Github user mmiklavc commented on the issue:
https://github.com/apache/metron/pull/657
@nickwallen ok, here's the 1-line fix (2 with the static import). Ran this
30+ times in a loop with no failures.
```
...
import static org.mockito.Mockito.reset;
...
@Before
public void setUp() {
reset(logger);
...
}
```
This resets the mock counts prior to each test, thereby eliminating the
problem. I'm not clear why this isn't consistently failing to begin with, but
there it is.
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