input streams need to be explicitly closed

at org.apache.struts2.components.template.BaseTemplateEngine.getThemeProps()
needs explicitly closure of the input stream

I get this exception:
Input stream has been finalized or forced closed without being explicitly closed; stream instantiation reported in following stack trace
java.lang.Throwable
at com.sun.enterprise.loader.EJBClassLoader$SentinelInputStream.<init>(EJBClassLoader.java:1123)
at com.sun.enterprise.loader.EJBClassLoader$InternalJarURLConnection.getInputStream(EJBClassLoader.java:1216)
at java.net.URL.openStream(URL.java:1009)
at com.opensymphony.xwork2.util.ClassLoaderUtil.getResourceAsStream(ClassLoaderUtil.java:116)
at org.apache.struts2.components.template.BaseTemplateEngine.getThemeProps(BaseTemplateEngine.java:70)
at org.apache.struts2.components.template.Template.getPossibleTemplates(Template.java:67)
at org.apache.struts2.components.template.FreemarkerTemplateEngine.renderTemplate(FreemarkerTemplateEngine.java:85)
at org.apache.struts2.components.UIBean.mergeTemplate(UIBean.java:530)
at org.apache.struts2.components.UIBean.end(UIBean.java:484)