2017-01-17 16:45:04 [scrapy.core.engine] ERROR: Scraper close failure
Traceback (most recent call last):
  File "/home/bruno/.local/lib/python2.7/site-packages/twisted/internet/defer.py", line 651, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/home/bruno/crawler_questoes/qual_concurso/qual_concurso/pipelines.py", line 66, in close_spider
    self.exporter.finish_exporting()
AttributeError: 'JsonWriterPipeline' object has no attribute 'exporter'
Unhandled error in Deferred:
2017-01-17 16:45:04 [twisted] CRITICAL: Unhandled error in Deferred:

2017-01-17 16:45:04 [twisted] CRITICAL:
Traceback (most recent call last):
  File "/home/bruno/.local/lib/python2.7/site-packages/twisted/internet/defer.py", line 1299, in _inlineCallbacks
    result = g.send(result)
  File "/home/bruno/.local/lib/python2.7/site-packages/scrapy/crawler.py", line 90, in crawl
    six.reraise(*exc_info)
  File "/home/bruno/.local/lib/python2.7/site-packages/scrapy/crawler.py", line 74, in crawl
    yield self.engine.open_spider(self.spider, start_requests)
IOError: [Errno 2] No such file or directory: '../data/oab_questoes.json'