HDC调试需求开发（15万预算）,能者速来！>>>
在ubuntu虚拟机上用nginx+tomcat做负载均衡，为了实现session的共享，安装了memcached服务，并在tomcat的lib目录下导入了下列jar包：
asm-3.2.jar，couchbase-client-1.2.2.jar，kryo-1.03.jar，kryo-serializers-0.11.jar，memcached-session-manager-1.6.5.jar，memcached-session-manager-tc7-1.6.5.jar，minlog-1.2.jar，msm-kryo-serializer-1.6.5.jar，reflectasm-0.9.jar，spymemcached-2.10.3.jar
在tomcat的context.xml里面添加如下：
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:192.168.126.132:11211,n2:192.168.126.131:11211"
sticky="false"
sessionBackupAsync="false"
lockingMode="auto"
requestUriIgnorePattern=".*\.(png|gif|jpg|css|js){1}quot"
sessionBackupTimeout="1000"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>

tomca启动的时候没有报错，但是访问的时候就会报下面的错误，有没有知道的，求解啊！

Sep 06, 2016 6:09:45 PM de.javakaffee.web.msm.LockingStrategy onBackupWithoutLoadedSession WARNING: Found no validity info for session id 1F64837921904BFB8FA17328F56F75BC-n2Sep 06, 2016 6:09:45 PM org.apache.coyote.http11.AbstractHttp11Processor process SEVERE: Error processing request java.lang.NoSuchFieldError: attributes at de.javakaffee.web.msm.MemcachedBackupSession.getAttributesFiltered(MemcachedBackupSession.java:514) at de.javakaffee.web.msm.BackupSessionTask.call(BackupSessionTask.java:108) at de.javakaffee.web.msm.BackupSessionTask.call(BackupSessionTask.java:50) at de.javakaffee.web.msm.BackupSessionService$SynchronousExecutorService.submit(BackupSessionService.java:346) at de.javakaffee.web.msm.BackupSessionService.backupSession(BackupSessionService.java:205) at de.javakaffee.web.msm.MemcachedSessionService.backupSession(MemcachedSessionService.java:1076) at de.javakaffee.web.msm.RequestTrackingHostValve.backupSession(RequestTrackingHostValve.java:244) at de.javakaffee.web.msm.RequestTrackingHostValve.invoke(RequestTrackingHostValve.java:173) at de.javakaffee.web.msm.RequestTrackingHostValve.invoke(RequestTrackingHostValve.java:138) at de.javakaffee.web.msm.RequestTrackingHostValve.invoke(RequestTrackingHostValve.java:138) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)