itext 5 的 HtmlPipelineContext 构造函数中的非法反射访问

Question

上下文：jdk11、springboot、itextpdf 5.5.13.3、ubuntu、eclipse

期间：

new HtmlPipelineContext(null);

贯穿

new CssAppliersImpl(new XMLWorkerFontProvider());

和最后

CssAppliersImpl(){// map builder inside }

出现

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.itextpdf.text.io.ByteBufferRandomAccessSource$1 (file:/home/awieclawski/.m2/repository/com/itextpdf/itextpdf/5.5.13.3/itextpdf-5.5.13.3.jar) to method java.nio.DirectByteBuffer.cleaner()
WARNING: Please consider reporting this to the maintainers of com.itextpdf.text.io.ByteBufferRandomAccessSource$1

问题：如何避免？

附言。

HtmlPipelineContext

实例建立之前：

        CSSResolver cssResolver = new StyleAttrCSSResolver();
        cssResolver.addCss(cssFile);
 //     cssFile is returned from XMLWorkerHelper.getCSS(getCssStream(path));
    }

并在

new HtmlPipelineContext(null);

的调试中发出信号：

com.sun.jdi.ClassNotLoadedException: Type has not been loaded occurred invoking method.