A bug in code deployed to a backend service prevented document import from succeeding for several hours.  The converter was then rolled back to a previous version, restoring service. The bug has been found and corrected.

Additionally, we are making several improvements to the backend release process both improve release quality and detect this type of failure more rapidly. These steps include:

• Improvements to automated test coverage in the build and deployment process; a test that would have caught this bug was not run prior to the deployment.
• Investigating ways to improve our abilities to assess the liveness/health of backend services to detect failures more quickly.
• Improving internal build notifications to help focus investigations on services that have been redeployed recently.