Request using Chunked encoding as a header in object GET raises httlib Error

8 2015-08-12T12:32:30.792721+05:30 alok-HP-Compaq-8200-Elite-MT-PC proxy-server: STDERR: self.handle_one_response() (txn: tx3c9937c0b4b0490bad5ed -0055caef86) (client_ip: 127.0.0.1)
909189 2015-08-12T12:32:30.792786+05:30 alok-HP-Compaq-8200-Elite-MT-PC proxy-server: STDERR: File "/usr/local/lib/python2.7/dist-packages/eventlet/ws gi.py", line 507, in handle_one_response (txn: tx3c9937c0b4b0490bad5ed-0055caef86) (client_ip: 127.0.0.1)
909190 2015-08-12T12:32:30.792857+05:30 alok-HP-Compaq-8200-Elite-MT-PC proxy-server: STDERR: while self.environ['eventlet.input'].read(MINIMUM_CHUNK_ SIZE): (txn: tx3c9937c0b4b0490bad5ed-0055caef86) (client_ip: 127.0.0.1)
909191 2015-08-12T12:32:30.792922+05:30 alok-HP-Compaq-8200-Elite-MT-PC proxy-server: STDERR: File "/usr/local/lib/python2.7/dist-packages/eventlet/ws gi.py", line 189, in read (txn: tx3c9937c0b4b0490bad5ed-0055caef86) (client_ip: 127.0.0.1)
909192 2015-08-12T12:32:30.793002+05:30 alok-HP-Compaq-8200-Elite-MT-PC proxy-server: STDERR: return self._chunked_read(self.rfile, length) (txn: tx3c 9937c0b4b0490bad5ed-0055caef86) (client_ip: 127.0.0.1)
909193 2015-08-12T12:32:30.793170+05:30 alok-HP-Compaq-8200-Elite-MT-PC proxy-server: STDERR: File "/usr/local/lib/python2.7/dist-packages/eventlet/ws gi.py", line 179, in _chunked_read (txn: tx3c9937c0b4b0490bad5ed-0055caef86) (client_ip: 127.0.0.1)
909194 2015-08-12T12:32:30.793204+05:30 alok-HP-Compaq-8200-Elite-MT-PC object-server: STDERR: File "/usr/local/lib/python2.7/dist-packages/eventlet/w sgi.py", line 189, in read (txn: tx3c9937c0b4b0490bad5ed-0055caef86)
909195 2015-08-12T12:32:30.793285+05:30 alok-HP-Compaq-8200-Elite-MT-PC proxy-server: STDERR: self.chunk_length = int(rfile.readline().split(b";", 1)[ 0], 16) (txn: tx3c9937c0b4b0490bad5ed-0055caef86) (client_ip: 127.0.0.1)
909196 2015-08-12T12:32:30.793351+05:30 alok-HP-Compaq-8200-Elite-MT-PC object-server: STDERR: return self._chunked_read(self.rfile, length) (txn: tx3 c9937c0b4b0490bad5ed-0055caef86)
909197 2015-08-12T12:32:30.793373+05:30 alok-HP-Compaq-8200-Elite-MT-PC proxy-server: STDERR: ValueError: invalid literal for int() with base 16: '' ( txn: tx3c9937c0b4b0490bad5ed-0055caef86) (client_ip: 127.0.0.1)
909198 2015-08-12T12:32:30.793419+05:30 alok-HP-Compaq-8200-Elite-MT-PC object-server: STDERR: File "/usr/local/lib/python2.7/dist-packages/eventlet/w sgi.py", line 179, in _chunked_read (txn: tx3c9937c0b4b0490bad5ed-0055caef86)
909199 2015-08-12T12:32:30.793492+05:30 alok-HP-Compaq-8200-Elite-MT-PC object-server: STDERR: self.chunk_length = int(rfile.readline().split(b";", 1) [0], 16) (txn: tx3c9937c0b4b0490bad5ed-0055caef86)
909200 2015-08-12T12:32:30.793563+05:30 alok-HP-Compaq-8200-Elite-MT-PC object-server: STDERR: ValueError: invalid literal for int() with base 16: '' (txn: tx3c9937c0b4b0490bad5ed-0055caef86)

Yes, I can reproduce this, and yes, I get a pair of stack traces in my logs when I do. Also of note: the client receives the normal GET response; they can't tell that anything broke.

However, those stack traces don't contain any references to Swift code. Everything is in eventlet.wsgi or Python stdlib; there's not a single frame that refers to Swift code, so it seems highly unlikely that Swift can do anything about it.

The only improvement I can see right now is that Swift shouldn't pass Transfer-Encoding to the object server on object GET since it's not going to send a body on the GET request. That'd take it from two stack traces to one.

Also, if I actually *send* a GET body, then the proxy doesn't log any stack trace. Only the object server does.

Similar issue:
https://bugs.launchpad.net/glance/+bug/1523209

It's reason was Chunk requests handling. I will upload a patch soon for it's handling.