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https://issues.apache.org/jira/browse/CASSANDRA-18845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17767052#comment-17767052
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Cameron Zemek commented on CASSANDRA-18845:
-------------------------------------------

with this removed
{code:java}
(epSize == liveSize || liveSize > 1){code}
the j11_dtests just passed. [j11_dtests (120384) - instaclustr/cassandra 
(circleci.com)|https://app.circleci.com/pipelines/github/instaclustr/cassandra/3180/workflows/2f7e6199-d865-4eee-a3b1-9511a4c88a45/jobs/120384]

> Waiting for gossip to settle on live endpoints
> ----------------------------------------------
>
>                 Key: CASSANDRA-18845
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18845
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Cameron Zemek
>            Priority: Normal
>         Attachments: delay.log, example.log, 
> image-2023-09-14-11-16-23-020.png, stream.log, test1.log, test2.log, test3.log
>
>
> This is a follow up to CASSANDRA-18543
> Although that ticket added ability to set cassandra.gossip_settle_min_wait_ms 
> this is tedious and error prone. On a node just observed a 79 second gap 
> between waiting for gossip and the first echo response to indicate a node is 
> UP.
> The problem being that do not want to start Native Transport until gossip 
> settles otherwise queries can fail consistency such as LOCAL_QUORUM as it 
> thinks the replicas are still in DOWN state.
> Instead of having to set gossip_settle_min_wait_ms I am proposing that 
> (outside single node cluster) wait for UP message from another node before 
> considering gossip as settled. Eg.
> {code:java}
>             if (currentSize == epSize && currentLive == liveSize && liveSize 
> > 1)
>             {
>                 logger.debug("Gossip looks settled.");
>                 numOkay++;
>             } {code}



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