TOMCAT版本：9.0.12
下载JAR包：spymemcached-2.12.3.jar；memcached-session-manager-tc9-2.3.0.jar；memcached-session-manager-2.3.0.jar， 将这些JAR放入TOMCAT/lib目录下；
配置TOMCAT/conf/server.xml文件：
<Context reloadable="true" path="/mytest" docBase="mytest">
启动TOMCAT,报错如下：
严重 [main] org.apache.catalina.core.StandardContext.startInternal The session manager failed to start
org.apache.catalina.LifecycleException: Failed to start component [MemcachedBackupSessionManager[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/mytest]]]
at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:441)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5126)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:944)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:944)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:261)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:682)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:350)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492)
Caused by: java.lang.RuntimeException: Could not create transcoder factory.
at de.javakaffee.web.msm.MemcachedSessionService.getTranscoderFactory(MemcachedSessionService.java:507)
at de.javakaffee.web.msm.MemcachedSessionService.createTranscoderService(MemcachedSessionService.java:499)
at de.javakaffee.web.msm.MemcachedSessionService.startInternal(MemcachedSessionService.java:453)
at de.javakaffee.web.msm.MemcachedBackupSessionManager.startInternal(MemcachedBackupSessionManager.java:540)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
... 29 more
Caused by: java.lang.ClassCastException: class de.javakaffee.web.msm.JavaSerializationTranscoderFactory
at java.base/java.lang.Class.asSubclass(Class.java:3641)
at de.javakaffee.web.msm.MemcachedSessionService.loadTranscoderFactoryClass(MemcachedSessionService.java:541)
at de.javakaffee.web.msm.MemcachedSessionService.createTranscoderFactory(MemcachedSessionService.java:526)
at de.javakaffee.web.msm.MemcachedSessionService.getTranscoderFactory(MemcachedSessionService.java:505)
... 33 more
请帮忙看看是什么问题
