Central Error Stream

Resource Overview

A Central Error Stream resource can be declared in your stack to emit data that identifies the cause, location, and any specific details of an error when it occurs.

Only one Central Error Stream can be added to a stack at a time.

Event Subscription

Event subscription wires (solid line) connect two or more resources and are required to accomplish certain tasks or improve performance within an application's flow.

The following resources can be subscribed to a Central Error Stream:

• Function

Configurable Properties

Error Message Format

When an error occurs the error object is emitted from the Error as the message. The object contains the following properties:

Field	Type	Description
class	string	Class of the error. Example: IllegalArgumentException
message	string	Error message. Example: 'foo' is an invalid value for argument 'bar'
stack	string	Error stack trace, where provided.
data	Object	Extra error data, where provided.
stackery.node.id	string	ID of the resource that generated the error. Example: a83bd26f
stackery.node.name	string	Name of the resource that generated the error, if the name exists. Example: My Function
stackery.runtime	string	Runtime of generating Function, where available. Example: python
stackery.requestId	string	Request ID that generated the error, if available. Example: 6605b081-6f04-11e6-97ac-c34deb0b3dd9
stackery.message	string	The message passed into the function at invocation time, if available. Example: {"id": 5, "action": "PUT"}