kawa and apache tomcat

[Damien MATTEI <Damien.Mattei@unice.fr>]

hi,

i 'm developping and testing a servlet application in tomcat 8 using some kawa code byte-compiled for java, so there is pure java code  and kawa code hosted on the apache tomcat web server,
all works fine but i noticed this when stopping the application (named Sidonie) in tomcat manager, tomcat complains about this in the log files:

15-Jan-2016 11:08:49.115 SEVERE [http-nio-8080-exec-12] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [Sidonie] created a ThreadLocal with key of type [gnu.mapping.Environment.InheritedLocal] (value [gnu.mapping.Environment$InheritedLocal@3dc806b8]) and a value of type [gnu.mapping.InheritingEnvironment] (value [#<environment http-nio-8080-exec-19>]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
15-Jan-2016 11:08:49.116 SEVERE [http-nio-8080-exec-12] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [Sidonie] created a ThreadLocal with key of type [java.lang.InheritableThreadLocal] (value [java.lang.InheritableThreadLocal@7927031f]) and a value of type [kawa.standard.Scheme] (value [kawa.standard.Scheme@3070d094]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
15-Jan-2016 11:08:49.116 SEVERE [http-nio-8080-exec-12] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [Sidonie] created a ThreadLocal with key of type [gnu.mapping.ThreadLocation.ThreadLocalWithDefault] (value [gnu.mapping.ThreadLocation$ThreadLocalWithDefault@599f5a94]) and a value of type [gnu.math.IntNum] (value [10]) 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.
15-Jan-2016 11:08:49.116 SEVERE [http-nio-8080-exec-12] org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks The web application [Sidonie] created a ThreadLocal with key of type [gnu.mapping.ThreadLocation.ThreadLocalWithDefault] (value [gnu.mapping.ThreadLocation$ThreadLocalWithDefault@6b51425b]) and a value of type [gnu.kawa.io.BinaryOutPort] (value [gnu.kawa.io.BinaryOutPort@4cf02060]) 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 message appear the same number of times as the kawa code is called ,for example if i reload the web page which call again the kawa code i will  have two instance of this message in log ...

for info my kawa code are called after a Scheme.registerEnvironment();

tomcat seems cannot be able to free some kawa ressource, perheaps i should free them by myself in  the code but scheme and java have their own garbage collector and normally deallocate ressource when no more in use, i use files with diffrent method too, when i do an 
open ,i close the file at end but not always when using some method such as gnu.list.blob...

any ideas?

regards,
damien 
-- 
Damien.Mattei@unice.fr, Damien.Mattei@oca.eu, UNS / OCA / CNRS