Kitex retry mechanism

Kitex Retry mechanism

When will I try again ？

kitex Crazy Jane currently has the following three retry mechanisms ：

• Time out to try again
• Backup Request( No response received for a period of time , retry )
• Connection failed. Try again

The framework currently has three types of retries ： Time out to try again 、Backup Request, Failed to create connection. Try again （ Default ）. The connection failure is a network level problem , Because the request was not sent , The framework will retry by default , Business needs no attention .

Time out to try again

Timeout exception due to network jitter , High downstream load or GC And so on GC Jamming leads to timeout .

How to set the retrying policy ？

There are generally three kinds of exceptions ：

• Business customization exception
• Timeout exception
• Non timeout framework class exception

There are generally two ways to make abnormal business judgments

• Thrown downstream Error

• The error code returned by the downstream

• return Error The custom exception configuration method is as follows ：

RetryWithError(IsErrorRetry)

• adopt BaseResp Custom error code configuration

RetryWithResult(IsResultRetry)

• Retry count configuration
  Maximum number of retries , Stop retrying if the maximum number of retries is exceeded .

WithMaxRetry