# 2.5.15.5. WorkerMissingGenerator

class buildbot.reporters.WorkerMissingGenerator

This report generator sends a message when a worker goes missing.

The following parameters are supported:

`workers`

  (`"all"` or a list of strings, optional). Identifies the workers for which to send a message. `"all"` (the default) means that a message will be sent when any worker goes missing. The list version of the parameter specifies the names of the workers.

`message_formatter`

  (optional, instance of `reporters.MessageFormatterMissingWorker`) This is an optional instance of the `reporters.MessageFormatterMissingWorker` class that can be used to generate a custom message.