Amazon EventBridge event bus log schema

The following reference details the schema for EventBridge event bus log records. Each record represent a step EventBridge performs processing a specific event.

For more information, see Logging event buses .

{    
    "resource_arn": "arn:aws:events:region:account:event-bus/bus-name",
    "request_id": "guid", 
    "event_id": "guid", 
    "invocation_id": "guid",
    "message_timestamp_ms": "date_time",    
    "message_type": "step",  
    "log_level": "TRACE | INFO | ERROR",
    "details": {
      },
    "error": {  
        "http_status_code": code,  
        "error_message": "error_message",  
        "aws_service": "service_name",  
        "request_id": "service_request_id"  
    }  
}

resource_arn

The Amazon Resource Name (ARN) for the event bus.

request_id

The ID of the request.

event_id

The ID of the event being processed.

invocation_id

The ID of the invocation for the event.

message_timestamp_ms

The date and time the log event was emitted.

Unit: millisecond

message_type

The event processing step for which the log record was generated.

For more information on the steps EventBridge performs when processing an event, see What Amazon EventBridge logs for event buses.

Valid values:

• EVENT_INGEST_FAILURE

• EVENT_INGEST_SUCCESS

• EVENT_RECEIPT

• INVOCATION_ATTEMPT_PERMANENT_FAILURE

• INVOCATION_ATTEMPT_RETRYABLE_FAILURE

• INVOCATION_ATTEMPT_START

• INVOCATION_ATTEMPT_SUCCESS

• INVOCATION_ATTEMPT_THROTTLE

• INVOCATION_DLQ

• INVOCATION_FAILURE

• INVOCATION_START

• INVOCATION_SUCCESS

• INVOCATION_THROTTLE_START

• NO_STANDARD_RULES_MATCHED

• RULE_MATCH

• RULE_MATCH_START

log_level

The level of detail specified for the event bus log.

Valid values: ERROR | INFO | TRACE

For more information, see Specifying event bus log level.

details

Contains step details, based on the step detail type.

The fields listed below are returned for the following message types:

• EVENT_INGEST_SUCCESS

• EVENT_INGEST_FAILURE

• EVENT_RECEIPT

• RULE_MATCH_START

{
  "caller_account_id": "account_id",
  "source_time_ms": date_time,
  "source": "source",
  "detail_type": " type",
  "resources": [],
  "event_detail": "{}"
}

The fields listed below are returned for the following message type:

• RULE_MATCH

{
  "rule_arn": "ARN",
  "target_arns": [
    "ARN"
  ],
  "invocation_ids": [
    "guid"
  ]
}

The fields listed below are returned for the following message types:

• INVOCATION_ATTEMPT_START

• INVOCATION_START

• INVOCATION_THROTTLE_START

{
  "rule_arn": "ARN",
  "role_arn": "ARN",
  "target_arn": "ARN",
  "attempt_count": Integer,
  "target_input": "string",
  "target_properties": "string"
}

The fields listed below are returned for the following message types:

• INVOCATION_DLQ

• INVOCATION_FAILURE

• INVOCATION_SUCCESS

{
  "rule_arn": "ARN",
  "role_arn": "ARN",
  "target_arn": "ARN",
  "target_input": "string",
  "target_properties": "string",
  "total_attempts": Integer,
  "final_invocation_status": "status",
  "ingestion_to_start_latency_ms": Integer,
  "ingestion_to_complete_latency_ms": Integer,
  "ingestion_to_success_latency_ms": Integer,
  "target_duration_ms": Integer,
  "target_response_body": "string"
}

The ingestion_to_start_latency_ms and ingestion_to_complete_latency_ms are only included in the first invocation attempt. The ingestion_to_success_latency_ms field is only included for successful invocations.

The fields listed below are returned for the following message types:

• INVOCATION_ATTEMPT_PERMANENT_FAILURE

• INVOCATION_ATTEMPT_RETRYABLE_FAILURE

• INVOCATION_ATTEMPT_SUCCESS

• INVOCATION_ATTEMPT_THROTTLE

{
  "rule_arn": "ARN",
  "role_arn": "ARN",
  "target_arn": "ARN",
  "attempt_type": "FIRST | THROTTLE | RETRY",
  "attempt_count": Integer,
  "invocation_status": "status",
  "target_duration_ms": Integer,
  "target_response_body": "string"
}

dropped_fields

A list of any data fields EventBridge has truncated to keep the record below the 1 MB size limitation.

EventBridge does not include this field if it has truncated any detail fields.

For more information, see Truncating data in event bus logs.

error

Contains information for any error generated during this step. For errors, EV always includes the following fields:

• error_message

• aws_service

And the following fields if available:

• request_id

• http_status_code

If no error was generated during this step, EventBridge does not include this field in the log record.

http_status_code

The HTTP status code returned by the called service.

error_message

The error message returned by the called service.

aws_service

The name of the service called.

request_id

The request ID for this request from the called service.