When building a TripleO devtest stack with USE_IRONIC=1 I often (but not always) see the undercloud fail to deploy a machine with the following error in ironic-conductor.log:
Traceback (most recent call last):
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 346, in fire_timers
timer()
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/eventlet/hubs/timer.py", line 56, in __call__
cb(*args, **kw)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/eventlet/greenthread.py", line 194, in main
result = function(*args, **kwargs)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/conductor/manager.py", line 369, in _do_node_deploy
node.target_provision_state = states.NOSTATE
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/openstack/common/excutils.py", line 70, in __exit__
six.reraise(self.type_, self.value, self.tb)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/conductor/manager.py", line 363, in _do_node_deploy
task.driver.deploy.prepare(task, node)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/drivers/modules/pxe.py", line 610, in prepare
_cache_images(node, pxe_info, task.context)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/drivers/modules/pxe.py", line 431, in _cache_images
_cache_tftp_images(ctx, node, pxe_info)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/drivers/modules/pxe.py", line 357, in _cache_tftp_images
_get_image(ctx, path, uuid, CONF.pxe.tftp_master_path, None)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/drivers/modules/pxe.py", line 337, in _get_image
images.fetch_to_raw(ctx, uuid, tmp_path, image_service)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/common/images.py", line 193, in fetch_to_raw
image_to_raw(image_href, path, path_tmp)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/common/images.py", line 198, in image_to_raw
data = qemu_img_info(path_tmp)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/common/images.py", line 167, in qemu_img_info
'qemu-img', 'info', path)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/common/utils.py", line 64, in execute
result = processutils.execute(*cmd, **kwargs)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/ironic/openstack/common/processutils.py", line 163, in execute
result = obj.communicate()
File "/usr/lib/python2.7/subprocess.py", line 799, in communicate
return self._communicate(input)
File "/usr/lib/python2.7/subprocess.py", line 1403, in _communicate
stdout, stderr = self._communicate_with_select(input)
File "/usr/lib/python2.7/subprocess.py", line 1504, in _communicate_with_select
rlist, wlist, xlist = select.select(read_set, write_set, [])
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/eventlet/green/select.py", line 75, in select
listeners.append(hub.add(hub.READ, k, on_read))
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/eventlet/hubs/epolls.py", line 48, in add
listener = BaseHub.add(self, evtype, fileno, cb)
File "/opt/stack/venvs/ironic/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 126, in add
evtype, fileno, evtype))
RuntimeError: Second simultaneous read on fileno 9 detected. Unless you really know what you're doing, make sure that only one greenthread can read any particular socket. Consider using a pools.Pool. If you do know what you're doing and want to disable this error, call eventlet.debug.hub_prevent_multiple_readers(False)
Hi! I believe that this error should be fixed by patch https:/
If it's not the case, please feel free to reopen this bug with providing an up-to-date traceback.