[Q] Build Error (stuck) topic

generating changelog...
Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
self.run()
File "/usr/lib/python2.7/threading.py", line 763, in run
self.__target(*self.__args, **self.__kwargs)
File "/usr/lib/python2.7/multiprocessing/pool.py", line 338, in _handle_tasks
for i, task in enumerate(taskseq):
File "/usr/lib/python2.7/multiprocessing/pool.py", line 260, in <genexpr>
self._taskqueue.put((((result._job, i, func, (x,), {})
File "/home/novaswift/giveup/.repo/repo/subcmds/forall.py", line 216, in <genexpr>
for cnt, p in enumerate(projects))
File "/home/novaswift/giveup/.repo/repo/subcmds/forall.py", line 157, in _SerializeProject
'lrev': project.GetRevisionId(),
File "/home/novaswift/giveup/.repo/repo/project.py", line 1190, in GetRevisionId
self.name))

I'm trying to build but the build is stuck here for a long time.I tried Googling it but no luck. Anybody know how to fix it.