ThreadLocal leakage on redeploy

[stain]

If QueryExpander/IMS war file is redeployed to a running Tomcat instance, warning messages like the below are produced:

INFO: Undeploying context [/QueryExpander]
May 18, 2015 7:08:56 PM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [/QueryExpander] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/QueryExpander] created a ThreadLocal with key of type [com.sun.xml.bind.v2.runtime.Coordinator$1] (value [com.sun.xml.bind.v2.runtime.Coordinator$1@50f1a73a]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@2919fa5a]) 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.
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/QueryExpander] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@68833fca]) and a value of type [org.apache.cxf.jaxrs.ext.MessageContextImpl] (value [org.apache.cxf.jaxrs.ext.MessageContextImpl@d11c61]) 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.
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/QueryExpander] created a ThreadLocal with key of type [com.sun.xml.bind.v2.runtime.Coordinator$1] (value [com.sun.xml.bind.v2.runtime.Coordinator$1@50f1a73a]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@209e24b2]) 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.
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/QueryExpander] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@68833fca]) and a value of type [org.apache.cxf.jaxrs.ext.MessageContextImpl] (value [org.apache.cxf.jaxrs.ext.MessageContextImpl@6e7b32d8]) 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.
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/QueryExpander] created a ThreadLocal with key of type [com.sun.xml.bind.v2.runtime.Coordinator$1] (value [com.sun.xml.bind.v2.runtime.Coordinator$1@50f1a73a]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@5a473b92]) 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.
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/QueryExpander] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@68833fca]) and a value of type [org.apache.cxf.jaxrs.ext.MessageContextImpl] (value [org.apache.cxf.jaxrs.ext.MessageContextImpl@7a981c8b]) 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.
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/QueryExpander] created a ThreadLocal with key of type [com.sun.xml.bind.v2.runtime.Coordinator$1] (value [com.sun.xml.bind.v2.runtime.Coordinator$1@50f1a73a]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@187a288e]) 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.
May 18, 2015 7:08:56 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/QueryExpander] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@68833fca]) and a value of type [org.apache.cxf.jaxrs.ext.MessageContextImpl] (value [org.apache.cxf.jaxrs.ext.MessageContextImpl@7bfc8f2f]) 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.

This indicates a potential memory leak over time if the WAR is redeployed multiple times without restarting Tomcat.