Class ErrorTypeUtil (2.81.0)

Extracts a low-cardinality string representing the specific classification of the error to be used in the ObservabilityAttributes#ERROR_TYPE_ATTRIBUTE attribute.

This value is determined based on the following priority:

1. google.rpc.ErrorInfo.reason : If the error response from the service includes google.rpc.ErrorInfo details, the reason field (e.g., "RATE_LIMIT_EXCEEDED", "SERVICE_DISABLED") will be used. This offers the most precise error cause.
2. Specific Server Error Code: If no ErrorInfo.reason is available and it is not a client-side failure, but a server error code was received:
   • For HTTP: The HTTP status code (e.g., "403", "503").
   • For gRPC: The gRPC status code name (e.g., "PERMISSION_DENIED", "UNAVAILABLE").
3. Client-Side Network/Operational Errors: For errors occurring within the client library or network stack, mapping to specific enum representations from ErrorType . This includes checking the exception for diagnostic markers (e.g., ConnectException or SocketTimeoutException ).
4. Language-specific error type: The class or struct name of the exception or error if available. This must be low-cardinality, meaning it returns the short name of the exception class (e.g. "IllegalStateException" ) rather than its message.
5. Internal Fallback: If the error doesn't fit any of the above categories, "INTERNAL" will be used, indicating an unexpected issue within the client library's own logic.