tomcat memory leak

pennate

tomcat memory leak



 

Mar 18, 2010 11:13:07 PM org.apache.catalina.core.ApplicationContext log
INFO: HTMLManager: stop: Stopping web application at '/testWeb'
Mar 18, 2010 11:13:07 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: A web application appears to have started a thread named [leakingThread] but has failed to stop it. This is very likely to create a memory leak.
public class LeakingServlet extends HttpServlet {
private Thread leakingThread;
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
if (leakingThread == null) {
synchronized (this) {
if (leakingThread == null) {
leakingThread = new Thread("leakingThread") {
@Override
public void run() {
synchronized (this) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
};
leakingThread.setDaemon(true);
leakingThread.setContextClassLoader(null);
leakingThread.start();
}
}
}
response.getWriter().println("Hello world!");
}
}
 需要把子线程的classloader设置为空（eakingThread.setContextClassLoader(null);），
不受主线程的管理，当tomcatstop的时候就不会检测
内存泄露了。
http://wiki.apache.org/tomcat/MemoryLeakProtection#cclThreadSpawnedByWebApp