elasticsearch/docs/reference/ingestion-tools/enrich-processor/fail-processor.md

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Fail	https://www.elastic.co/guide/en/elasticsearch/reference/current/fail-processor.html

Fail processor [fail-processor]

Raises an exception. This is useful for when you expect a pipeline to fail and want to relay a specific message to the requester.

$$$fail-options$

Name	Required	Default	Description
message	yes	-	The error message thrown by the processor. Supports template snippets.
description	no	-	Description of the processor. Useful for describing the purpose of the processor or its configuration.
if	no	-	Conditionally execute the processor. See Conditionally run a processor.
ignore_failure	no	false	Ignore failures for the processor. See Handling pipeline failures.
on_failure	no	-	Handle failures for the processor. See Handling pipeline failures.
tag	no	-	Identifier for the processor. Useful for debugging and metrics.

{
  "fail": {
    "if" : "ctx.tags.contains('production') != true",
    "message": "The production tag is not present, found tags: {{{tags}}}"
  }
}