Firebase Docs Reference Firebase.Database.DatabaseExceptionThis error is thrown when the FirebaseDatabase library is unable to operate on the input it has been given. SummaryInheritanceInherits from: Exception Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated November 19, 2016.