Tomcat throws SEVERE warning when undeployed
<p>Tomcat version: 7.0.41 (also tried 8.0.32) <br>
JRE: 6u42 <br>
Wrote a very simple JAX-WS application (as a test). The application at the moment simply displays wsdl file when "?wsdl" is used and when a SOAP request is given, am just returning a string. <br></p>

<pre><code>@WebService
public class SOAPWithWS
{
    @WebMethod
    public String HelloTest(String sMessage)
    {
        return "Received : " + sMessage;
    }
}
</code></pre>

<p>When I try to undeploy the context, it gives me a warning as below:</p>

<pre><code>Mar 09, 2016 1:54:24 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/WS] created a ThreadLocal with key of type [com.sun.xml.bind.v2.runtime.Coordinator$1] (value [com.sun.xml.bind.v2.runtime.Coordinator$1@3e26faf2]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@712545be]) 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.
Mar 09, 2016 1:54:24 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/WS] created a ThreadLocal with key of type [com.sun.xml.bind.v2.ClassFactory$1] (value [com.sun.xml.bind.v2.ClassFactory$1@4605f6fa]) and a value of type [java.util.WeakHashMap] (value [{class com.sun.xml.ws.runtime.config.TubelineDefinition=java.lang.ref.WeakReference@3199bb00, class com.sun.xml.ws.runtime.config.TubeFactoryConfig=java.lang.ref.WeakReference@63c41670, class javax.xml.bind.annotation.adapters.CollapsedStringAdapter=java.lang.ref.WeakReference@5e9d463b, class com.sun.xml.ws.runtime.config.Tubelines=java.lang.ref.WeakReference@276dfc04, class javax.xml.bind.annotation.W3CDomHandler=java.lang.ref.WeakReference@25bc7ed5, class java.util.ArrayList=java.lang.ref.WeakReference@7a2ae54d, class com.sun.xml.ws.runtime.config.MetroConfig=java.lang.ref.WeakReference@163460e4, class com.sun.xml.ws.runtime.config.TubeFactoryList=java.lang.ref.WeakReference@48c5241f}]) 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.
Mar 09, 2016 1:54:24 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/WS] created a ThreadLocal with key of type [org.glassfish.gmbal.generic.OperationTracer$1] (value [org.glassfish.gmbal.generic.OperationTracer$1@6c6948c]) and a value of type [java.util.ArrayList] (value [[]]) 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.
</code></pre>

<p>This happens everytime I tested. The same doesn't happen on GlassFish server (just tried to test this scenario). Any idea what is happening and how to eliminate this problem?</p>