Exception in thread SessionCloseThread:
Traceback (most recent call last):
  File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py", line 747, in close
    tf_session.TF_CloseSession(self._session)
tensorflow.python.framework.errors_impl.AbortedError: Session 2f3573599f279039 is not found. Possibly, this master has restarted.

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py", line 1356, in _do_call
    return fn(*args)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py", line 1341, in _run_fn
    options, feed_dict, fetch_list, target_list, run_metadata)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py", line 1429, in _call_tf_sessionrun
    run_metadata)
tensorflow.python.framework.errors_impl.AbortedError: Session 2f3573599f279039 is not found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/hypergan", line 146, in <module>
    gancli.run()
  File "/usr/local/lib/python3.6/dist-packages/hypergan/cli.py", line 324, in run
    self.train()
  File "/usr/local/lib/python3.6/dist-packages/hypergan/cli.py", line 268, in train
    self.train_tpu()
  File "/usr/local/lib/python3.6/dist-packages/hypergan/cli.py", line 249, in train_tpu
    session.run(train)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py", line 950, in run
    run_metadata_ptr)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py", line 1173, in _run
    feed_dict_tensor, options, run_metadata)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py", line 1350, in _do_run
    run_metadata)
  File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/client/session.py", line 1370, in _do_call
    raise type(e)(node_def, op, message)
tensorflow.python.framework.errors_impl.AbortedError: Session 2f3573599f279039 is not found.