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https://issues.apache.org/jira/browse/CASSANDRA-6194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-6194:
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Attachment: 6194.txt
Patch attached to wait for all the contacted replicas on DME. Not sure how
this could cause the test failure though so it's kind of a shot in the dark.
> speculative retry can sometimes violate consistency
> ---------------------------------------------------
>
> Key: CASSANDRA-6194
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6194
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Brandon Williams
> Assignee: Jonathan Ellis
> Fix For: 2.0.2
>
> Attachments: 6194.txt
>
>
> This is most evident with intermittent failures of the short_read dtests.
> I'll focus on short_read_reversed_test for explanation, since that's what I
> used to bisect. This test inserts some columns into a row, then deletes a
> subset, but it performs each delete on a different node, with another node
> down (hints are disabled.) Finally it reads the row back at QUORUM and
> checks that it doesn't see any deleted columns, however with speculative
> retry on this often fails. I bisected this to the change that made 99th
> percentile SR the default reliably by looping the test enough times at each
> iteration to be sure it was passing or failing.
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