Problem using Multitenancy Discriminator with Hibernate Search

Hibernate Search
1

My base Entity:

public abstract class MyBaseEntity {

  @Id
  @Column(name = "pkid", columnDefinition = "BINARY(16)")
  @GeneratedValue(generator = "uuid2")
  @GenericGenerator(name = "uuid2", strategy = "uuid2")
  @KeywordField(normalizer = "lowercase")
  private UUID pkid;

  @TenantId
  private String authority;
}

my persistence.xml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence"
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
  <persistence-unit name="my-persistence-unit">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="jakarta.persistence.schema-generation.database.action" value="none"/>
      <property name="jakarta.persistence.provider"
        value="org.hibernate.jpa.HibernatePersistenceProvider"/>
      <property name="jakarta.persistence.jdbc.driver" value="com.mysql.cj.jdbc.Driver"/>
      <property name="jakarta.persistence.jdbc.url"
        value="jdbc:mysql://myurl"/>
      <property name="jakarta.persistence.jdbc.user" value="root"/>
      <property name="jakarta.persistence.jdbc.password" value=""/>
      <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
      <property name="hibernate.connection.driver_class" value="com.mysql.cj.jdbc.Driver"/>
      <property name="hibernate.tenant_identifier_resolver"
        value="MyTenantIdentifierResolver"/>
      <property name="hibernate.search.backend.analysis.configurer"
        value="class:MyLuceneAnalysisConfigurer"/>
    </properties>
  </persistence-unit>
</persistence>

MyTenantIdentifierResolver :

public class MyTenantIdentifierResolver implements CurrentTenantIdentifierResolver {

  private String currentTenant = "unknown";

  public void setCurrentTenant(String tenant) {
    currentTenant = tenant;
  }

  @Override
  public String resolveCurrentTenantIdentifier() {
    return currentTenant;
  }

  @Override
  public boolean validateExistingCurrentSessions() {
    return !Objects.equals(currentTenant, "unknown");
  }

  @Override
  public boolean isRoot(String tenantId) {
    return Objects.equals(currentTenant, "rootTenant");
  }
}

This works fine for Hibernate but when using using a Hibernate SearchSession I get following error:
org.hibernate.search.util.common.SearchException: HSEARCH600031: Invalid tenant identifier: 'unknown'. The tenant identifier must be null, because multi-tenancy is disabled for this backend.

Then i tried to add so additional configurations to my persistence.xml:

      <property name="hibernate.multiTenancy" value="DISCRIMINATOR"/>
      <property name="hibernate.search.backend.multi_tenancy.strategy" value="discriminator"/>

With this changes my applications crashes on startup with:

Caused by: org.hibernate.search.util.common.SearchException: HSEARCH000520: Hibernate Search encountered failures during bootstrap. Failures:

    default backend: 
        failures: 
          - HSEARCH000501: Invalid value for configuration property 'hibernate.search.backend.multi_tenancy.strategy': 'discriminator'. HSEARCH600149: Invalid backend configuration: mapping requires single-tenancy but multi-tenancy strategy is set.

How can i configure discriminator based Multitenancy for HibernateSearch?
Iam using Hibernate 6.0.2.Final and Hibernate Search 6.1.8.Final.

2

Hey,
Hibernate ORM discriminator multitenancy support in Hibernate Search is going to be added in 7.0 – [HSEARCH-4403] - Hibernate JIRA

3

Right, I’ll update the issue as it’s not only about outbox-polling in the end.

EDIT: This change in particular will solve a problem that exists even without outbox-polling coordination: