After enabling Tomcat 7's org.apache.catalina.core.ThreadLocalLeakPreventionListener, we found this while undeploying our webapp:
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@6ae3209a]) and a value of type [org.jgroups.protocols.TP.ProtocolAdapter] (value [locks (21)]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
SEVERE: The web application [/cms] created a ThreadLocal with key of type [org.jgroups.protocols.FlowControl$1] (value [org.jgroups.protocols.FlowControl$1@536c4bc7]) and a value of type [java.lang.Boolean] (value [false]) 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.
Jul 12, 2013 11:19:04 PM org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks