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https://issues.apache.org/jira/browse/CASSANDRA-16850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17405439#comment-17405439
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David Capwell commented on CASSANDRA-16850:
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seems like jvm-dtest upgrade tests have been broken for some time... so the
errors there look to be before this commit:
https://ci-cassandra.apache.org/view/Cassandra%204.1/job/Cassandra-trunk-jvm-dtest-upgrade/lastCompletedBuild/jdk=jdk_1.8_latest,label=cassandra,split=7/testReport/org.apache.cassandra.distributed.upgrade/CompactStorageUpgradeTest/compactStorageUpgradeTest/
> Add client warnings and abort to tombstone and coordinator reads which go
> past a low/high watermark
> ---------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-16850
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16850
> Project: Cassandra
> Issue Type: Improvement
> Components: Observability/Logging
> Reporter: David Capwell
> Assignee: David Capwell
> Priority: Normal
> Fix For: 4.1
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> We currently will abort queries if we hit too many tombstones, but its common
> that we would want to also warn clients (client warnings) about this before
> we get that point; its also common that different logic would like to be able
> to warn/abort about client options (such as reading a large partition). To
> allow this we should add a concept of low/high watermarks (warn/abort) to
> tombstones and coordinator reads.
> Another issue is that current aborts look the same as a random failure, so
> from an SLA point of view it would be good to differentiate between user
> behavior being rejected and unexplained issue.
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