def poll_job(self, job_key, timeoutSecs=10, retryDelaySecs=0.5, key=None, **kwargs):
    '''
    Poll a single job from the /Jobs endpoint until it is "status": "DONE" or "CANCELLED" or "FAILED" or we time out.
    '''
    params_dict = {}
    # merge kwargs into params_dict
    h2o_methods.check_params_update_kwargs(params_dict, kwargs, 'poll_job', False)

    start_time = time.time()
    pollCount = 0
    while True:
        result = self.do_json_request('3/Jobs.json/' + job_key, timeout=timeoutSecs, params=params_dict)
        # print 'Job: ', dump_json(result)

        if key:
            frames_result = self.frames(key=key)
            print 'frames_result for key:', key, dump_json(result)

        jobs = result['jobs'][0]
        description = jobs['description']
        dest = jobs['dest']
        dest_name = dest['name']
        msec = jobs['msec']
        status = jobs['status']
        progress = jobs['progress']
        print description, \
            "dest_name:", dest_name, \
            "\tprogress:", "%-10s" % progress, \
            "\tstatus:", "%-12s" % status, \
            "\tmsec:", msec
        
        if status=='DONE' or status=='CANCELLED' or status=='FAILED':
            h2o_sandbox.check_sandbox_for_errors()
            return result

        # what about 'CREATED'
        # FIX! what are the other legal polling statuses that we should check for?

        if not h2o_args.no_timeout and (time.time() - start_time > timeoutSecs):
            h2o_sandbox.check_sandbox_for_errors()
            emsg = "Job:", job_key, "timed out in:", timeoutSecs

            # for debug
            a = h2o.nodes[0].get_cloud()
            print "cloud.json:", dump_json(a)
            raise Exception(emsg)
            print emsg
            return None

        # check every other poll, for now
        if (pollCount % 2) == 0:
            h2o_sandbox.check_sandbox_for_errors()

        time.sleep(retryDelaySecs)
        pollCount += 1
Poll a single job from the /Jobs endpoint until it is "status": "DONE" or "CANCELLED" or "FAILED" or we time out.