Warning: couldn ' t clear tomcat cache

When a file transfer function is recently implemented in a project, the following exception is always thrown in tomcat8 for each completed operation:

warning: couldn‘t clear tomcat cache java.lang.NoSuchFieldException: resourceEntries
    at java.lang.Class.getDeclaredField(Unknown Source)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.clearMap(LocalizedTextUtil.java:735)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.clearTomcatCache(LocalizedTextUtil.java:719)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.reloadBundles(LocalizedTextUtil.java:703)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.findDefaultText(LocalizedTextUtil.java:178)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.getDefaultMessage(LocalizedTextUtil.java:579)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:461)
    at com.opensymphony.xwork2.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:293)
    at org.apache.struts2.interceptor.FileUploadInterceptor.getTextMessage(FileUploadInterceptor.java:368)
    at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:277)
    at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
    at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
    at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
    at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:74)
    at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
    at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)

	 

While not affecting use, but maybe it is a time bomb! and decided to find out why. After searching, we found that there are probably two solutions:

Programme one:

Because Tomcat8 has no attribute resourceentries, it is better to change to TOMCAT7. But from tomcat8==>tomcat7 feeling in a setback, decisively rejecting this method.

Reference Link: http://blog.csdn.net/findbestoy/article/details/50756465

Scenario Two:

Upgrade struts version, struts2.0.9==>struts2.3.20, perfect problem solving, resolutely adopt this method!

struts2.3.20:http://download.csdn.net/detail/xyznad/9486393

Reference Link: http://blog.csdn.net/bigtree_3721/article/details/50866958

Warning: couldn ' t clear tomcat cache