Memcached和Tomcat 8不兼容

我想部署一個Grails應用程序到Tomcat 8.0.15。如果有問題，操作系統是CentOS 7，Java版本是1.7.0_71，memcached版本是1.4.20。Memcached和Tomcat 8不兼容

我使用Grails Standalone Tomcat plugin來使用memcached作爲會話管理器，它在Tomcat 7中運行良好。不幸的是，遷移到Tomcat 8並不像預期那麼簡單。

我發現這個公司的依賴關係中：de.javakaffee.msm:memcached-session-manager-tc7:1.6.4，所以我試圖將其更改爲tc8（存在於Maven）和更新各種其他插件的版本。

不幸的是，我碰到一個問題就來了，同時部署在Tomcat 8應用：

04-Feb-2015 16:26:08.371 INFO [http-nio-8080-exec-17] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /opt/tomcat/webapps/ROOT.war 
2015-02-04 16:26:18 ERROR [GrailsContextLoaderListener] Error initializing the application: loader constraint violation: when resolving overridden method "de.javakaffee.web.msm.MemcachedBackupSessionManager.changeSessionId(Lorg/apache/catalina/Session;)V" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, de/javakaffee/web/msm/MemcachedBackupSessionManager, and its superclass loader (instance of java/net/URLClassLoader), have different Class objects for the type ger.changeSessionId(Lorg/apache/catalina/Session;)V used in the signature 
java.lang.LinkageError: loader constraint violation: when resolving overridden method "de.javakaffee.web.msm.MemcachedBackupSessionManager.changeSessionId(Lorg/apache/catalina/Session;)V" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, de/javakaffee/web/msm/MemcachedBackupSessionManager, and its superclass loader (instance of java/net/URLClassLoader), have different Class objects for the type ger.changeSessionId(Lorg/apache/catalina/Session;)V used in the signature 
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2615) 
    at java.lang.Class.getDeclaredMethods(Class.java:1860) 
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) 
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:745)

總之，有一個叫changeSessionId方法，它是由類de.javakaffee.web.msm.MemcachedBackupSessionManager覆蓋，但是它有一些不同於什麼類加載器期待。

我在Google上找不到任何幫助，並嘗試更改很多版本和依賴項，結果無濟於事，所以我決定回滾到Tomcat 7.但是我想在此留下此情況，以免有人找到解決方案。

來源

2015-02-04 mathifonseca