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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_2r13da9ef28ugjlemmqbtle6o8, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
import javax.management.*;
import javax.management.openmbean.CompositeData;
import com.sun.management.GarbageCollectionNotificationInfo;
import com.sun.management.GcInfo;

static AutoCloseable onGCNotification(final VF1<GarbageCollectionNotificationInfo> theListener) {
  final NotificationListener listener = new NotificationListener {
    public void handleNotification(Notification notification, O handback) {
      // extract garbage collection information from notification.
      GarbageCollectionNotificationInfo gcInfo = GarbageCollectionNotificationInfo.from((CompositeData) notification.getUserData());
      pcallF(theListener, gcInfo);
    }
  };

  for (GarbageCollectorMXBean gcBean : ManagementFactory.getGarbageCollectorMXBeans())
    ((NotificationEmitter) gcBean).addNotificationListener(listener, null, null);
    
  ret autoCloseable {
    for (GarbageCollectorMXBean gcBean : ManagementFactory.getGarbageCollectorMXBeans())
      ((NotificationEmitter) gcBean).removeNotificationListener(listener, null, null);
  };
}