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https://issues.apache.org/jira/browse/CASSANDRA-18845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17764467#comment-17764467
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Cameron Zemek edited comment on CASSANDRA-18845 at 9/13/23 3:32 AM:
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I have attached patched. Tested this as follows:
# Spin up single node cluster. Works due to epSize == liveSize check that lets
it bypass the liveSize > 1 check
# Spin up 3 node cluster. All 3 nodes start up NTR as expected.
# Shutdown all nodes. Start up first node it stays waiting in gossip due to
the liveSize > 1 requirement
# Start up second node. Now both nodes start NTR since liveSize > 1 and there
are no other incoming `is now UP` events so gossip looks settled.
NOTE: I had to disable the if condition for call to Gossiper.waitToSettle()
since was using loopback addresses
was (Author: cam1982):
I have attached patched. Tested this as follows:
# Spin up single node cluster. Works due to epSize == liveSize check that lets
it bypass the liveSize > 1 check
# Spin up 3 node cluster. All 3 nodes start up NTR as expected.
# Shutdown all nodes. Start up first node it stays waiting in gossip due to
the liveSize > 1 requirement
# Start up second node. Now both nodes start NTR since liveSize > 1 and there
are no other incoming `is now UP` events so gossip looks settled.
> 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: 18845-3.11.patch
>
>
> 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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