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Posted to commits@cassandra.apache.org by "Joel Knighton (JIRA)" <ji...@apache.org> on 2017/09/13 23:28:00 UTC

[jira] [Created] (CASSANDRA-13866) Clock-dependent integer overflow in tests CellTest and RowsTest

Joel Knighton created CASSANDRA-13866:
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             Summary: Clock-dependent integer overflow in tests CellTest and RowsTest
                 Key: CASSANDRA-13866
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13866
             Project: Cassandra
          Issue Type: Bug
          Components: Testing
            Reporter: Joel Knighton
            Assignee: Joel Knighton
            Priority: Trivial


These tests create timestamps from Unix time, but this is done as int math with the result stored in a long. This means that if the test is run at certain times, like 1505177731, corresponding to Tuesday, September 12, 2017, 12:55:31, the test can have two timestamps separated by a single second that reverse their ordering when multiplied by 1000000, such as 1505177731 -> 2147149504 and 1505177732 -> -2146817792. This causes a variety of test failures, since it changes the reconciliation order of these cells.

Note that I've tagged this as trivial because the problem is in the manual construction of timestamps in the test; I know of nowhere  that we make this mistake with real data.



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