项目中使用了个quartz包，启动时提示Quartz version update check failed

<span style="font-family: Arial, Helvetica, sans-serif;">2015-09-13 00:12:02 AbstractBeanFactory.java DEBUG Returning cached instance of singleton bean 'sqlSessionFactory'</span>

2015-09-13 00:12:03 UpdateChecker.java DEBUG Quartz version update check failed: www.terracotta.org
2015-09-13 00:12:03 UpdateChecker.java DEBUG Update check failed: 
java.net.UnknownHostException: www.terracotta.org
  at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
  at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
  at java.net.Socket.connect(Socket.java:579)
  at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
  at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
  at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
  at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
  at sun.net.www.http.HttpClient.New(HttpClient.java:308)
  at sun.net.www.http.HttpClient.New(HttpClient.java:326)
  at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:997)
  at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:933)
  at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:851)
  at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1301)
  at net.sf.ehcache.util.UpdateChecker.getUpdateProperties(UpdateChecker.java:153)
  at net.sf.ehcache.util.UpdateChecker.doCheck(UpdateChecker.java:117)
  at net.sf.ehcache.util.UpdateChecker.checkForUpdate(UpdateChecker.java:104)
  at net.sf.ehcache.util.UpdateChecker.run(UpdateChecker.java:95)
  at java.util.TimerThread.mainLoop(Timer.java:555)
  at java.util.TimerThread.run(Timer.java:505)

<!-- 定时任务 -->
 <bean id="z" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list></list>
</property>
<property name="quartzProperties"> 
<props>
<!-- 主要是这个参数 -->
<prop key="org.quartz.scheduler.skipUpdateCheck">true</prop> 
</props>
</property>
</bean>

-Dorg.terracotta.quartz.skipUpdateCheck=true

System.setProperty("org.terracotta.quartz.skipUpdateCheck","true");