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From "Joel Knighton (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-13866) Clock-dependent integer overflow in tests CellTest and RowsTest
Date Wed, 13 Sep 2017 23:49:00 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-13866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joel Knighton updated CASSANDRA-13866:
--------------------------------------
    Status: Patch Available  (was: Open)

Trivial patches for [3.0|https://github.com/jkni/cassandra/tree/CASSANDRA-13866-3.0], [3.11|https://github.com/jkni/cassandra/tree/CASSANDRA-13866-3.11],
and [trunk|https://github.com/jkni/cassandra/tree/CASSANDRA-13866-trunk]. The 3.0 patch merges
forward cleanly.

> 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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