多线程导致的序列化java.io.OptionalDataExc

最终原因：并发修改一个map同时又rpc调用，服务端反序列化失败

exceptionStack=java.io.OptionalDataException: [12j5aT-1nOH8KGx3C8NT]nullat java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1555)at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)at java.util.HashMap.readObject(HashMap.java:1402)at sun.reflect.GeneratedMethodAccessor62.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2136)at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2027)at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535)at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)at java.util.HashMap.readObject(HashMap.java:1404)at sun.reflect.GeneratedMethodAccessor62.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2136)at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2027)at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535)at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)at java.util.HashMap.readObject(HashMap.java:1404)at sun.reflect.GeneratedMethodAccessor62.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2136)at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2027)at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535)at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)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:799)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)at org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor.doRun(Nio2Endpoint.java:1697)at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)at org.apache.tomcat.util.net.AbstractEndpoint.processSocket(AbstractEndpoint.java:946)at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$4.completed(Nio2Endpoint.java:626)at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$4.completed(Nio2Endpoint.java:604)at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)at sun.nio.ch.Invoker$2.run(Invoker.java:218)at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748), requestId=null]at