tomcat-redis-session 共享 异常解决：Race condition encountered: attempted to load session[xxx]

在使用tomcat-redis-session-manager 的时候，tomcat7 总是报错： 

 异常报告

消息 Race condition encountered: attempted to load session[xxx] which has been created but not yet serialized.

描述 服务器遇到一个意外的情况，阻止它完成请求。

例外情况

java.lang.IllegalStateException: Race condition encountered: attempted to load session[xxx] which has been created but not yet serialized.
 com.orangefunction.tomcat.redissessions.RedisSessionManager.loadSessionFromRedis(RedisSessionManager.java:398)
 com.orangefunction.tomcat.redissessions.RedisSessionManager.findSession(RedisSessionManager.java:324)
 org.apache.catalina.connector.Request.doGetSession(Request.java:3155)
 org.apache.catalina.connector.Request.getSessionInternal(Request.java:2747)
 com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve.invoke(RedisSessionHandlerValve.java:28)
 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
 org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)
 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
 org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1201)
 org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:654)
 org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2532)
 org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2521)
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
 org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
 java.lang.Thread.run(Thread.java:745)
):注意 主要问题的全部 stack 信息可以在 server logs 里查看

解决办法：

使用以下 jar

tomcat-redis-session-manager-tomcat-7-Java文档类资源-CSDN下载