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https://issues.apache.org/jira/browse/CASSANDRA-12311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15410267#comment-15410267
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Tyler Hobbs commented on CASSANDRA-12311:
-----------------------------------------
I've got a [python driver
branch|https://github.com/thobbs/python-driver/tree/PYTHON-619-failure-map] up
that supports this. The ticket is
[PYTHON-619|https://datastax-oss.atlassian.net/browse/PYTHON-619]. I also
started a [dtest
branch|https://github.com/thobbs/cassandra-dtest/tree/CASSANDRA-12311-tests]
that updates the {{pushed_notifications_test}} test case mentioned above as an
example. Note that you'll have to install the python driver from my branch in
order to run this test.
> Propagate TombstoneOverwhelmingException to the client
> ------------------------------------------------------
>
> Key: CASSANDRA-12311
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12311
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Geoffrey Yu
> Assignee: Geoffrey Yu
> Priority: Minor
> Labels: client-impacting, doc-impacting
> Fix For: 4.x
>
> Attachments: 12311-trunk-v2.txt, 12311-trunk-v3.txt,
> 12311-trunk-v4.txt, 12311-trunk-v5.txt, 12311-trunk.txt
>
>
> Right now if a data node fails to perform a read because it ran into a
> {{TombstoneOverwhelmingException}}, it only responds back to the coordinator
> node with a generic failure. Under this scheme, the coordinator won't be able
> to know exactly why the request failed and subsequently the client only gets
> a generic {{ReadFailureException}}. It would be useful to inform the client
> that their read failed because we read too many tombstones. We should have
> the data nodes reply with a failure type so the coordinator can pass this
> information to the client.
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