On Tuesday 26 January 2016 15:14:04 Shengtuo Hu wrote: > Hi, > > I was using "nghttp" command line tool to test NGINX. I enabled > "continuation" option in "nghttp" command line tool, which filled the > HEADERS frame with a very large header field/value. Then I got an GOAWAY > frame with error code of "ENHANCE_YOUR_CALM(0x0b)". Then I checked the > debug log file of the server, and found "client exceeded > http2_max_header_size limit while processing HTTP/2 connection". > > May I know the consideration about this limitation? For a client, it may > not be able to know the precise value of "http2_max_header_size".
Decompression and processing of headers require proportional amount of memory. The consideration is simple: to limit the amount of memory that can be eaten by a client and prevent DoS attack on the server. > Once a client gets this error, how can it recover from it or request > the resource successfully? > [..] If a client gets this error then either it is doing something wrong by sending incorrect requests, or the server is configured incorrectly. wbr, Valentin V. Bartenev _______________________________________________ nginx mailing list nginx@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx
