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https://issues.apache.org/jira/browse/CASSANDRA-18845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17766949#comment-17766949
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Cameron Zemek commented on CASSANDRA-18845:
-------------------------------------------
Still running, but sharing the results so far:
{noformat}
$ pytest --count=500 --cassandra-dir=/home/grom/dev/cassandra
transient_replication_ring_test.py::TestTransientReplicationRing::test_move_forwards_between_and_cleanup
/home/grom/dtest/lib/python3.10/site-packages/ccmlib/common.py:773:
DeprecationWarning: distutils Version classes are deprecated. Use
packaging.version instead.
return LooseVersion(match.group(1))
====================================== test session starts
=======================================platform linux -- Python 3.10.12,
pytest-7.3.1, pluggy-1.0.0
rootdir: /home/grom/tmp/cassandra-dtest
configfile: pytest.ini
plugins: repeat-0.9.1, flaky-3.7.0, timeout-1.4.2
timeout: 900.0s
timeout method: signal
timeout func_only: False
collected 500 itemstransient_replication_ring_test.py
....................................................... [ 11%]
................................................................{noformat}
> 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, 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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