nginx network_error ai_generated partial

client closed connection while reading response header from upstream

ID: nginx/client-closed-connection-while-reading-response

Also available as: JSON · Markdown · 中文
82%Fix Rate
85%Confidence
1Evidence
2023-05-12First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
nginx 1.18.0 active — — —
nginx 1.20.2 active — — —
nginx 1.22.1 active — — —
nginx 1.24.0 active — — —
nginx 1.25.3 active — — —

Root Cause

Client disconnects prematurely before nginx finishes reading the upstream response header, typically due to browser timeout or user cancellation.

generic

中文

客户端在Nginx完成从上游读取响应头之前提前断开连接，通常由浏览器超时或用户取消引起。

Official Documentation

http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_ignore_client_abort

Workarounds

  1. 85% success Set proxy_ignore_client_abort on; in the location block: proxy_ignore_client_abort on; 
    Set proxy_ignore_client_abort on; in the location block: proxy_ignore_client_abort on;
  2. 75% success Reduce response generation time by optimizing upstream application or enabling caching: proxy_cache my_cache; proxy_cache_valid 200 1h; 
    Reduce response generation time by optimizing upstream application or enabling caching: proxy_cache my_cache; proxy_cache_valid 200 1h;
  3. 70% success Increase client_header_timeout and client_body_timeout to prevent premature disconnection: client_header_timeout 60s; client_body_timeout 60s; 
    Increase client_header_timeout and client_body_timeout to prevent premature disconnection: client_header_timeout 60s; client_body_timeout 60s;

中文步骤

  1. 在location块中设置 proxy_ignore_client_abort on;
  2. 通过优化上游应用或启用缓存来减少响应生成时间：proxy_cache my_cache; proxy_cache_valid 200 1h;
  3. 增加 client_header_timeout 和 client_body_timeout 以防止过早断开：client_header_timeout 60s; client_body_timeout 60s;

Dead Ends

Common approaches that don't work:

  1. 60% fail

    The issue is client disconnection, not upstream timeout; high timeout may mask the problem but doesn't prevent it.

  2. 80% fail

    Keepalive settings affect connection reuse, not client disconnection during response reading.

  3. 70% fail

    Disabling buffering can increase memory usage and doesn't address the root cause of client disconnection.