The following Wildfly 10.0.0.Final Datasource configuration via CLI... # Via CLI # cd C:\dev\tools\wildfly-10.1.0.Final\ # bin\jboss-cli.bat module add \ --name=org.postgres \ --resources=C:\Users\user\Downloads\postgresql-9.4.1209.jar \ --dependencies=javax.api,javax.transaction.api /subsystem=datasources/jdbc-driver=postgres:add( \ driver-name= "postgres" , \ driver-module-name= "org.postgres" , \ driver- class- name=org.postgresql.Driver, \ driver-datasource- class- name=org.postgresql.ds.PGSimpleDataSource, \ driver-xa-datasource- class- name=org.postgresql.xa.PGXADataSource ) data-source add \ --name=Postgres_MY_APP_DS \ --driver-name=postgres \ --jndi-name=java:/MY_APP_DS \ --valid-connection-checker- class- name=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker \ --exception-sorter- class- name=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter \ --connection-url=jdbc:postgresql: //localhost:5432/myapp \ --user-name=myapp \ --password=myapp ... will produce the following exception in Wildfly 10.1.0.Final: { "WFLYCTL0080: Failed services" => { "org.wildfly.data-source.Postgres_MY_APP_DS" => "org.jboss.msc.service.StartException in service org.wildfly.data-source.Postgres_MY_APP_DS: WFLYJCA0033: Error during the deployment of Postgres_MY_APP_DS Caused by: org.jboss.msc.service.StartException in anonymous service: WFLYJCA0032: Unable to start the ds because it generated more than one cf "}," WFLYCTL0412: Required services that are not installed: " => [" org.wildfly.data-source.Postgres_MY_APP_DS "]," WFLYCTL0180: Services with missing/unavailable dependencies" => undefined} The following Wildfly 10.0.0.Final Datasource configuration via XML (standalone-full.xml)... <subsystem xmlns= "urn:jboss:domain:datasources:4.0" > <datasources> <datasource jndi-name= "java:/MY_APP_DS" pool-name= "Postgres_MY_APP_DS" > <connection-url> jdbc:postgresql://localhost:5432/myapp </connection-url> <driver> postgres </driver> <security> <user-name> myapp </user-name> <password> myapp </password> </security> <validation> <valid-connection-checker class-name= "org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker" /> <exception-sorter class-name= "org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter" /> </validation> </datasource> <drivers> <driver name= "postgres" module= "org.postgres" > <driver-class> org.postgresql.Driver </driver-class> <xa-datasource-class> org.postgresql.xa.PGXADataSource </xa-datasource-class> <datasource-class> org.postgresql.ds.PGSimpleDataSource </datasource-class> </driver> </drivers> </datasources> </subsystem> ... will produce the following Stacktrace on Wildfly 10.1.0.Final Application Server Startup: 14:16:16,583 ERROR [org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService$AS7DataSourceDeployer] (MSC service thread 1-5) Error during the deployment of java:/MY_APP_DS: javax.resource.ResourceException: IJ031103: At least one connection property must be defined for datasource-class: org.postgresql.ds.PGSimpleDataSource at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createConnectionFactory(LocalManagedConnectionFactory.java:108) at org.jboss.jca.deployers.common.AbstractDsDeployer.deployDataSource(AbstractDsDeployer.java:772) at org.jboss.jca.deployers.common.AbstractDsDeployer.createObjectsAndInjectValue(AbstractDsDeployer.java:312) at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService$AS7DataSourceDeployer.deploy(AbstractDataSourceService.java:371) at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:149) at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948) at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang. Thread .run( Thread .java:745) 14:16:16,588 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-5) MSC000001: Failed to start service org.wildfly.data-source.Postgres_MY_APP_DS: org.jboss.msc.service.StartException in service org.wildfly.data-source.Postgres_MY_APP_DS: WFLYJCA0033: Error during the deployment of Postgres_MY_APP_DS at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:163) at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948) at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang. Thread .run( Thread .java:745) Caused by: org.jboss.msc.service.StartException in anonymous service: WFLYJCA0032: Unable to start the ds because it generated more than one cf at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:151) ... 5 more ..... 14:16:17,470 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread ) WFLYCTL0013: Operation ( "add" ) failed - address: ([ ( "subsystem" => "datasources" ), ( "data-source" => "Postgres_MY_APP_DS" ) ]) - failure description: { "WFLYCTL0080: Failed services" => { "org.wildfly.data-source.Postgres_MY_APP_DS" => "org.jboss.msc.service.StartException in service org.wildfly.data-source.Postgres_MY_APP_DS: WFLYJCA0033: Error during the deployment of Postgres_MY_APP_DS Caused by: org.jboss.msc.service.StartException in anonymous service: WFLYJCA0032: Unable to start the ds because it generated more than one cf"}, "WFLYCTL0412: Required services that are not installed:" => [ "org.wildfly.data-source.Postgres_MY_APP_DS" ], "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined } 14:16:17,473 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread ) WFLYCTL0013: Operation ( "add" ) failed - address: ([ ( "subsystem" => "datasources" ), ( "data-source" => "Postgres_MY_APP_DS" ) ]) - failure description: { "WFLYCTL0080: Failed services" => { "org.wildfly.data-source.Postgres_MY_APP_DS" => "org.jboss.msc.service.StartException in service org.wildfly.data-source.Postgres_MY_APP_DS: WFLYJCA0033: Error during the deployment of Postgres_MY_APP_DS Caused by: org.jboss.msc.service.StartException in anonymous service: WFLYJCA0032: Unable to start the ds because it generated more than one cf"}, "WFLYCTL0412: Required services that are not installed:" => [ "org.wildfly.data-source.Postgres_MY_APP_DS" , "org.wildfly.data-source.Postgres_MY_APP_DS" ], "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined } Other examples The following configuration is similar and would also fail: http://www.nailedtothex.org/roller/kyle/entry/registering-postgresql-jdbc-driver-datasource