Github user rmetzger commented on the issue:
https://github.com/apache/flink/pull/3911
I tried it locally, but got some weird results:
```
Found error in log files.
Found exception in log files.
Found non-empty file
build-target/log/flink-robert-jobmanager-0-robert-da.out
Found non-empty file
build-target/log/flink-robert-taskmanager-0-robert-da.out
One or more tests FAILED.
```
It seems that the script deleted the log files. Is that intended?
Also it seemed that WC was running correctly, so I wonder why it failed.
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