multithreading - How to stop threads of tomcat which creating memory leak? -

we have installed java application on tomcat linux server. when shut down tomcat server getting following error messages in logs.

created threadlocal key of type [null] (value [null]) , value of type [org.apache.lucene.index.segmenttermenum] (value [org.apache.lucene.index.segmenttermenum@19a419a4]) failed remove when web application stopped. create memory leak.

can 1 me how stop these threads? , how prevent these error should not appear again?

please reply possible facing issue in our production cause slowing our web application. in advance..