连接在60s之后断开，并未保持 about jprotobuf-rpc-socket HOT 4 CLOSED

<bean id="userProfileRpcService" class="com.baidu.jprotobuf.pbrpc.spring.HaRpcProxyFactoryBean"
          p:serviceInterface="com......UserProfileRpcService"
          p:onceTalkTimeout="20000"
          p:lookupStubOnStartup="false"
          p:idleTimeout="600"
          p:keepAlive="true"
          p:shortConnection="false"
          p:threadPoolSize="50"
          p:namingService-ref="remoteEyrieNamingService"/>

    <util:list id="registerServices">
        <ref bean="userProfileRpcServiceImpl"/>
    </util:list>

    <bean class="com.baidu.jprotobuf.pbrpc.spring.RpcServiceExporter"
          p:servicePort="...."
          p:acceptorThreads="1"
          p:workThreads="15"
          p:registerServices-ref="registerServices"/>`