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https://issues.apache.org/jira/browse/CASSANDRA-12311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15400265#comment-15400265
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Geoffrey Yu commented on CASSANDRA-12311:
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Sure, that sounds reasonable to me. I'll make the changes and update the patch.
> 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
> Fix For: 4.x
>
> Attachments: 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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