Generator pipelines.flake_failure.update_monorail_bug_pipeline.UpdateMonorailBugPipeline(*(u'ENCODED:boHH6HlAZEbA0jDg7NHrcEFIN',), **{'analysis_urlsafe_key': u'ag9zfmZpbmRpdC1mb3ItbWVy5AELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCKtAWNocm9taXVtLmxpbnV4L2xpbnV4LXhlbmlhbC1yZWwvNDcyMy93ZWJraXRfbGF5b3V0X3Rlc3RzIG9uIFVidW50dS0xNi4wNC9kbWx5ZEhWa... (360 bytes))#8ba72a4661904df7973bb363a72dc164 raised exception. TypeError: __init__() takes at least 3 arguments (2 given) (/base/data/home/apps/s~findit-for-me/waterfall-backend:18823-46b441a.413776830528818424/third_party/pipeline/pipeline.py:2434)
Traceback (most recent call last):
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:18823-46b441a.413776830528818424/third_party/pipeline/pipeline.py", line 2158, in evaluate
    self, pipeline_key, root_pipeline_key, caller_output)
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:18823-46b441a.413776830528818424/third_party/pipeline/pipeline.py", line 1113, in _run_internal
    return self.run(*self.args, **self.kwargs)
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:18823-46b441a.413776830528818424/gae_libs/pipelines.py", line 253, in run
    result = self._RunImplWrapper(arg)
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:18823-46b441a.413776830528818424/libs/exceptions.py", line 45, in Wrapped
    raise exc_type, exc_type(new_message), exc_tb
  File "/base/data/home/apps/s~findit-for-me/waterfall-backend:18823-46b441a.413776830528818424/first_party/gae_ts_mon/third_party/oauth2client/util.py", line 132, in positional_wrapper
    return wrapped(*args, **kwargs)
TypeError: __init__() takes at least 3 arguments (2 given)

This error can be surfaced when Flake Analyzer attempts to log/update a bug on Monorail, however doesn't appear to be FA-specific. An example failed analysis:
https://findit-for-me.appspot.com/_ah/pipeline/status?root=5adb7dc4f8cd48ba918d6a83fb4e050e&auto=false (though this may not be useful)