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  1. Apache Arrow
  2. ARROW-3343

[Java] Java tests fail non-deterministically with memory leak from Flight tests

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      see eg https://travis-ci.org/apache/arrow/jobs/434044723

      Starting server.
      [ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.129 s <<< FAILURE! - in org.apache.arrow.flight.example.TestExampleServer
      [ERROR] putStream(org.apache.arrow.flight.example.TestExampleServer)  Time elapsed: 0.129 s  <<< ERROR!
      java.lang.IllegalStateException: 
      Memory was leaked by query. Memory leaked: (66)
      Allocator(flight-server) 0/66/134/9223372036854775807 (res/actual/peak/limit)
      	at org.apache.arrow.flight.example.TestExampleServer.after(TestExampleServer.java:66)
      

      This seems to fail both in JDK8 and JDK9 but not consistently

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              jnadeau Jacques Nadeau
              wesm Wes McKinney
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