github.com/observiq/carbon@v0.9.11-0.20200820160507-1b872e368a5e/docs/types/on_error.md (about)

     1  # `on_error` parameter
     2  The `on_error` parameter determines the error handling strategy an operator should use when it fails to process an entry. There are 2 supported values: `drop` and `send`. 
     3  
     4  Regardless of the method selected, all processing errors will be logged by the operator.
     5  
     6  ### `drop`
     7  In this mode, if an operator fails to process an entry, it will drop the entry altogether. This will stop the entry from being sent further down the pipeline.
     8  
     9  ### `send`
    10  In this mode, if an operator fails to process an entry, it will still send the entry down the pipeline. This may result in downstream operators receiving entries in an undesired format.