Hello Luis, The path to persistence.xml you've found in the logs is the default location of persistence.xml for Keycloak's main module (server-war). But it is unused, since Keycloak uses custom persistence.xml location: https://github.com/keycloak/keycloak/blob/master/model/jpa/src/main/java/... You can use the same method (or at least the same technique) to load yours. Cheers, Dmitry Telegin CTO, Acutus s.r.o. Keycloak Consulting and Training Pod lipami street 339/52, 130 00 Prague 3, Czech Republic +42 (022) 888-30-71 E-mail: info(a)acutus.pro On Thu, 2018-11-22 at 11:18 +0100, Luis Rodríguez Fernández wrote: > Hello there, > > I am using the standalone server distribution [1]. > > We need to extend the keycloak server [2] and we need to access a third > party database to get some data. > > I developed a sample domain extension based on the keycloak example domain > extension [3]. The deployment of this example one works at the first try, > thanks!!! > > My sample domain extension access a third party database (mysql), so in > wildfly... > > - I install the mysql driver > - I create a datasource > > ... and in my sample I create a META-INF/persistence.xml > > <persistence version> > <persistence-unit name="JavaHelps" transaction-type="RESOURCE_LOCAL"> > <non-jta-data-source>java:/MySqlDS</non-jta-data-source> > <class>my.entity.Class</class> > <properties> > <property name="hibernate.dialect" > value="org.hibernate.dialect.MySQLDialect"/> > </properties> > </persistence-unit> > </persistence> > > I add my sample $KEYCLOAK_HOME/bin/jboss-cli.sh --command="module add > --name=... > > And it seems that wildfly likes evrything (from standard output), you can > see below part of the wildfly output at startup time. However when I run it > I get: > > Uncaught server error: java.lang.ExceptionInInitializerError.... Caused by: > javax.persistence.PersistenceException: No Persistence provider for > EntityManager named JavaHelps > > I found a workaround: having a deeper look at the standard output I saw > this message... > > parse checking if > "$KEYCLOAK_HOMEl/modules/system/layers/keycloak/org/keycloak/keycloak-server-subsystem/main/server-war/WEB-INF/classes/META-INF/persistence.xml" > exists, result = false > 10:59:55,279 TRACE [org.jboss.as.jpa] (MSC service thread 1-1) parsed > persistence unit definitions for war server-war > > ... so if I copy my persistence.xml to that location my domain extension > sample WORKS! My question is WHY??? > > Any thoughts on this? > > Thanks in advance, > > Luis > > [1] > https://downloads.jboss.org/keycloak/4.6.0.Final/keycloak-4.6.0.Final.zip > [2] > https://www.keycloak.org/docs/latest/server_development/index.html#_exten... > [3] > https://github.com/keycloak/keycloak/tree/master/examples/providers/domai... > > 10:59:54,575 INFO [org.jboss.as.connector.subsystems.datasources] > (ServerService Thread Pool -- 28) WFLYJCA0005: Deploying non-JDBC-compliant > driver class com.mysql.jdbc.Driver (version 5.1) > > 10:59:55,071 INFO [org.jboss.as.connector.subsystems.datasources] (MSC > service thread 1-8) WFLYJCA0001: Bound data source [java:/MySqlDS] > > 10:59:55,158 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) parse > checking if > "/content/domain-extension-example.jar/META-INF/persistence.xml" exists, > result = true > 10:59:55,163 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) parse > persistence.xml: attribute value(0) = JavaHelps > 10:59:55,163 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) parse > persistence.xml: attribute value(1) = RESOURCE_LOCAL > 10:59:55,164 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) parse > persistence.xml: element=non-jta-data-source > 10:59:55,164 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) parse > persistence.xml: element=class > 10:59:55,164 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) parse > persistence.xml: element=properties > 10:59:55,165 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) parse > persistence.xml: reached ending persistence-unit tag > 10:59:55,165 INFO [org.jboss.as.jpa] (MSC service thread 1-7) WFLYJPA0002: > Read persistence.xml for JavaHelps > 10:59:55,166 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) > PersistenceUnitMetadataImpl(version=2.1) [ > name: JavaHelps > jtaDataSource: null > nonJtaDataSource: java:/MySqlDS > transactionType: RESOURCE_LOCAL > provider: org.hibernate.jpa.HibernatePersistenceProvider > classes[ > com.javahelps.jpa.Student ] > packages[ > ] > mappingFiles[ > ] > jarFiles[ > ] > validation-mode: AUTO > shared-cache-mode: UNSPECIFIED > properties[ > hibernate.dialect: org.hibernate.dialect.MySQLDialect > ]] > 10:59:55,167 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) parsed > persistence unit definitions for jar domain-extension-example.jar > 10:59:55,168 TRACE [org.jboss.as.jpa] (MSC service thread 1-7) incrementing > PU count for domain-extension-example.jar by 1 > 10:59:55,174 DEBUG [org.jboss.as.jpa] (MSC service thread 1-3) added > javax.persistence.api dependency to domain-extension-example.jar > 10:59:55,174 DEBUG [org.jboss.as.jpa] (MSC service thread 1-3) added > org.hibernate.bytecodetransformer dependency to domain-extension-example.jar > 10:59:55,175 DEBUG [org.jboss.as.jpa] (MSC service thread 1-3) added > org.jboss.as.jpa dependency to domain-extension-example.jar > 10:59:55,175 DEBUG [org.jboss.as.jpa] (MSC service thread 1-3) added > org.jboss.as.jpa.spi dependency to domain-extension-example.jar > 10:59:55,175 DEBUG [org.jboss.as.jpa] (MSC service thread 1-3) added > (default provider) org.hibernate dependency to domain-extension-example.jar > (since 1 PU(s) didn't specify jboss.as.jpa.providerModule) > 10:59:55,175 DEBUG [org.jboss.as.jpa] (MSC service thread 1-3) added > org.hibernate dependency to domain-extension-example.jar > 10:59:55,196 TRACE [org.jboss.as.jpa] (MSC service thread 1-8) install > persistence unit definition for jar domain-extension-example.jar > 10:59:55,196 TRACE [org.jboss.as.jpa] (MSC service thread 1-8) adding > 'vfs:/content/domain-extension-example.jar/' to annotation index map > 10:59:55,196 TRACE [org.jboss.as.jpa] (MSC service thread 1-8) returning > global (module) Persistence Provider > org.hibernate.jpa.HibernatePersistenceProvider > 10:59:55,199 DEBUG [org.jboss.as.jpa] (MSC service thread 1-8) loaded > persistence provider adapter > org.jboss.as.jpa.hibernate5.HibernatePersistenceProviderAdaptor from > classloader ModuleClassLoader for Module "org.hibernate" version > 5.3.6.Final from local module loader @400cff1a (finder: local module finder > @275710fc (roots: > /media/hdd/keycloak-4.6.0.Final/modules,/media/hdd/keycloak-4.6.0.Final/modules/system/layers/keycloak,/media/hdd/keycloak-4.6.0.Final/modules/system/layers/base)) > 10:59:55,202 TRACE [org.jboss.as.jpa] (MSC service thread 1-8) add second > level cache dependencies with properties '{caches=entity, > container=hibernate}' > 10:59:55,203 TRACE [org.jboss.as.jpa] (MSC service thread 1-8) added > PersistenceUnitService (phase 1 of 2) for 'service > jboss.persistenceunit."domain-extension-example.jar#JavaHelps".__FIRST_PHASE__'. > PU is ready for injector action. > 10:59:55,204 TRACE [org.jboss.as.jpa] (MSC service thread 1-8) returning > global (module) Persistence Provider > org.hibernate.jpa.HibernatePersistenceProvider > 10:59:55,206 INFO > [org.keycloak.subsystem.server.extension.KeycloakProviderDeploymentProcessor] > (MSC service thread 1-4) Deploying Keycloak provider: > domain-extension-example.jar > 10:59:55,234 TRACE [org.jboss.as.jpa] (MSC service thread 1-6) install > persistence unit definition for jar domain-extension-example.jar > 10:59:55,234 TRACE [org.jboss.as.jpa] (MSC service thread 1-6) adding > 'vfs:/content/domain-extension-example.jar/' to annotation index map > 10:59:55,234 TRACE [org.jboss.as.jpa] (MSC service thread 1-6) returning > global (module) Persistence Provider > org.hibernate.jpa.HibernatePersistenceProvider > 10:59:55,235 TRACE [org.jboss.as.jpa] (MSC service thread 1-6) add second > level cache dependencies with properties '{caches=entity, > container=hibernate}' > 10:59:55,235 TRACE [org.jboss.as.jpa] (MSC service thread 1-6) added > PersistenceUnitService (phase 2 of 2) for 'service > jboss.persistenceunit."domain-extension-example.jar#JavaHelps"'. PU is > ready for injector action. > > 10:59:55,645 INFO [org.jboss.as.jpa] (ServerService Thread Pool -- 57) > WFLYJPA0010: Starting Persistence Unit (phase 1 of 2) Service > 'domain-extension-example.jar#JavaHelps' > 10:59:55,695 INFO [org.hibernate.jpa.internal.util.LogHelper] > (ServerService Thread Pool -- 57) HHH000204: Processing PersistenceUnitInfo > [ > name: JavaHelps > ...] > > 10:59:56,038 INFO [org.jboss.as.jpa] (ServerService Thread Pool -- 57) > WFLYJPA0010: Starting Persistence Unit (phase 2 of 2) Service > 'domain-extension-example.jar#JavaHelps' > >