由于Struts1.x中存在安全问题，我们正在将一个旧应用程序迁移到Struts2.5.26。在测试时，我注意到tiles在服务器启动时抛出了一个异常。

SEVERE: Exception sending context initialized event to listener instance of class org.apache.struts2.tiles.StrutsTilesListener
java.lang.AbstractMethodError: org.apache.tiles.startup.AbstractTilesInitializer.createContainerFactory(Lorg/apache/tiles/TilesApplicationContext;)Lorg/apache/tiles/factory/AbstractTilesContainerFactory;
    at org.apache.tiles.startup.AbstractTilesInitializer.createContainer(AbstractTilesInitializer.java:123)
    at org.apache.tiles.startup.AbstractTilesInitializer.initialize(AbstractTilesInitializer.java:70)
    at org.apache.tiles.web.startup.AbstractTilesListener.contextInitialized(AbstractTilesListener.java:62)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4992)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5490)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1083)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1880)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

Apr 21, 2021 8:21:29 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart

我们在web.xml中有以下内容

<context-param>
        <param-name>tilesDefinitions</param-name>
        <param-value>/WEB-INF/tiles-defs.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.apache.struts2.tiles.StrutsTilesListener</listener-class>
    </listener>

在web inf/lib文件夹中有以下jar

-rw-r--r-- 1 ryk6mkj 1049089  21175 Apr 20 15:21 tiles-el-2.2.2.jar
-rw-r--r-- 1 ryk6mkj 1049089 161001 Apr 20 15:22 tiles-core-2.2.2.jar
-rw-r--r-- 1 ryk6mkj 1049089  50740 Apr 20 15:22 tiles-jsp-2.2.2.jar
-rw-r--r-- 1 ryk6mkj 1049089  59739 Apr 20 15:22 tiles-servlet-2.2.2.jar
-rw-r--r-- 1 ryk6mkj 1049089  24466 Apr 20 15:22 tiles-template-2.2.2.jar
-rw-r--r-- 1 ryk6mkj 1049089  35898 Apr 20 15:22 tiles-api-2.2.2.jar
-rw-r--r-- 1 ryk6mkj 1049089  71270 Apr 20 15:36 tiles-request-api-1.0.0.jar
-rw-r--r-- 1 ryk6mkj 1049089  32629 Apr 20 15:54 tiles-portlet-2.2.2.jar

我在AbstractTileInitializer.java类中看到createcontainerfactory（）方法是抽象的。不确定它为什么不使用StrutsTileInitializer.java或其他实现？
有什么线索说明为什么会这样吗？