THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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In this particular case, the leak is detected, a message is logged and internal structures of the JDK (ThreadLocalMap) are modified to remove the reference to the ThreadLocal instance.TODO: add an example of log
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Mar 16, 2010 11:47:24 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: A web application created a ThreadLocal with key of type [test.MyThreadLocal] (value [test.MyThreadLocal@4dbb9a58]) and a value of type [test.MyCounter] (value [test.MyCounter@57922f46]) but failed to remove it when the web application was stopped. To prevent a memory leak, the ThreadLocal has been forcibly removed.
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Note: this particular leak was actually already cured by previous versions of tomcat, because static references of classes loaded by the webappclassloader are nullified (see later).
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