seems like a bug in BlockingPool .
from build log...
```
testConcurrentTakeBatch(io.druid.collections.BlockingPoolTest) Time elapsed:
0.019 sec <<< FAILURE!
java.lang.AssertionError
at
io.druid.collections.BlockingPoolTest.testConcurrentTakeBatch(BlockingPoolTest.java:246)``` [ Full content available at: https://github.com/apache/incubator-druid/issues/6218 ] This message was relayed via gitbox.apache.org for [email protected]
