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https://issues.apache.org/jira/browse/CASSANDRA-10905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15110470#comment-15110470
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Sam Tunnicliffe commented on CASSANDRA-10905:
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The dtest makes an invalid assumption that a specific node will act as 
coordinator for a particular query. Usually this is true, but occasionally it 
may not be, leading to the flapping. [This 
PR|https://github.com/riptano/cassandra-dtest/pull/758] fixes the dtest, so 
I'll close this once that's merged.

> secondary_indexes_test.py:TestSecondaryIndexes.test_only_coordinator_chooses_index_for_query
>  flaps on 3.0+
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-10905
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10905
>             Project: Cassandra
>          Issue Type: Sub-task
>            Reporter: Jim Witschey
>            Assignee: Sam Tunnicliffe
>             Fix For: 3.0.x
>
>
> This test flaps when it expects to find 1 of each of several trace events, 
> but doesn't find some of them. I noticed it on 3.0:
> http://cassci.datastax.com/job/cassandra-3.0_dtest/438/testReport/junit/secondary_indexes_test/TestSecondaryIndexes/test_only_coordinator_chooses_index_for_query/history/
> But I've also seen it on trunk, so it would appear it hasn't been fixed:
> http://cassci.datastax.com/job/trunk_dtest/831/testReport/junit/secondary_indexes_test/TestSecondaryIndexes/test_only_coordinator_chooses_index_for_query/



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