findSession Error occurred while de-serializing the session object..

[posondlq]

[http-nio-8080-exec-5] tomcat.request.session.redis.SessionManager.findSession Error occurred while de-serializing the session object..
java.lang.NullPointerException
at org.apache.catalina.session.StandardSession.doReadObject(StandardSession.java:1604)
at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1077)
at tomcat.request.session.Session.readObjectData(Session.java:125)
at tomcat.request.session.SerializationUtil.deserializeSessionData(SerializationUtil.java:74)
at tomcat.request.session.redis.SessionManager.findSession(SessionManager.java:160)
at tomcat.request.session.redis.SessionManager.findSession(SessionManager.java:28)
at org.apache.catalina.connector.Request.doGetSession(Request.java:3008)
at org.apache.catalina.connector.Request.getSessionInternal(Request.java:2729)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:463)
at tomcat.request.session.redis.SessionHandlerValve.invoke(SessionHandlerValve.java:29)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

For this error, I am using the following library file:

tomcat-cluster-redis-session-manager-3.0
jedis-2.9.0.jar
one server tomcat 8.5.34
the other server tomcat 8.5.65

There are two services, one writes to session, and the other reports an error when reading.

[posondlq]

After step into tracking，Session newSession = createEmptySession(); newSession is null。