[解決済み】上流からレスポンスヘッダを読み込む際に、上流が送信したヘッダが大きすぎる。

質問

このようなエラーが発生します。

2014/05/24 11:49:06 [error] 8376#0: *54031 upstream sent too big header while reading response header from upstream, client: 107.21.193.210, server: aamjanata.com, request: "GET /the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata. com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/he-brainwash-chronicles sponsored-by-gujarat-government/, %20htt：/the-brainwash-chroniclesがグジャラート政府のスポンサーになっている。 com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.Com/the-gujarat.Com/the-gujarat- Government/, %20https:/aamjanata.Com/the-gujarat-chronicles sponsorized-by-gujarat-government com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.Com/the-gujarat.Com/the-gujarat- Government/, %20https:/aamjanata.Com/the-gujarat-chronicles sponsorized-by-gujarat-government com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.Com/the-gujarat.Com/the-gujarat- Government/, %20https:/aamjanata.Com/the-gujarat-chronicles sponsorized-by-gujarat-government com/the-brainwash-chronicles-sponsored-by-gujarat-government/, %20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/, %20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/, %20https://aamjanata. com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-bain wash-chronicles sponsored-by-gujarat-government/,%21https://aamjarat.com/the-brainwash-chronicles sponsoredby-gujarat com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles sponsoredby-gurarate com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20https:/aamjanata.com/the-brainwash-chronicles-sponsored-by-gujarat-government/,%20ht

いつも同じです。カンマで区切られたURLが何度も何度も繰り返されます。何が原因なのかがわかりません。どなたか心当たりはありませんか？

更新：またエラーです。

http request count is zero while sending response to client

以下はコンフィグです。他にも関係ないものがありますが、この部分を追加・編集しました。

fastcgi_cache_path /var/nginx-cache levels=1:2 keys_zone=WORDPRESS:100m inactive=60m;
fastcgi_cache_key "$scheme$request_method$host$request_uri";
fastcgi_cache_use_stale error timeout invalid_header http_500;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
proxy_buffer_size   128k;
proxy_buffers   4 256k;
proxy_busy_buffers_size   256k;
    # Upstream to abstract backend connection(s) for PHP.
    upstream php {
            #this should match value of "listen" directive in php-fpm pool
            server unix:/var/run/php5-fpm.sock;
    }

そして、サーバーブロックの中で で、$skip_cacheを0に設定します。

    # POST requests and urls with a query string should always go to PHP
    if ($request_method = POST) {
            set $skip_cache 1;
    }
    if ($query_string != "") {
            set $skip_cache 1;
    }

    # Don't cache uris containing the following segments
    if ($request_uri ~* "/wp-admin/|/xmlrpc.php|wp-.*.php|/feed/|index.php|sitemap(_index)?.xml") {
            set $skip_cache 1;
    }

    # Don't use the cache for logged in users or recent commenters
    if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in") {
            set $skip_cache 1;
    }

    location / {
            # This is cool because no php is touched for static content.
            # include the "?$args" part so non-default permalinks doesn't break when using query string
            try_files $uri $uri/ /index.php?$args;
    }


    location ~ \.php$ {
            try_files $uri /index.php;
            include fastcgi_params;
            fastcgi_pass php;
            fastcgi_read_timeout 3000;

            fastcgi_cache_bypass $skip_cache;
            fastcgi_no_cache $skip_cache;

            fastcgi_cache WORDPRESS;
            fastcgi_cache_valid  60m;
    }

    location ~ /purge(/.*) {
        fastcgi_cache_purge WORDPRESS "$scheme$request_method$host$1";
    }`

解決方法は？

conf ファイルに以下を追加してください。

fastcgi_buffers 16 16k; 
fastcgi_buffer_size 32k;