Nginx错误日志说明

Posted 2020-10-06

错误日志类型

• 类型1: upstream timed out

• 类型2: connect() failed

• 类型3: no live upstreams

• 类型4: upstream prematurely closed connection

• 类型5: 104: Connection reset by peer

• 类型6: client intended to send too large body

• 类型7: upstream sent no valid HTTP/1.0 header

详细说明

类型	错误日志	原因	解决办法
类型	错误日志	原因	解决办法
1	upstream timed out (110: Connection timed out) while connecting to upstream	nginx与upstream建立tcp连接超时，nginx默认连接建立超时为200ms	排查upstream是否能正常建立tcp连接
1	upstream timed out (110: Connection timed out) while reading response header from upstream	nginx从upstream读取响应时超时，nginx默认的读超时为20s，读超时不是整体读的时间超时，而是指两次读操作之间的超时，整体读耗时有可能超过20s	排查upstream响应请求为什么过于缓慢
2	connect() failed (104: Connection reset by peer) while connecting to upstream	nginx与upstream建立tcp连接时被reset	排查upstream是否能正常建立tcp连接
2	connect() failed (111: Connection refused) while connecting to upstream	nginx与upstream建立tcp连接时被拒	排查upstream是否能正常建立tcp连接
3	no live upstreams while connecting to upstream	nginx向upstream转发请求时发现upstream状态全都为down	排查nginx的upstream的健康检查为什么失败
4	upstream prematurely closed connection	nginx在与upstream建立完tcp连接之后，试图发送请求或者读取响应时，连接被upstream强制关闭	排查upstream程序是否异常，是否能正常处理http请求
5	recv() failed (104: Connection reset by peer) while reading response header from upstream	nginx从upstream读取响应时连接被对方reset	排查upstream应用已经tcp连接状态是否异常
6	client intended to send too large body	客户端试图发送过大的请求body，nginx默认最大允许的大小为1m，超过此大小，客户端会受到http 413错误码	调整请求客户端的请求body大小； 调大相关域名的nginx配置：client_max_body_size；
7	upstream sent no valid HTTP/1.0 header	nginx不能正常解析从upstream返回来的请求行	排查upstream http响应异常

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nginx日志错误日志说明

错误信息	错误说明
错误信息	错误说明
"upstream prematurely（过早的） 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)"	（1）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；  （2）客户关掉了浏览器，而服务器还在给客户端发送数据；  （3）浏览器端按了Stop
"(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 servers are inside upstream"	upstream下未配置server
"no live upstreams while connecting to upstream"	upstream下的server全都挂了
"SSL_do_handshake() failed"	SSL握手失败
"SSL_write() failed (SSL:) while sending to client"
"(13: Permission denied) while reading upstream"
"(98: Address already in use) while connecting to upstream"
"(99: Cannot assign requested address) while connecting to upstream"
"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
"send() failed (111: Connection refused)"

ref：http://blog.sina.com.cn/s/blog_6e07f1eb010185hp.html