问题描述
我正在尝试使一些微服务更具弹性，而重试某些类型的HTTP请求将对此有所帮助.
I'm trying to make a few microservices more resilient and retrying certain types of HTTP requests would help with that.
重试超时会给客户带来非常缓慢的体验，因此在这种情况下我不打算重试.重试400秒无济于事，因为错误的请求将在几毫秒后仍然是错误的请求.
Retrying timeouts will give clients a terribly slow experience, so I don't intend to retry in this case. Retrying 400s doesn't help because a bad request will remain a bad request a few milliseconds later.
我想还有其他原因不重试其他几种类型的错误，但是哪些错误以及为什么呢?
I imagine there are other reasons to not retry a few other types of errors, but which errors and why?
推荐答案
有些错误由于看起来是永久性的，因此不应重试:
There are some errors that should not be retried because they seem permanent:
- 400错误的请求
- 401未经授权
- 402需要付款
- 403禁止进入
- 不允许使用405方法
- 406不可接受
- 需要407代理身份验证
- 409冲突-这取决于
- 410已消失
- 411所需长度
- 412前提条件失败
- 413有效载荷过大
- 414 URI太长
- 415不支持的媒体类型
- 416范围无法满足
- 417预期失败
- 418我是茶壶-不确定这个茶壶
- 421错误定向的请求
- 422无法处理的实体
- 423锁定-这取决于资源平均锁定多长时间(?)
- 424依赖关系失败
- 需要426升级-客户端可以自动升级吗?
- 428需要的前提条件-我认为前提条件可以是第二次提交，没有从开始就退出整个过程，但这取决于
- 429请求太多-这取决于但不能快速重试
- 431请求标头字段太大
- 451由于法律原因无法使用
- 400 Bad Request
- 401 Unauthorized
- 402 Payment Required
- 403 Forbidden
- 405 Method Not Allowed
- 406 Not Acceptable
- 407 Proxy Authentication Required
- 409 Conflict - it depends
- 410 Gone
- 411 Length Required
- 412 Precondition Failed
- 413 Payload Too Large
- 414 URI Too Long
- 415 Unsupported Media Type
- 416 Range Not Satisfiable
- 417 Expectation Failed
- 418 I'm a teapot - not sure about this one
- 421 Misdirected Request
- 422 Unprocessable Entity
- 423 Locked - it depends on how long a resource is locked in average (?)
- 424 Failed Dependency
- 426 Upgrade Required - can the client be upgraded automatically?
- 428 Precondition Required - I don't thing that the precondition can befulfiled the second time without retring from the beginning of thewhole process but it depends
- 429 Too Many Requests - it depends but it should not be retried to fast
- 431 Request Header Fields TooLarge
- 451 Unavailable For Legal Reasons
因此，不应重试4 **个客户端错误中的大多数.
So, most of the 4** Client errors should not be retried.
不应重试的5 **个服务器错误:
The 5** Servers errors that should not be retried:
- 500内部服务器错误
- 未实施501
- 502错误的网关-我看到用于临时错误，所以这取决于
- 不支持505 HTTP版本
- 506个变体也可以协商
- 507存储空间不足
- 检测到508循环
- 510未扩展
- 需要511网络身份验证
- 500 Internal Server Error
- 501 Not Implemented
- 502 Bad Gateway - I saw used for temporary errors so it depends
- 505 HTTP Version Not Supported
- 506 Variant Also Negotiates
- 507 Insufficient Storage
- 508 Loop Detected
- 510 Not Extended
- 511 Network Authentication Required
但是，为了使微服务更具弹性，您应该使用 断路器模式并在上游故障时快速失效.
However, in order to make the microservices more resilient you should use the Circuit breaker pattern and fail fast when the upstream is down.
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