javax.persistence.PersistenceException:の意味を教えていただけますか?

STS4でサーバー実行した時に下記のエラーが出ました｡

javax.persistence.PersistenceException: Unable to build entity manager factory
	at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:83)
	at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
	at jp.co.amiactive.servletContext.EMF.contextInitialized(EMF.java:20)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4900)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5363)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1410)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1400)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

実行した時だけにエラーが出ていて､実行していないときは問題にエラーは出ていません｡

自分で探してみてpersistence.xmlに原因があると思って下記の記述にしてみましたがそれでも解決しませんでした｡

persistence.xml
1<?xml version="1.0" encoding="UTF-8"?>
2<persistence version="2.1"
3    xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
5	<persistence-unit name="persistenceUnit"
6		transaction-type="RESOURCE_LOCAL">
7		<provider>org.hibernate.ejb.HibernatePersistence</provider>
8		<properties>
9			<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
10			<property name="javax.persistence.jdbc.driver" value="oracle.jdbc.OracleDriver" />
11			<property name="javax.persistence.ユーアールエル" value="jdbc:oracle:thin:接続詳細" />
12			<property name="名前" value="ユーザー名" />
13			<property name="javax.persistence.jdbc.password" value="パスワード" />
14		</properties>
15	</persistence-unit>
16</persistence>
17