Flaky-test: org.apache.distributedlog.TestTruncate

[dlg99]

mvn test -f stream/distributedlog/core/pom.xml

[ERROR] Tests run: 7, Failures: 0, Errors: 3, Skipped: 0, Time elapsed: 112.456 s <<< FAILURE! - in org.apache.distributedlog.TestTruncate
[ERROR] org.apache.distributedlog.TestTruncate.testTruncation  Time elapsed: 20.812 s  <<< ERROR!
org.apache.distributedlog.exceptions.BKTransmitException: Failed to write to bookkeeper; Error is (-6) Not enough non-faulty bookies available : -6

The tests flake (sometimes fail with error above, sometime VM crashes) on my mac but pass if I run them one by one:

mvn test -f stream/distributedlog/core/pom.xml -Dtest=org.apache.distributedlog.TestTruncate#testPurgeLogs
mvn test -f stream/distributedlog/core/pom.xml -Dtest=org.apache.distributedlog.TestTruncate#testTruncation
mvn test -f stream/distributedlog/core/pom.xml -Dtest=org.apache.distributedlog.TestTruncate#testExplicitTruncation
mvn test -f stream/distributedlog/core/pom.xml -Dtest=org.apache.distributedlog.TestTruncate#testOnlyPurgeSegmentsBeforeNoneFullyTruncatedSegment
mvn test -f stream/distributedlog/core/pom.xml -Dtest=org.apache.distributedlog.TestTruncate#testPartiallyTruncateTruncatedSegments

probably there is some race in test setup/teardown