Attempts counter resets everytime on queue.next()

[psawaikar]

1. Defined
   queue = MongoQueue(
   ... Connection(TEST_DB).doctest_queue,
   ... consumer_id="consumer-1",
   ... timeout=300,
   ... max_attempts=3)

2. Then got job by ----- job = queue.next()

3. Job has error ---- job.error("Error") ------- here attempts counter incremented to 2

4. Then again got the same job by ----- job = queue.next() ------ but attempts counter got reset to 1

Question : how will the job be marked failed is attempts counter gets reset?