Github user kaspersorensen commented on the pull request:
https://github.com/apache/metamodel/pull/23#issuecomment-102657676
To track this in the stacktrace I can also recommend that you add
```.operationThreaded(false)``` to the requests that you send. That way you
will not have a stack from another thread, but a stack that you can trace back
to lines in your unittest.
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