Websockets proxy "Broken pipe"

I have a problem with nginx and websockets proxy.

Here is the message I receive:

[error] 20999#0: *1997296 send() failed (32: Broken pipe) while proxying
upgraded connection, client: 10.0.25.47, server: example.com, request:
“GET
/xmpp/ HTTP/1.1”, upstream: “http://192.168.122.8:5280/xmpp/”, host:
example.com

Here is my config:

    location /xmpp {
            proxy_pass http://192.168.122.8:5280;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
    }

When ejabberd has big history log, nginx returns error message.

nginx -V
nginx version: nginx/1.4.6 (Ubuntu)
built by gcc 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
TLS SNI support enabled
configure arguments: --with-cc-opt=’-g -O2 -fstack-protector
–param=ssp-buffer-size=4 -Wformat -Werror=format-security
-D_FORTIFY_SOURCE=2’ --with-ld-opt=’-Wl,-Bsymbolic-functions
-Wl,-z,relro’
–prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf
–http-log-path=/var/log/nginx/access.log
–error-log-path=/var/log/nginx/error.log
–lock-path=/var/lock/nginx.lock
–pid-path=/run/nginx.pid
–http-client-body-temp-path=/var/lib/nginx/body
–http-fastcgi-temp-path=/var/lib/nginx/fastcgi
–http-proxy-temp-path=/var/lib/nginx/proxy
–http-scgi-temp-path=/var/lib/nginx/scgi
–http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit
–with-ipv6 --with-http_ssl_module --with-http_stub_status_module
–with-http_realip_module --with-http_addition_module
–with-http_dav_module
–with-http_geoip_module --with-http_gzip_static_module
–with-http_image_filter_module --with-http_spdy_module
–with-http_sub_module --with-http_xslt_module --with-mail
–with-mail_ssl_module

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,261527,261527#msg-261527

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