看了下，和上一个issues的log是一样的，应该是mq没有保护好的问题把

[tottilin]

Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/threading.py", line 551, in *bootstrap_inner
self.run()
File "/usr/local/lib/python2.7/threading.py", line 504, in run
self.__target(_self.__args, _self.__kwargs)
File "/usr/crawl/code/cola-code/cola/core/mq/__init.py", line 103, in _init_process
self.put(objs, flush=flush)
File "/usr/crawl/code/cola-code/cola/core/mq/node.py", line 407, in put
self._remote_or_local_batch_put(addr, self.caches[addr])
File "/usr/crawl/code/cola-code/cola/core/mq/node.py", line 348, in _remote_or_local_batch_put
self.mq_node.batch_put(objs)
File "/usr/crawl/code/cola-code/cola/core/mq/node.py", line 151, in batch_put
self.put(obs, force=force, priority=priority)
File "/usr/crawl/code/cola-code/cola/core/mq/node.py", line 125, in put
priority_store.put(objs, force=force)
File "/usr/crawl/code/cola-code/cola/core/mq/store.py", line 291, in put
result = self.put_one(obj, force, commit=False)
File "/usr/crawl/code/cola-code/cola/core/mq/store.py", line 266, in put_one
pos = self._seek_writable_pos(m)
File "/usr/crawl/code/cola-code/cola/core/mq/store.py", line 228, in _seek_writable_pos
size, = struct.unpack('I', map_handle[pos:pos+4])
TypeError: 'NoneType' object has no attribute 'getitem'