Spring: TransactionRequiredException: No transaction is in progress at entitymanager.flush() - spring

Question

I know there are a lot of posts about this error. But nothing seems working for me. I am getting TransactionRequiredException at entitymanager.flush()
I have config class `
#Configuration
#EnableTransactionManagement
#EnableJpaRepositories(
entityManagerFactoryRef = “msEntityManagerFactory",
transactionManagerRef = “msTransactionManager",
basePackages = {
x, y, z
})
public class msConfig {
#Bean(name = “msDataSource")
#ConfigurationProperties(prefix = "postgres.datasource.hikari")
public DataSource msDataSource() {
return DataSourceBuilder.create().build();
}
#Bean(name = “msEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean entityManagerFactory(
EntityManagerFactoryBuilder entityManagerFactoryBuilder,
#Qualifier(“msDataSource") DataSource dataSource) {
Properties properties = new Properties();
properties.setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
LocalContainerEntityManagerFactoryBean entityManager = entityManagerFactoryBuilder
.dataSource(dataSource)
.packages(“x”,”y”, “z”)
.persistenceUnit("postgres")
.build();
entityManager.setJpaProperties(properties);
return entityManager;
}
#Bean(name = “msTransactionManager")
public PlatformTransactionManager transactionManager(#Qualifier(“msEntityManagerFactory") EntityManagerFactory entityManagerFactory) {
return new JpaTransactionManager(entityManagerFactory);
}
}
`
And In my service class, I am injecting EntityManager from above class like
public Dummy(#Qualifier(“msEntityManagerFactory") EntityManager entityManager) {
this.entityManager = entityManager;
}
In same class, I have another method that is marked as #Transactional and has entityManager.flush()
What is missing?
Edit:
javax.persistence.TransactionRequiredException: no transaction is in progress
at org.hibernate.internal.AbstractSharedSessionContract.checkTransactionNeededForUpdateOperation(AbstractSharedSessionContract.java:413)
at org.hibernate.internal.SessionImpl.checkTransactionNeededForUpdateOperation(SessionImpl.java:3398)
at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1355)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1350)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:366)
at com.sun.proxy.$Proxy220.flush(Unknown Source)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:314)
at com.sun.proxy.$Proxy220.flush(Unknown Source)