java - Unable to build Hibernate SessionFactory -

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hello i'm experiencing error when trying build entitymanager hibernate.

...info  | 2016-07-28 14:55:20 | [main] internal.pooledconnections (pooledconnections.java:39) - hhh000115: hibernate connection pool size: 20 (min=1) info  | 2016-07-28 14:55:20 | [main] dialect.dialect (dialect.java:153) - hhh000400: using dialect: org.hibernate.dialect.postgresql95dialect info  | 2016-07-28 14:55:20 | [main] internal.lobcreatorbuilderimpl (lobcreatorbuilderimpl.java:124) - hhh000424: disabling contextual lob creation createclob() method threw error : java.lang.reflect.invocationtargetexception info  | 2016-07-28 14:55:20 | [main] type.basictyperegistry (basictyperegistry.java:148) - hhh000270: type registration [java.util.uuid] overrides previous : org.hibernate.type.uuidbinarytype@550a1967 exception in thread "main" javax.persistence.persistenceexception: [persistenceunit: entitymanager] unable build hibernate sessionfactory @ org.hibernate.jpa.boot.internal.entitymanagerfactorybuilderimpl.persistenceexception(entitymanagerfactorybuilderimpl.java:961) @ org.hibernate.jpa.boot.internal.entitymanagerfactorybuilderimpl.build(entitymanagerfactorybuilderimpl.java:891) @ org.hibernate.jpa.hibernatepersistenceprovider.createentitymanagerfactory(hibernatepersistenceprovider.java:58)...

my persistence xml is:

<persistence xmlns="http://java.sun.com/xml/ns/persistence"          xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"          xsi:schemalocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"          version="2.0"> <persistence-unit name="entitymanager">     <provider>org.hibernate.jpa.hibernatepersistenceprovider</provider>     <class>resultstorage.benchmarkresult</class>     <properties>         <property name="hibernate.dialect" value="org.hibernate.dialect.postgresql95dialect"/>         <property name="hibernate.connection.driver_class" value="org.postgresql.driver"/>         <property name="hibernate.connection.username" value="postgres"/>         <property name="hibernate.connection.password" value="12345"/>         <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/postgres"/>         <property name="connection_pool_size" value="1"/>         <property name="hibernate.hbm2ddl.auto" value="create"/>         <property name="hibernate.format_sql" value="true"/>         <property name="show_sql" value="true"/>     </properties> </persistence-unit>

the annotated class im mapping is: package resultstorage;

import org.hibernate.annotations.genericgenerator;  import javax.persistence.*; import javax.persistence.metamodel.basictype; import java.util.date;  @entity @table(name = "benchmarkresults") public class benchmarkresult { private long id; private string usecase; private date time; private string server; private long result;  public benchmarkresult(string usecase, date time, string server, long result) {     this.usecase = usecase;     this.time = time;     this.server = server;     this.result = result; }  @id @column(name = "id") @generatedvalue(generator="increment") @genericgenerator(name="increment", strategy = "increment") public long getid() {     return id; }  @basic @column(name = "usecase") public string getusecase() {     return usecase; }  @temporal(temporaltype.timestamp) @column(name = "time") public date gettime() {     return time; }  @basic @column(name = "hostname") public string getserver() {     return server; }  @basic @column(name = "result") public long getresult() {     return result; }  public void setid(long id) {     this.id = id; }

}

can me on issue? in advance!


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