backup/restore exits with errno 32 broken pipe python stack trace

Saw this in some email stack...

>>> Exception in thread s0:
>>> Traceback (most recent call last):
>>> File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
>>> self.run()
>>> File "/usr/lib/python2.6/threading.py", line 484, in run
>>> self._target(*self.args, **self._kwargs)
>>> File "/home/ubuntu/membase-cli/pump_mc.py", line 77, in run
>>> rv, batch, need_backoff = self.scatter_gather(mconns, batch)
>>> File "/home/ubuntu/membase-cli/pump_mc.py", line 111, in scatter_gather
>>> rv = self.send_msgs(conn, batch.msgs, self.operation())
>>> File "/home/ubuntu/membase-cli/pump_mc.py", line 153, in send_msgs
>>> conn.s.send(''.join(m))
>>> error: [Errno 32] Broken pipe

>>>>>>>>> LD_LIBRARY_PATH environment variables
>>>>>>>>> Exception in thread s0:
>>>>>>>>> Traceback (most recent call last):
>>>>>>>>> File "/usr/lib/python2.6/threading.py", line 532, in
>>>>>>>>> __bootstrap_inner
>>>>>>>>> self.run()
>>>>>>>>> File "/usr/lib/python2.6/threading.py", line 484, in run
>>>>>>>>> self._target(*self.args, **self._kwargs)
>>>>>>>>> File "/home/ubuntu/membase-cli/pump_mc.py", line 77, in run
>>>>>>>>> rv, batch, need_backoff = self.scatter_gather(mconns, batch)
>>>>>>>>> File "/home/ubuntu/membase-cli/pump_mc.py", line 111, in
>>>>>>>>> scatter_gather
>>>>>>>>> rv = self.send_msgs(conn, batch.msgs, self.operation())
>>>>>>>>> File "/home/ubuntu/membase-cli/pump_mc.py", line 153, in
>>>>>>>>>send_msgs
>>>>>>>>> conn.s.send(''.join(m))
>>>>>>>>> error: [Errno 32] Broken pipe