#vulnerable code 
                                public void stop()
    {
        if (State.TRANSCRIBING.equals(this.state))
        {
            if (logger.isDebugEnabled())
                logger.debug("Transcriber is now finishing up");

            StatsDClient dClient = JigasiBundleActivator.getDataDogClient();
            if(dClient != null)
            {
                dClient.increment(DD_ASPECT_STOP);
                if(logger.isDebugEnabled())
                {
                    logger.debug("thrown stat: " + DD_ASPECT_STOP);
                }
            }

            this.state = State.FINISHING_UP;
            this.executorService.shutdown();

            TranscriptEvent event = this.transcript.ended();
            fireTranscribeEvent(event);
            ActionServicesHandler.getInstance()
                .notifyActionServices(this, event);

            checkIfFinishedUp();
        }
        else
        {
            logger.warn("Trying to stop Transcriber while it is " +
                            "already stopped");
        }
    } 
                            #location 21 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                public void stop()
    {
        if (State.TRANSCRIBING.equals(this.state))
        {
            if (logger.isDebugEnabled())
                logger.debug("Transcriber is now finishing up");

            updateDDClient(DD_ASPECT_STOP);

            this.state = State.FINISHING_UP;
            this.executorService.shutdown();

            TranscriptEvent event = this.transcript.ended();
            fireTranscribeEvent(event);
            ActionServicesHandler.getInstance()
                .notifyActionServices(this, event);

            checkIfFinishedUp();
        }
        else
        {
            logger.warn("Trying to stop Transcriber while it is " +
                            "already stopped");
        }
    }