当堆缓存大小配置为MB时,Ehcache的非法反射访问警告

我使用Ehcache作为hibernate的查询缓存,下面是我的Ehcache配置。

<cache alias="default-query-results-region">
    <key-type>org.hibernate.cache.spi.QueryKey</key-type>
    <value-type>java.lang.Object</value-type>
    <expiry>
        <ttl unit="seconds">30</ttl>
    </expiry>
    <resources>
        <heap unit="MB">1</heap>
        <offheap unit="MB">2</offheap>
    </resources>
</cache>

当我执行应用程序时,控制台会记录以下警告。

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.ehcache.sizeof.ObjectGraphWalker (file:/C:/Users/<my_username>/.m2/repository/org/ehcache/ehcache/3.9.4/ehcache-3.9.4.jar) to field java.util.ArrayList.elementData
WARNING: Please consider reporting this to the maintainers of org.ehcache.sizeof.ObjectGraphWalker
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

但是如果我将堆单元指定为 entries .

<heap unit="entries">2</heap>

下面是我正在使用的Ehcache版本。

<dependency>
    <groupId>org.ehcache</groupId>
    <artifactId>ehcache</artifactId>
    <version>3.9.4</version>
</dependency>

下面是我的hibernate配置,其中我指定了Ehcache作为缓存提供程序。

<property name="hibernate.cache.use_query_cache">true</property>
<property name="hibernate.cache.region.factory_class">org.hibernate.cache.jcache.JCacheRegionFactory</property>
<property name="hibernate.javax.cache.provider">org.ehcache.jsr107.EhcacheCachingProvider</property>
<property name="hibernate.javax.cache.uri">ehcache.xml</property>

我正在使用 OpenJDK 11 .

这一警告的原因是什么?我有什么办法可以修吗?