Comment 0 for bug 1825387

Hello,

I'm using Swift Rocky and i changed the value of max_meta_value_length in swift.conf :
# /etc/swift/swift.conf
[swift-constraints]
max_meta_value_length = 2048

This request is OK :
# Valid request with metadata (256 octets)
curl -i http://controller:8080/v1/AUTH_21f2a561d80345318e5092a87a0675f8/container1/helloworld.txt -X PUT -d "Hello" -H "Content-Type: text/html; charset=UTF-8" -H "X-Auth-Token: gAAAAABcuJCWipnlVuX_FftkPS0SGeqOLIdnKEiuSa1yNVV2yUe5q3ASb7lv4EqmUeq0x_Eu0BhNtWHh7e5p_Nx8qqp6fPW8BlT-_7gNsTb9K4iDQj7I7Hhf89GoD46QUPHGPVCAJgywykaCtA2dsiR7eSj6Ac2CHpGWDE9TACdQ462iL7jNEz0" -H "X-Object-Meta-Label: zerzerzerzrzerzrzrzrzrzerzrfgrgtrmlbkrtmbonrmotbnrmotbnrtrontgzerzerzerzrzerzrzaaaaaaaaaaaaaaaaaaaaazerzerzerzrzerzrzrzrzrzerzrfgrgtrmlbkrtmbonrmotbnrmotbnrtrontgzerzerzerzrzerzrzaaaaaaaaaaaaaaaaaaaaamotbnrmotbnrtrontgzerzerzerzrzerzrzaaaaaaaaaaaaaaaaaaaaa"

But with 1 added octet this failed :
# Invalid request with metadata (257 octets)
curl -i http://controller:8080/v1/AUTH_21f2a561d80345318e5092a87a0675f8/container1/helloworld.txt -X PUT -d "Hello" -H "Content-Type: text/html; charset=UTF-8" -H "X-Auth-Token: gAAAAABcuJCWipnlVuX_FftkPS0SGeqOLIdnKEiuSa1yNVV2yUe5q3ASb7lv4EqmUeq0x_Eu0BhNtWHh7e5p_Nx8qqp6fPW8BlT-_7gNsTb9K4iDQj7I7Hhf89GoD46QUPHGPVCAJgywykaCtA2dsiR7eSj6Ac2CHpGWDE9TACdQ462iL7jNEz0" -H "X-Object-Meta-Label: zerzerzerzrzerzrzrzrzrzerzrfgrgtrmlbkrtmbonrmotbnrmotbnrtrontgzerzerzerzrzerzrzaaaaaaaaaaaaaaaaaaaaazerzerzerzrzerzrzrzrzrzerzrfgrgtrmlbkrtmbonrmotbnrmotbnrtrontgzerzerzerzrzerzrzaaaaaaaaaaaaaaaaaaaaamotbnrmotbnrtrontgzerzerzerzrzerzrzaaaaaaaaaaaaaaaaaaaaaa"

With the log :
Apr 18 17:00:13 controller proxy-server: ERREUR Exception non gérée dans la demande:
#012Traceback (most recent call last):
#012 File "/usr/lib/python2.7/site-packages/swift/proxy/server.py", line 527, in handle_request
#012 return handler(req)
#012 File "/usr/lib/python2.7/site-packages/swift/proxy/controllers/base.py", line 288, in wrapped
#012 return func(*a, **kw)
#012 File "/usr/lib/python2.7/site-packages/swift/proxy/controllers/obj.py", line 828, in PUT
#012 req, data_source, nodes, partition, outgoing_headers)
#012 File "/usr/lib/python2.7/site-packages/swift/proxy/controllers/obj.py", line 1021, in _store_object
#012 self._get_put_responses(req, putters, len(nodes))
#012 File "/usr/lib/python2.7/site-packages/swift/proxy/controllers/obj.py", line 483, in _get_put_responses
#012 _handle_response(putter, response)
#012 File "/usr/lib/python2.7/site-packages/swift/proxy/controllers/obj.py", line 479, in _handle_response
#012 etags.add(response.getheader('etag').strip('"'))
#012AttributeError: 'NoneType' object has no attribute 'strip' (txn: tx650ca90e454b445eb7075-005cb890fd) (client_ip: <ip_proxy_swift>)
Apr 18 17:00:13 controller proxy-server: <ip_proxy_swift> <ip_proxy_swift> 18/Apr/2019/15/00/13 PUT /v1/AUTH_21f2a561d80345318e5092a87a0675f8/container1/helloworld.txt HTTP/1.0 500 - curl/7.29.0 gAAAAABcuJCWipnl... 5 125 - tx650ca90e454b445eb7075-005cb890fd - 0.0386 - - 1555599613.684866905 1555599613.723479033 0