ons-client版本1.8.4final,shutdown tomcat现内存泄漏问题

org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [ROOT] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@1db5a2a]) and a value of type [com.aliyun.openservices.shade.io.netty.util.internal.InternalThreadLocalMap] (value [com.aliyun.openservices.shade.io.netty.util.internal.InternalThreadLocalMap@14545e91]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.