github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/grpc/Documentation/log_levels.md (about)

     1  # Log Levels
     2  
     3  This document describes the different log levels supported by the grpc-go
     4  library, and under what conditions they should be used.
     5  
     6  ### Info
     7  
     8  Info messages are for informational purposes and may aid in the debugging of
     9  applications or the gRPC library.
    10  
    11  Examples:
    12  - The name resolver received an update.
    13  - The balancer updated its picker.
    14  - Significant gRPC state is changing.
    15  
    16  At verbosity of 0 (the default), any single info message should not be output
    17  more than once every 5 minutes under normal operation.
    18  
    19  ### Warning
    20  
    21  Warning messages indicate problems that are non-fatal for the application, but
    22  could lead to unexpected behavior or subsequent errors.
    23  
    24  Examples:
    25  - Resolver could not resolve target name.
    26  - Error received while connecting to a server.
    27  - Lost or corrupt connection with remote endpoint.
    28  
    29  ### Error
    30  
    31  Error messages represent errors in the usage of gRPC that cannot be returned to
    32  the application as errors, or internal gRPC-Go errors that are recoverable.
    33  
    34  Internal errors are detected during gRPC tests and will result in test failures.
    35  
    36  Examples:
    37  - Invalid arguments passed to a function that cannot return an error.
    38  - An internal error that cannot be returned or would be inappropriate to return
    39    to the user.
    40  
    41  ### Fatal
    42  
    43  Fatal errors are severe internal errors that are unrecoverable.  These lead
    44  directly to panics, and are avoided as much as possible.
    45  
    46  Example:
    47  - Internal invariant was violated.
    48  - User attempted an action that cannot return an error gracefully, but would
    49    lead to an invalid state if performed.