Adding spring-data-starter-data-jpa with ddl-auto=update causes block at startup

I had posted this issue to wavefront-spring-boot project, but it was identified that there was an issue with Open Tracing. See issue https://github.com/wavefrontHQ/wavefront-spring-boot/issues/27

When I choose to do jpa.hibernate.ddl-auto=update then I get a deadlock during initialization.

I have this dependency included.

<dependency>
    <groupId>io.opentracing.contrib</groupId>
    <artifactId>opentracing-spring-cloud-starter</artifactId>
    <version>0.5.3</version>
</dependency>

Per Stephane.

That's an issue when the EntityManager is bootstrapped asynchronously and OpenTracing is used. If I remove the open tracing starter, the application runs fine.

In the meantime, you can force the bootstrap of JPA in the same thread by adding the following to application.properties:

spring.data.jpa.repositories.bootstrap-mode=default
It looks like opentracing is wrapping the DataSource too aggressively as the proxy contains an aspect that hasn't been initialized yet.

Start with the opentracing-spring-cloud-starter dependency and the EntityManager asynchronous bootstrap path described in the report. Compare startup with ddl-auto=update and with spring.data.jpa.repositories.bootstrap-mode=default, then trace the DataSource proxy initialization; done means JPA starts without a deadlock while OpenTracing remains enabled.