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In Go, how should errors that cannot be caught through recovery be handled?

Barbara Streisand

Apr 02, 2025 pm 01:09 PM

go language

In Go, how should errors that cannot be caught through recovery be handled?

How to gracefully handle errors that cannot be caught `recover` in Go language?

Error handling is crucial when developing Go language using frameworks such as Gin. panic can usually be captured and processed in the middleware through the recover() function, but some errors, such as map corruption or stack overflow caused by concurrent read and write, cannot be captured by recover() . How to deal with this kind of situation?

The key is to understand the severity of these mistakes. They often lead to unpredictable program behavior and even direct crashes. Trying to "save" this situation often does more harm than good.

Never try to capture unprocessable panic . For example, after maps are read and written concurrently, the data may be corrupted, and continuing to run will only make it worse. This is even more so with stack overflow, forcing it to continue will only aggravate the problem.

The best practice is to make the program terminate immediately, rather than attempting to continue running. Trying to continue running in an unrecoverable state will only accumulate more errors, which will eventually lead to more difficult issues to debug and fix.

Therefore, for errors that cannot be caught by recover() , the focus should be on prevention rather than post-remediation. pass:

Good programming practice: Write clear, concise, easy to understand code to reduce potential errors.
Effective concurrency control: Use mutex locks, channels and other mechanisms to avoid concurrent read and write conflicts.
Full Testing: Write unit tests and integration tests to identify and resolve potential problems as early as possible.

to minimize the probability of such errors occurring. A more effective way to prevent them from appearing from the beginning than trying to deal with these catastrophic errors at runtime.

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