ha_proxy: neutron request with long url results in BADREQUEST error

Following request to neutron resulted in BADREQUEST error:

curl -i "http://10.204.216.23:9696/v2.0/ports.json?device_id=f848d485-2afe-49a4-9bb2-215fd867b6a2&device_id=2c380c43-74ba-4950-b387-d47f70428c56&device_id=1b5ea912-6f0c-4de8-bd4a-4819250f0f62&device_id=98b2d529-7258-4c34-a73a-d4424b86e7c6&device_id=128bac23-04e9-4445-ad63-b61cf5fedde5&device_id=7d3ae6e6-6b23-4af0-9805-1b6ce42ba426&device_id=7b900045-8a36-488b-a5a9-e2e0c980d8b0&device_id=a2a1f281-d43a-4027-8e68-dd41aadf98e1&device_id=13c410a1-81c0-4dfd-9396-40638370af5c&device_id=eb83e1ef-cc70-47b8-89dd-0b0a508dad8d&device_id=e7ab315a-2159-4808-9b22-3fbfc25e1795&device_id=f471c7f2-9ed2-4c7d-bedf-70f646bab12f&device_id=f3b9a36a-d52d-47be-b967-23bae852b1c9&device_id=24db78bb-6ff4-4ed8-bbd7-f81c59d9944e&device_id=6323b09e-a469-4b26-b3ea-d4ce7bbe52cf&device_id=2d12a0fa-d153-44a5-8c7c-d3f889f154e9&device_id=aee2eaa9-cb80-43b5-a0fa-0243904c7c0a&device_id=5321703d-21cc-4ef4-98bd-7817be28ce8c&device_id=beb2c906-6500-4aa3-aa6f-1e9843881fb2&device_id=af73f94f-3731-420c-a09c-92f8c469700a&device_id=efe8a992-6d18-42fb-bc8a-75e3e4a43821&device_id=08a1686f-00b5-4283-a797-f356b7cc2714&device_id=6dee3f46-4312-4873-ba76-a78e336faa3d&device_id=6e435e7b-13c4-4a17-bf4e-c722c43b28fe&device_id=d20999c6-7329-49c4-90f8-0eb5c968b32a&device_id=53d44638-83d9-4b10-82e5-b53df612aef8&device_id=79ab4f60-4c4c-48b3-b51e-40b72c6f80c6&device_id=f0407d85-9f50-4435-8847-4fe8da897303&device_id=e89d7f36-dc9a-4284-87fa-3268e1ab98f4&device_id=2d09b29d-1714-4be7-bfb8-6b6d17b753c2&device_id=f8ab1b16-fed1-44fa-a821-96d82762d533&device_id=3f057359-69cf-4918-bed2-8b6036e2a3ab&device_id=4e97eeca-c53f-4724-ad93-d77a8b2783d5&device_id=c67d28b0-3932-49c9-826e-bc97cc3a2e5e&device_id=a7ab6833-14a1-4d79-b382-495b140aea1b&device_id=f9b31a14-6bd1-4197-ad3c-4451b4f4bd8d&device_id=ba4069e0-fdaf-4db9-98f5-d8e2f7705b83&device_id=2d53e3cf-ba42-4df6-8a83-28c039527105&device_id=2a69ed83-6fd0-4209-9530-68a9f3f50e95&device_id=71f73371-dcbb-41fb-b04b-2849754d9777&device_id=e8b01116-845b-4bc3-b7e3-25126f41aa09&device_id=e3181a4c-5483-4f4a-a3cf-e78340fbe167&device_id=74da7f36-19d7-4f60-aff2-67dfc1373f74&device_id=ddf08281-7cb6-400c-94b2-375f6708583b&device_id=58f1bb92-4b7d-4b6e-b164-7f2336a342af&device_id=f94e4482-1c3d-45d4-aa64-72b23e22669b&device_id=4b18ef67-b263-4157-8294-cff46128bdd1&device_id=fe717dda-46c0-4784-9f25-883dbc305cb2&device_id=0e57125c-c0ac-468b-903f-6aeb74d8da36&device_id=905ba69a-c40e-4f92-aa8b-dadea91906e2&device_id=469fa94a-2d30-4d40-9895-820f982580a4&device_id=64b86893-e21c-4e31-9d3f-f030d6f23328&device_id=4376deb2-d3b1-4d90-bb0c-4d0a086c8497&device_id=e5c792a7-c476-46fd-8b1e-bf768359c185&device_id=d7f6283c-3dfb-49e6-887d-56b1bc6fbfd6&device_id=3240a521-c973-4e51-9587-da4e70acb366&device_id=ae8b75bb-b0e4-4aed-9958-5516b8a91110&device_id=f6fdeb2a-102a-4b11-9c3e-de7f7958bbf3&device_id=6cd5d27d-e564-4eb9-948e-d82fde0020be&device_id=90d5821c-b609-4156-939d-0683d0b1a842&device_id=a16e04b7-eaac-4fef-9703-addb5eb0970b&device_id=82320e28-d244-4ca2-9d6a-fc78d3cf8ff7&device_id=4cf91274-a8f2-4ed1-9afa-f4ebdf14165a&device_id=d55eac9e-6be4-4977-9e3a-43a679d54c0b&device_id=6720574d-8d93-46ce-b4ac-9e0f21e654b6&device_id=a3be0053-fb26-4555-8c50-23919d1bad42&device_id=8254939a-0d31-4d84-b5fe-6a726f1f22fd&device_id=91db8be0-91bf-413c-acf9-0bb7c959e8a9&device_id=3535fbd3-6115-48fa-9d79-b396bef5180c&device_id=3e8dc4ad-9dd3-4290-a763-db7ab12aa252&device_id=d066432c-cda3-49fc-bb19-94c22af18816&device_id=aae607ae-e927-428e-9b45-e024f3973270&device_id=ef9623d5-510f-4da5-859c-9ce9ecea2169&device_id=e005d62a-73c6-419a-8efd-d34f6ace7007&device_id=fffe05ba-0f5b-4d8d-b3d2-e39f36317d9e&device_id=2e0f6182-b63e-4f06-87c0-c93944ba1840&device_id=ed9ce464-25a1-4979-84d8-913074199916&device_id=893d21b6-9e37-4909-bae5-c4c681c10211" -X GET -H "X-Auth-Token: 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-GAKls1U0e60huI5uNMpioumrT0yHmm3IXChf2mjEKLXZcztkKYtvG0MRbGdvwImu7dC8x4wGxyts1FXSMlQADUp2YpRRAhbVDjR3VNolqLQP2-ybdFSfHfd9mG0xGWy7EjLbpKhMquZXdDJLddHP9X9b-UF3RzEwp1MTaO8gLura4eXcZc-pTU3dSs+oXrG1cCkBSCelRjhdLQN9jxDJ2Jo4QSeaA28yFb6Fr0PPeWmcElI3TPCOBD-ddjbyJwiQGPsPahZmWtJWJ0OgPw2ui320arvDn2WSxEjNec1mJEMjsS2xO0-TiJRxUGiwwNs+bZOkr7h5iVjo3ks=" -H "Content-Type: application/json" -H "Accept: application/json" -H "User-Agent: python-neutronclient"

HTTP/1.0 400 Bad request
Cache-Control: no-cache
Connection: close
Content-Type: text/html

<html><body><h1>400 Bad request</h1>
Your browser sent an invalid request.
</body></html>

HAProxy logs:

Jan 30 09:35:39 nodea27 haproxy[32206]: 10.204.216.23:54096 [30/Jan/2015:09:35:39.057] quantum-server quantum-server/<NOSRV> -1/-1/-1/-1/0 400 188 - - PR-- 0/0/0/0/0 0/0 "<BADREQ>"

Tuning the config parameters of haproxy does resolve it: (Either of the following config param will resolve the issue)

1. to set buffer size:
    tune.bufsize 128000
2. to set max rewrite size
    tune.maxrewrite 1024