Checking the option "Execute concurrent builds if necessary" in a job config leads to SQL exceptions thrown by the integrity-plugin if the build is executed concurrently.
This will happen, even if the concurrently running jobs are executed on different nodes.

On the other hand, if the concurrent execution is initiated by a multiconfiguration project (Matrix Project), it will work without SQL Exceptions.

This way, plugins based on concurrent test execution like parameterized trigger plugin or parallel test execution plugin are unusable together with the integrity-plugin.