java.lang.reflect.InvocationTargetException这个错是什么意思？
这个错误是什么意思，网上找了好久没找到原因，请大家帮忙看一下，谢谢
15:30:25,352 ERROR BaseAction:74 -
java.lang.reflect.InvocationTargetException
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  at java.lang.reflect.Method.invoke(Method.java:597)
  at com.haoyishi.framework.control.BaseAction.execute(BaseAction.java:65)
  at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
  at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
  at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:1
98)
  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at com.haoyishi.or.client.RightCheckFilter.doFilter(RightCheckFilter.java:224)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at com.haoyishi.or.servlet.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:161)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
  at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
  at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
  at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
  at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.OutOfMemoryError: Java heap space