An error occurred while downloading the android source code and running repo sync.

$ Repo sync
Exception in thread-2:
Traceback (most recent call last ):
File "/usr/lib/python2.7/threading. py", line 552, in _ bootstrap_inner
Self. Run ()
File "/usr/lib/python2.7/threading. py", line 505, in run
Self. _ target (* Self. _ ARGs, ** self. _ kwargs)
File "/home/zhaozhichao/android2.3.7/. repo/subcmds/Sync. py", line 200, in _ fetchhelper
Clone_bundle = not opt. no_clone_bundle)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 978, in sync_networkhalf
And self. _ applyclonebundle (initial = is_new, quiet = quiet ):
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1519, in _ applyclonebundle
Exist_dst = self. _ fetchbundle (bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1581, in _ fetchbundle
Raise downloaderror ('HTTP % S % s' % (E. Code, MSG ))
Downloaderror: HTTP 504 (gateway timeout: The Gateway server did not receive a timely response)

Exception in thread-1:
Traceback (most recent call last ):
File "/usr/lib/python2.7/threading. py", line 552, in _ bootstrap_inner
Self. Run ()
File "/usr/lib/python2.7/threading. py", line 505, in run
Self. _ target (* Self. _ ARGs, ** self. _ kwargs)
File "/home/zhaozhichao/android2.3.7/. repo/subcmds/Sync. py", line 200, in _ fetchhelper
Clone_bundle = not opt. no_clone_bundle)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 978, in sync_networkhalf
And self. _ applyclonebundle (initial = is_new, quiet = quiet ):
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1519, in _ applyclonebundle
Exist_dst = self. _ fetchbundle (bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1581, in _ fetchbundle
Raise downloaderror ('HTTP % S % s' % (E. Code, MSG ))
Downloaderror: HTTP 504 (gateway timeout: The Gateway server did not receive a timely response)

Exception in thread-4:
Traceback (most recent call last ):
File "/usr/lib/python2.7/threading. py", line 552, in _ bootstrap_inner
Self. Run ()
File "/usr/lib/python2.7/threading. py", line 505, in run
Self. _ target (* Self. _ ARGs, ** self. _ kwargs)
File "/home/zhaozhichao/android2.3.7/. repo/subcmds/Sync. py", line 200, in _ fetchhelper
Clone_bundle = not opt. no_clone_bundle)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 978, in sync_networkhalf
And self. _ applyclonebundle (initial = is_new, quiet = quiet ):
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1519, in _ applyclonebundle
Exist_dst = self. _ fetchbundle (bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1581, in _ fetchbundle
Raise downloaderror ('HTTP % S % s' % (E. Code, MSG ))
Downloaderror: HTTP 504 (gateway timeout: The Gateway server did not receive a timely response)

Exception in thread-3:
Traceback (most recent call last ):
File "/usr/lib/python2.7/threading. py", line 552, in _ bootstrap_inner
Self. Run ()
File "/usr/lib/python2.7/threading. py", line 505, in run
Self. _ target (* Self. _ ARGs, ** self. _ kwargs)
File "/home/zhaozhichao/android2.3.7/. repo/subcmds/Sync. py", line 200, in _ fetchhelper
Clone_bundle = not opt. no_clone_bundle)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 978, in sync_networkhalf
And self. _ applyclonebundle (initial = is_new, quiet = quiet ):
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1519, in _ applyclonebundle
Exist_dst = self. _ fetchbundle (bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1581, in _ fetchbundle
Raise downloaderror ('HTTP % S % s' % (E. Code, MSG ))
Downloaderror: HTTP 504 (gateway timeout: The Gateway server did not receive a timely response)

Exception in thread-5:
Traceback (most recent call last ):
File "/usr/lib/python2.7/threading. py", line 552, in _ bootstrap_inner
Self. Run ()
File "/usr/lib/python2.7/threading. py", line 505, in run
Self. _ target (* Self. _ ARGs, ** self. _ kwargs)
File "/home/zhaozhichao/android2.3.7/. repo/subcmds/Sync. py", line 200, in _ fetchhelper
Clone_bundle = not opt. no_clone_bundle)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 978, in sync_networkhalf
And self. _ applyclonebundle (initial = is_new, quiet = quiet ):
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1519, in _ applyclonebundle
Exist_dst = self. _ fetchbundle (bundle_url, bundle_tmp, bundle_dst, quiet)
File "/home/zhaozhichao/android2.3.7/. repo/Project. py", line 1581, in _ fetchbundle
Raise downloaderror ('HTTP % S % s' % (E. Code, MSG ))
Downloaderror: HTTP 504 (gateway timeout: The Gateway server did not receive a timely response)

Error: Exited sync due to fetch errors