beetl有缓存吗？GroupTemplate.setSharedVars()问题请教?报错

@闲.大赋 你好，想跟你请教个问题：老大，我写了个Cache对象，里面有个get(String key)方法。将这个对象setSharedVars放到全局变量里面。现在情况是，我第一次访问页面的时候可以正常显示。但是从第二次开始就提示找不到get方法，报错如下：

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java.lang.NoSuchMethodError: com.jr123.core.common.JRCache.get(Ljava/lang/String;)Ljava/lang/Object;
at com.jr123.core.common.JRCache_get.value(Unknown Source)
at org.beetl.core.statement.VarAttribute.evaluate(VarAttribute.java:59)
at org.beetl.core.statement.VarRef.evaluate(VarRef.java:109)
at org.beetl.core.statement.JsonMapExpression.evaluate(JsonMapExpression.java:66)
at org.beetl.core.statement.TagStatement.execute(TagStatement.java:81)
at org.beetl.core.statement.BlockStatement.execute(BlockStatement.java:68)
at org.beetl.core.Tag.doBodyRender(Tag.java:61)
at org.beetl.core.Tag.getBodyContent(Tag.java:70)
at org.beetl.ext.tag.LayoutTag.render(LayoutTag.java:104)
at org.beetl.core.statement.TagStatement.runTag(TagStatement.java:108)
at org.beetl.core.statement.TagStatement.execute(TagStatement.java:87)
at org.beetl.core.statement.Program.execute(Program.java:70)
at org.beetl.core.Template.renderTo(Template.java:121)
at org.beetl.core.Template.renderTo(Template.java:87)
at org.beetl.ext.web.WebRender.render(WebRender.java:74)
at com.ramnight.rnext.RnBeetlRender.render(RnBeetlRender.java:25)

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还望老大指点