# 1.4.1 SPDY error FIXME: chain too big in spdy filter **URL:** \ **Category:** NGINX\ **Created:** [May 29, 2013, 7:04am UTC](https://www.ruby-forum.com/t/1-4-1-spdy-error-fixme-chain-too-big-in-spdy-filter/235062 "2013-05-29T07:04:22Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Post date:** [May 29, 2013, 7:04am UTC](https://www.ruby-forum.com/t/1-4-1-spdy-error-fixme-chain-too-big-in-spdy-filter/235062/1 "2013-05-29T07:04:22Z")
Hi, Running 1.4.1 and using SPDY and SSL extensively (exclusively, actually). Seeing a ton (thousands) of errors in the error log, similar to: 2013/05/29 00:22:53 [alert] 25981#0: \*8781732 FIXME: chain too big in spdy filter: 25516336 while sending to client, client: x.x.x.x, server: x.y.z, request: “GET /attachments/113914 HTTP/1.1”, upstream: “fastcgi://127.0.0.1:9001”, host: “x.y.z”, referrer: “a.b.c” Names changed to protect the innocent. What is happening, and how to solve? Users are also reporting that larger file downloads are failing with “Network error” or timeout errors, something that never happened prior to using SPDY or SSL. Since I am running an extended validation SSL certificate, I opted to make _all_ urls on my site SSL, so yes that means attachments are coming thru SSL as well. Some help? ---
**Author:** ![mike](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/58f4c7/32.png) [@mike](https://www.ruby-forum.com/u/mike)\ **Post date:** [May 29, 2013, 3:26pm UTC](https://www.ruby-forum.com/t/1-4-1-spdy-error-fixme-chain-too-big-in-spdy-filter/235062/2 "2013-05-29T15:26:55Z")
On Wednesday 29 May 2013 09:03:41 Mike wrote: […] > 2013/05/29 00:22:53 [alert] 25981#0: \*8781732 FIXME: chain too big in spdy > filter: 25516336 while sending to client, client: x.x.x.x, server: x.y.z, > request: “GET /attachments/113914 HTTP/1.1”, upstream: > “fastcgi://127.0.0.1:9001”, host: “x.y.z”, referrer: “a.b.c” […] > Some help? You have configured too big buffers, that currently cannot be handled in spdy module. So, you should either decrease the amount of buffers involved in request processing, or disable spdy. It’s hard to tell what buffers you have to tune without knowing of your configuration, but from the error message I assume that “fastcgi\_buffers”. With the default configuration it works well. wbr, Valentin V. Bartenev – > **[nginx: donation](http://nginx.org/en/donation.html)** ---
**Author:** ![mike](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/58f4c7/32.png) [@mike](https://www.ruby-forum.com/u/mike)\ **Post date:** [May 30, 2013, 3:33am UTC](https://www.ruby-forum.com/t/1-4-1-spdy-error-fixme-chain-too-big-in-spdy-filter/235062/3 "2013-05-30T03:33:26Z")
What is the maximum amount of the buffer? I could not locate any documentation on any of this with regards to how it would cause an error on SPDY. And doesn’t “FIXME” indicate this is a bug? Why would it be in the code otherwise? I already removed SPDY and the errors went away, as did the problems users were experiencing downloading larger files. But I would like to add it back. Posted at Nginx Forum: > **[Re: 1.4.1 SPDY error FIXME: chain too big in spdy filter](https://forum.nginx.org/read.php?2,239647,239671#msg-239671)** > > Hi, Running 1.4.1 and using SPDY and SSL extensively (exclusively, actually). Seeing a ton (thousands) of errors in the error log, similar to: 2013/05/29 00:22:53 \[alert\] 25981#0: \*8781732 FIXME: chain ---
**Author:** ![mike](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/58f4c7/32.png) [@mike](https://www.ruby-forum.com/u/mike)\ **Post date:** [May 30, 2013, 5:16pm UTC](https://www.ruby-forum.com/t/1-4-1-spdy-error-fixme-chain-too-big-in-spdy-filter/235062/4 "2013-05-30T17:16:45Z")
On Thursday 30 May 2013 05:32:51 ctrlbrk wrote: > What is the maximum amount of the buffer? Currently the total amount of operational buffers cannot exceed 2^24 - 1 bytes (in other words must be less than 16 MiB). > I could not locate any documentation on any of this with regards to how it > would cause an error on SPDY. There is more then one way to trigger this error. The documentation just states that the module is experimental. When you are using an experimental module that implements experimental protocol draft then you have to be ready for any kind of errors, and not only caused by the module itself, but in browsers too. Though you are probably right, and this drawback should be documented somehow explicitly. > And doesn’t “FIXME” indicate this is a bug? Why would it be in the code > otherwise? That part of code lacks chain/buffer splitting mechanism as well as the DATA frame adjusting feature. It will be implemented, but we have no ETA for this yet. wbr, Valentin V. Bartenev – > **[nginx: donation](http://nginx.org/en/donation.html)** ---
**Author:** ![mike](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/58f4c7/32.png) [@mike](https://www.ruby-forum.com/u/mike)\ **Post date:** [July 5, 2013, 3:28am UTC](https://www.ruby-forum.com/t/1-4-1-spdy-error-fixme-chain-too-big-in-spdy-filter/235062/5 "2013-07-05T03:28:56Z")
Anyone? Posted at Nginx Forum: > **[Re: 1.4.1 SPDY error FIXME: chain too big in spdy filter](https://forum.nginx.org/read.php?2,239647,240591#msg-240591)** > > Hi, Running 1.4.1 and using SPDY and SSL extensively (exclusively, actually). Seeing a ton (thousands) of errors in the error log, similar to: 2013/05/29 00:22:53 \[alert\] 25981#0: \*8781732 FIXME: chain ---
**Author:** ![mike](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/58f4c7/32.png) [@mike](https://www.ruby-forum.com/u/mike)\ **Post date:** [July 5, 2013, 4:07pm UTC](https://www.ruby-forum.com/t/1-4-1-spdy-error-fixme-chain-too-big-in-spdy-filter/235062/6 "2013-07-05T16:07:43Z")
On Sunday 30 June 2013 04:03:08 ctrlbrk wrote: > Bump for suggestions please 2048k (fastcgi\_buffer\_size) + 16 \* 2048k (fastcgi\_buffers) = 34 Mb \> 16 wbr, Valentin V. Bartenev ---
**Author:** ![mike](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/58f4c7/32.png) [@mike](https://www.ruby-forum.com/u/mike)\ **Post date:** [June 30, 2013, 7:07pm UTC](https://www.ruby-forum.com/t/1-4-1-spdy-error-fixme-chain-too-big-in-spdy-filter/235062/7 "2013-06-30T19:07:46Z")
## ctrlbrk Wrote: > BTW, I use > > fastcgi\_buffers 16 2048k; > fastcgi\_buffer\_size 2048k; > fastcgi\_busy\_buffers\_size 2048k; > > So I am under the 16MB, unless you are applying it \*16? Bump for suggestions please Posted at Nginx Forum: [http://forum.nginx.org/read.php?2,239647,240426#msg-240426](http://forum.nginx.org/read.php?2,239647,240426#msg-240426)