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Nginx 错误码

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在定位线上服务问题的时候,通常会去查看Nginxerror log

那么 error 的定义, 对查找问题就显得很有帮助

  • upstream prematurely closed connection

请求uri的时候出现的异常,是由于 upstream 还未返回应答给用户时用户断掉连接造成的,对系统没有影响,可以忽略

  • recv() failed (104: Connection reset by peer)

服务器的并发连接数超过了其承载量,服务器会将其中一些连接Down掉;客户关掉了浏览器,而服务器还在给客户端发送数据;

  • (111: Connection refused) while connecting to upstream

用户在连接时,若遇到后端 upstream 挂掉或者不通,会收到该错误

  • (111: Connection refused) while reading response header from upstream

用户在连接成功后读取数据时,若遇到后端 upstream 挂掉或者不通,会收到该错误

  • (111: Connection refused) while sending request to upstream

Nginx 和 upstream 连接成功后发送数据时,若遇到后端 upstream 挂掉或者不通,会收到该错误

  • (110: Connection timed out) while connecting to upstream

nginx 连接后面的 upstream 时超时

  • (110: Connection timed out) while reading upstream

nginx 读取来自 upstream 的响应时超时

  • (110: Connection timed out) while reading response header from upstream

nginx 读取来自 upstream 的响应头时超时

  • (110: Connection timed out) while reading upstream

nginx读取来自 upstream 的响应时超时

  • (104: Connection reset by peer) while connecting to upstream

upstream发送了 RST,将连接重置

  • upstream sent invalid header while reading response header from upstream

upstream 发送的响应头无效

  • upstream sent no valid HTTP/1.0 header while reading response header from upstream

upstream 发送的响应头无效

  • client intended to send too large body

用于设置允许接受的客户端请求内容的最大值,默认值是1M,client 发送的 body 超过了设置值

  • reopening logs

用户发送kill -USR1命令

  • gracefully shutting down

用户发送kill -WINCH命令

  • no live upstreams while connecting to upstream

upstream 下的 server 全都挂了

  • SSL_do_handshake() failed

SSL握手失败

  • ngx_slab_alloc() failed: no memory in SSL session shared cache

ssl_session_cache大小不够等原因造成

  • could not add new SSL session to the session cache while SSL handshaking

ssl_session_cache 大小不够等原因造成

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