Prefer client errors while collecting ES|QL failures (#122290) #122463
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Currently, the ES|QL failure collectors categorize errors into non-cancellation and cancellation errors, preferring to return non-cancellation errors to users. With the retry on shard-level failure, the failure collector can now collect more categories of errors: client errors, server errors, shard-unavailable errors, and cancellation errors. For easier diagnostics and operations (especially on serverless), the failure collectors prefer returning client (4xx) errors over server (5xx) errors, shard-unavailable errors, and cancellation errors. Relates elastic#120774
dnhatn
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Currently, the ES|QL failure collectors categorize errors into non-cancellation and cancellation errors, preferring to return non-cancellation errors to users. With the retry on shard-level failure, the failure collector can now collect more categories of errors: client errors, server errors, shard-unavailable errors, and cancellation errors. For easier diagnostics and operations (especially on serverless), the failure collectors prefer returning client (4xx) errors over server (5xx) errors, shard-unavailable errors, and cancellation errors.
Relates #120774