oleksiys

         private final Filter filter;
         private boolean enabled;
+        private volatile FilterChain filterChain;
 
         FilterWrapper(Filter filter) {
             this.filter = filter;
         }
 
         public void enable() {
+            if (!enabled && filterChain != null) {

oleksiys

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.Connection;