py3 TypeError WSGI responses must be bytes

[Bhaskar Singhal]

Hello All,

Before any object is marked for expiring, the object-expirer keeps failing with the following error

Jan 31 13:00:15.464162 hostname swift [7863]: ERROR with Account server 150.50.3.109:8501/volume-00011d49 re: Trying to HEAD /v1/.expiring_objects: ConnectionTimeout (0.5s) (txn: txffb2b8b13a2f4cc1a27ad-006016a9d8)
Jan 31 13:00:19.411485 hostname swift [7863]: ERROR Unhandled exception in request: #012Traceback (most recent call last):#012 File "/usr/lib/python3/dist-packages/swift/proxy/server.py", line 680, in handle_request#012 resp = handler(req)#012 File "/usr/lib/python3/dist-packages/swift/proxy/controllers/base.py", line 2122, in HEAD#012 return self.GETorHEAD(req)#012 File "/usr/lib/python3/dist-packages/swift/proxy/controllers/account.py", line 74, in GETorHEAD#012 req.swift_entity_path.rstrip('/'), concurrency)#012 File "/usr/lib/python3/dist-packages/swift/proxy/controllers/base.py", line 2186, in GETorHEAD_base#012 headers=handler.source_headers)#012 File "/usr/lib/python3/dist-packages/swift/proxy/controllers/base.py", line 2053, in best_response#012 quorum_size=quorum_size)#012 File "/usr/lib/python3/dist-packages/swift/proxy/controllers/base.py", line 2096, in _compute_quorum_response#012 resp.body = bodies[status_index]#012 File "/usr/lib/python3/dist-packages/swift/common/swob.py", line 387, in setter#012 raise TypeError('WSGI responses must be bytes')#012TypeError: WSGI responses must be bytes (txn: txffb2b8b13a2f4cc1a27ad-006016a9d8)
Jan 31 13:00:19.469340 hostname object-expirer [7863]: Unhandled exception: #012Traceback (most recent call last):#012 File "/usr/lib/python3/dist-packages/swift/obj/expirer.py", line 323, in run_once#012 self.swift.get_account_info(task_account)#012 File "/usr/lib/python3/dist-packages/swift/common/internal_client.py", line 435, in get_account_info#012 resp = self.make_request('HEAD', path, {}, acceptable_statuses)#012 File "/usr/lib/python3/dist-packages/swift/common/internal_client.py", line 229, in make_request#012 raise UnexpectedResponse(msg, resp)#012swift.common.internal_client.UnexpectedResponse: Unexpected response: 500 Internal Error (txn: txffb2b8b13a2f4cc1a27ad-006016a9d8)

A similar issue can also be observed in _make_node_request (https://github.com/openstack/swift/blob/master/swift/proxy/controllers/base.py#L1390) where instead of appending b'' we are appending ''

Regards,
Bhaskar

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/swift/+/811001