ERROR: HHH000299: Could not complete schema update java.lang.NullPointerException

Question

I have a web application in the following environment.

• JPA 2.0
• Spring 3.2.2
• MySQL 5.6.11
• Hibernate 4.2.0 CR1
• Apache Tomca

Answer 1

In my case, the reason was that the disk was out of space.

I have an instance on OpenShift, and first JDBC started throwing some exception because MySQL was down, filling the logs with garbage, and that filled the disk in the end.