Wordcount on Docker test failed due to mismatch output hash

Sep 03 00:58:52 FAIL WordCount: Output hash mismatch.  Got d41d8cd98f00b204e9800998ecf8427e, expected 0e5bd0a3dd7d5a7110aa85ff70adb54b.
Sep 03 00:58:52 head hexdump of actual:
head: cannot open '/home/vsts/work/1/s/flink-end-to-end-tests/test-scripts/temp-test-directory-46667176796/out/docker_wc_out*' for reading: No such file or directory
Sep 03 00:58:52 Stopping job timeout watchdog (with pid=174905)
Sep 03 00:58:52 [FAIL] Test script contains errors.
Sep 03 00:58:52 Checking for errors...
Sep 03 00:58:52 No errors in log files.
Sep 03 00:58:52 Checking for exceptions...
Sep 03 00:58:52 No exceptions in log files.
Sep 03 00:58:52 Checking for non-empty .out files...
grep: /home/vsts/work/_temp/debug_files/flink-logs/*.out: No such file or directory
Sep 03 00:58:52 No non-empty .out files.
Sep 03 00:58:52 
Sep 03 00:58:52 [FAIL] 'Wordcount on Docker test (custom fs plugin)' failed after 1 minutes and 5 seconds! Test exited with exit code 1