[
https://issues.apache.org/jira/browse/CASSANDRA-15350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17027827#comment-17027827
]
Yifan Cai commented on CASSANDRA-15350:
---------------------------------------
Thanks Alex.
Using fuzz to reproduce contentions sounds OK to me.
Having deterministic test cases to precisely produce contentions is also
valuable, IMO. But I am good to not have those test cases being merged as of
now.
I rebased my branch with your improvements commit and added/tweaked test cases
in {{CasWriteTest}}.
Still the same [PR|https://github.com/apache/cassandra/pull/379] and [code
branch|https://github.com/yifan-c/cassandra/tree/cas-exception-changes]. Test
result is
[here.|https://app.circleci.com/github/yifan-c/cassandra/pipelines/458cafcb-117b-443a-ae6c-c089efd6a929/workflows/7742c20d-1a82-47a8-93d0-cc40a542db5f]
> Add CAS “uncertainty” and “contention" messages that are currently propagated
> as a WriteTimeoutException.
> ---------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-15350
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15350
> Project: Cassandra
> Issue Type: Improvement
> Components: Feature/Lightweight Transactions
> Reporter: Alex Petrov
> Assignee: Yifan Cai
> Priority: Normal
> Labels: protocolv5, pull-request-available
> Attachments: Utf8StringEncodeBench.java
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Right now, CAS uncertainty introduced in
> https://issues.apache.org/jira/browse/CASSANDRA-6013 is propagating as
> WriteTimeout. One of this conditions it manifests is when there’s at least
> one acceptor that has accepted the value, which means that this value _may_
> still get accepted during the later round, despite the proposer failure.
> Similar problem happens with CAS contention, which is also indistinguishable
> from the “regular” timeout, even though it is visible in metrics correctly.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
