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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9764) dtest for many UPDATE batches, low contention fails on trunk
Date Fri, 24 Jul 2015 20:21:04 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14641023#comment-14641023
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Jonathan Ellis commented on CASSANDRA-9764:
-------------------------------------------

[~enigmacurry] is this still a problem with 9863 committed?

> dtest for many UPDATE batches, low contention fails on trunk
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-9764
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9764
>             Project: Cassandra
>          Issue Type: Sub-task
>            Reporter: Jim Witschey
>            Assignee: Sylvain Lebresne
>            Priority: Blocker
>             Fix For: 3.0 alpha 1
>
>
> {{paxos_tests.py:TestPaxos.contention_test_multi_iterations}} fails consistently on trunk
([cassci history|http://cassci.datastax.com/view/trunk/job/trunk_dtest/lastSuccessfulBuild/testReport/paxos_tests/TestPaxos/contention_test_multi_iterations/history/]).
The test works by creating 8 workers, each of which increments an integer 100 times using
UPDATE. Based on the test failures, it looks like 2 or 3 of the updates are consistently dropped.
Other dtests that don't run as many iterations but have more contention succeed.
> I'm assigning you, [~slebresne], because you wrote the test and were the last person
to modify it, but feel free to reassign. Thanks!



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