# 5.101. Release Notes for Buildbot 0.9.0b4

The following are the release notes for Buildbot 0.9.0b4 This version was released on October 20, 2015.

See Upgrading to Buildbot 0.9.0 for a guide to upgrading from 0.8.x to 0.9.x

## 5.101.1. Master

This version is very similar to 0.9.0b3, re-released due to issues with PyPI uploads.

### 5.101.1.1. Changes for Developers

- The data API’s `startConsuming` method has been removed. Instead of calling this method with a data API path, call `self.master.mq.startConsuming` with an appropriate message routing pattern.

## 5.101.2. Slave

No changes since 0.9.0b3.

## 5.101.3. Details

For a more detailed description of the changes made in this version, see the git log itself:

    git log v0.9.0b3..v0.9.0b4