code: private void handlePipeLining() {
          HttpServiceContextImpl sc = getHTTPContext();
          WsByteBuffer buffer = sc.returnLastBuffer();
          if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
              Tr.event(tc, "Pipelined request found: " + buffer);
          }
          sc.clear();
          // save it back so that we always release it
          sc.storeAllocatedBuffer(buffer);
          sc.disableBufferModification();
          EventEngine events = HttpDispatcher.getEventService();
          if (null != events) {
              Event event = events.createEvent(HttpPipelineEventHandler.TOPIC_PIPELINING);
              event.setProperty(CallbackIDs.CALLBACK_HTTPICL.getName(), this);
              events.postEvent(event);
          } else {
              // unable to dispatch work request, continue on this thread
              ready(getVirtualConnection());
          }
      }
docs: Handle a pipelined request discovered while closing the handling of the
  last request.