jihoonson commented on issue #7890: Set Test timeout higher for robust performance URL: https://github.com/apache/incubator-druid/pull/7890#issuecomment-502222308 That sounds strange. There should be something that shows what the test threads were doing in the thread dump if you dumped while the test was running. What `SegmentManagerThreadSafetyTest` does is basically creating 88 files of 15 bytes each and copying those files into another directory using 4 threads. Both directories where those files are created and copied to are under your temp directory in your local disk. So, even though `future.get()` is a blocking call, I'm not sure how it could take so long time unless there is a sort of bug. I bet it would take less than 1 second even if we do the same thing with a single thread. Travis CI is one of the worst test environment which runs all unit/integration tests with limited resources for every commit, and I've never seen this error before. So, I'm not sure this problem is somehow related to your test environment or not. Would you tell me where you ran those tests? Like CPU cores, Java heap memory, your local disk spec, the command you used to run those tests, etc.
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