Transient failure on io.druid.indexing.common.task.RealtimeIndexTaskTest testBasics

[fjy]

Build https://travis-ci.org/druid-io/druid/jobs/98378549

io.druid.indexing.common.task.RealtimeIndexTaskTest
testBasics(io.druid.indexing.common.task.RealtimeIndexTaskTest)  Time elapsed: 12.411 sec  <<< ERROR!
java.lang.Exception: test timed out after 10000 milliseconds
    at java.lang.Thread.sleep(Native Method)
    at io.druid.indexing.common.task.RealtimeIndexTaskTest.testBasics(RealtimeIndexTaskTest.java:207)