I use AttributeConverter([^ConnectionStateConverter.java]) to convert enum value([^ConnectionState.java]). It run perfect normal when use "Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME)"([^persistence.xml]) to initialize the JPA runtime. But when I deploy it into WildFly as a EJB( [^persistence-wildfly.xml]), the JPA runtime initialization failed with the following exception:

Caused by: javax.persistence.PersistenceException: [PersistenceUnit: SensorNetwork] Unable to build Hibernate SessionFactory
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:953)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:883)
at org.jboss.as.jpa.hibernate5.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:167)
... 7 more
Caused by: org.hibernate.MappingException: No Dialect mapping for JDBC type: 1899073220
at org.hibernate.dialect.TypeNames.get(TypeNames.java:70)
at org.hibernate.dialect.TypeNames.get(TypeNames.java:101)
at org.hibernate.dialect.Dialect.getTypeName(Dialect.java:342)
at org.hibernate.spatial.dialect.mysql.MySQL56SpatialDialect.getTypeName(MySQL56SpatialDialect.java:75)
at org.hibernate.mapping.Column.getSqlType(Column.java:231)
at org.hibernate.tool.schema.internal.AbstractSchemaValidator.validateColumnType(AbstractSchemaValidator.java:156)
at org.hibernate.tool.schema.internal.AbstractSchemaValidator.validateTable(AbstractSchemaValidator.java:143)
at org.hibernate.tool.schema.internal.GroupedSchemaValidatorImpl.validateTables(GroupedSchemaValidatorImpl.java:42)
at org.hibernate.tool.schema.internal.AbstractSchemaValidator.performValidation(AbstractSchemaValidator.java:89)
at org.hibernate.tool.schema.internal.AbstractSchemaValidator.doValidation(AbstractSchemaValidator.java:68)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:65)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:476)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:422)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:880)

In the Full log of Wildfly: [^server.log] , i notice the following infomation:

2017-11-22 15:02:25,396 DEBUG [org.hibernate.cfg.annotations.SimpleValueBinder] (ServerService Thread Pool – 13) Starting fillSimpleValue for connectionState
2017-11-22 15:02:25,396 DEBUG [org.hibernate.cfg.annotations.SimpleValueBinder] (ServerService Thread Pool – 13) Applying JPA AttributeConverter [org.hibernate.boot.internal.AttributeConverterDescriptorImpl@1e0c7d11] to [com.tekview.transview.sensornetwork.model.Lamppost:connectionState]
2017-11-22 15:02:25,396 DEBUG [org.hibernate.type.descriptor.sql.JdbcTypeJavaClassMappings] (ServerService Thread Pool – 13) JDBC type code mapping not known for class [java.lang.Short]; using custom code [1899073220]
2017-11-22 15:02:25,396 DEBUG [org.hibernate.type.descriptor.converter.AttributeConverterTypeAdapter] (ServerService Thread Pool – 13) Created AttributeConverterTypeAdapter -> converted::com.tekview.transview.sensornetwork.persist.converter.ConnectionStateConverter

When I refactor my code ConnectionStateConverter with the new one:
public class ConnectionStateConverter implements AttributeConverter<ConnectionState, Integer>, everything goes ok.

Why?