
            <ref bean="jsonMessageConverter"/>
        </list>
    </property>
</bean>

<bean id="jsonMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">

</bean>


<bean class="org.apache.commons.dbcp.BasicDataSource" id="dataSource">
    <property name="driverClassName" value="${dbdriverClassName}" />
    <property name="url" value="${db-url}" />
    <property name="username" value="${db-username}" />
    <property name="password" value="${db-password}" />
    <!-- <property name="initialPoolSize" value="1" /> <property name="minPoolSize" 
        value="1" /> <property name="maxPoolSize" value="10" /> -->
</bean>


<bean class="org.apache.commons.dbcp.BasicDataSource" id="dataSource2">
    <property name="driverClassName" value="${dbdriverClassName2}" />
    <property name="url" value="${db-url2}" />
    <property name="username" value="${db-username2}" />
    <property name="password" value="${db-password2}" />
    <!-- <property name="initialPoolSize" value="1" /> <property name="minPoolSize"
        value="1" /> <property name="maxPoolSize" value="10" /> -->
</bean>

<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
    <property name="persistenceUnitName" value="persistenceUnit" />
    <property name="dataSource" ref="dataSource" />
</bean>

<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory2">
    <property name="persistenceUnitName" value="persistenceUnit2" />
    <property name="dataSource" ref="dataSource2" />
</bean>


<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager2">
    <property name="entityManagerFactory" ref="entityManagerFactory2" />
</bean>

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations" value="classpath:property-files/config-info.properties" />
</bean>

<tx:annotation-driven transaction-manager="transactionManager"/>
<tx:annotation-driven transaction-manager="transactionManager2"/>
</beans>

persistence.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="persistenceUnit"
    transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
        <property name="hibernate.hbm2ddl.auto" value="update" />
        <property name="hibernate.connection.charSet" value="UTF-8" />
        <property name="hibernate.search.default.directory_provider" value="filesystem" />
        <property name="hibernate.search.default.indexBase" value="/home/pallav/community-api/indexes" />
        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.format_sql" value="true"/>
        <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.EJB3NamingStrategy" />
    </properties>
</persistence-unit>
<persistence-unit name="persistenceUnit2"
                  transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
        <property name="hibernate.hbm2ddl.auto" value="validate" />
        <property name="hibernate.connection.charSet" value="UTF-8" />
        <property name="hibernate.search.default.directory_provider" value="filesystem" />
        <property name="hibernate.search.default.indexBase" value="/home/pallav/community-api/indexes" />
        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.format_sql" value="true"/>
        <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.EJB3NamingStrategy" />
    </properties>
</persistence-unit>

and below is the entity

@PersistenceUnit(unitName="persistenceUnit")
@Entity
public class Answer implements BaseEntity{

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;

@ManyToOne
private Question question;

private String description;

private int likes;

private int spam;

private int comments;

private short status;
- - - 

I don't want the Answer table to be there in the second database. Kindly help me out. Thanks in advance.

Answer 1

Following is what I did in order to segregate the Entities based on the persistence units.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="persistenceUnit"
    transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <class>com.nm.community.entities.Question</class>
    <class>com.nm.community.entities.Answer</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
        <property name="hibernate.hbm2ddl.auto" value="update" />
        <property name="hibernate.connection.charSet" value="UTF-8" />
        <property name="hibernate.search.default.directory_provider" value="filesystem" />
        <property name="hibernate.search.default.indexBase" value="/home/pallav/community-api/indexes" />
        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.format_sql" value="true"/>
        <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.EJB3NamingStrategy" />
        <!-- <property name="hibernate.search.default.indexBase" value="../community-api/indexes" /> -->
    </properties>
</persistence-unit>
<persistence-unit name="persistenceUnit2"
                  transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <class>com.nm.community.entities.MasterProductEntity</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
        <property name="hibernate.hbm2ddl.auto" value="validate" />
        <property name="hibernate.connection.charSet" value="UTF-8" />
        <property name="hibernate.search.default.directory_provider" value="filesystem" />
        <property name="hibernate.search.default.indexBase" value="/home/pallav/community-api/indexes" />
        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.format_sql" value="true"/>
        <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.EJB3NamingStrategy" />
        <!-- <property name="hibernate.search.default.indexBase" value="../community-api/indexes" /> -->
    </properties>
</persistence-unit>

Each persistence unit is provided with the names of the classes on which the datasource would look for while server is getting up. Also, <exclude-unlisted-classes> should be true .