Error creating new VMs when using a large image

Issue

• We observe when trying to create an instance of a large image the process ends with error, but when we try with an image smaller than 1 Gb the creation occurs successfully.

• We also can't download the created image as it ends with those errors:

      (overcloud) [stack@undercloud ~]$ time openstack image save 248775bf-6d7f-464a-a460-aba3354b1429 --file 
      img-new-redownload.qcow2
     ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))

real    0m23.283s
user    0m4.246s
sys     0m3.327s

• We can see the same chunkedencoding error in the cinder-volume logs:

2022-05-09 15:00:44.086 87 ERROR cinder.image.image_utils [req-fa843c92-54df-4618-a4f6-47927110ef7f ebcf720c6f3f46a39ee355639b512a39 28135a46c06e496b9fa42a927b8bf49c - default default] IOError: None None: requests.exceptions.ChunkedEncodingError: ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))
2022-05-09 15:00:44.455 87 WARNING cinder.volume.manager [req-fa843c92-54df-4618-a4f6-47927110ef7f ebcf720c6f3f46a39ee355639b512a39 28135a46c06e496b9fa42a927b8bf49c - default default] Task 'cinder.volume.flows.manager.create_volume.CreateVolumeFromSpecTask;volume:create' (e8a7c141-09d5-4612-91da-b9c981432efb) transitioned into state 'FAILURE' from state 'RUNNING'
...
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server [req-fa843c92-54df-4618-a4f6-47927110ef7f ebcf720c6f3f46a39ee355639b512a39 28135a46c06e496b9fa42a927b8bf49c - default default] Exception during message handling: cinder.exception.ImageDownloadFailed: Failed to download image 05a52859-2da1-4753-93e9-43fa8d855a08, reason: IOError: None None
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/urllib3/response.py", line 601, in _update_chunk_length
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server     self.chunk_left = int(line, 16)
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server ValueError: invalid literal for int() with base 16: b''
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server During handling of the above exception, another exception occurred:
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/urllib3/response.py", line 360, in _error_catcher
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server     yield
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/urllib3/response.py", line 666, in read_chunked
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server     self._update_chunk_length()
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3.6/site-packages/urllib3/response.py", line 605, in _update_chunk_length
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server     raise httplib.IncompleteRead(line)
2022-05-09 15:00:44.755 87 ERROR oslo_messaging.rpc.server http.client.IncompleteRead: IncompleteRead(0 bytes read)