[
https://issues.apache.org/jira/browse/CASSANDRA-20910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18058994#comment-18058994
]
Arup Chauhan edited comment on CASSANDRA-20910 at 2/17/26 5:46 AM:
-------------------------------------------------------------------
Hi [~bereng]
I would like to help on CASSANDRA-20910 in a scoped way.
I can focus on making the \{{foreign node join }}rejection consistent across
the relevant gossip/join entry points, and add or strengthen a regression test
that asserts a peer with mismatched cluster identity cannot be admitted.
I am happy to do this either by contributing commits on top of the existing PR
(if you prefer keeping everything together), or by opening a small companion
draft PR focused on one slice (tests, logging, or enforcement) and linking it
back to this Jira.
Please let me know what scope would be most helpful.
was (Author: JIRAUSER312424):
Hi [~bereng] and [~chrisjmiller]
I would like to help on CASSANDRA-20910 in a scoped way.
I can focus on making the \{{foreign node join }}rejection consistent across
the relevant gossip/join entry points, and add or strengthen a regression test
that asserts a peer with mismatched cluster identity cannot be admitted.
I am happy to do this either by contributing commits on top of the existing PR
(if you prefer keeping everything together), or by opening a small companion
draft PR focused on one slice (tests, logging, or enforcement) and linking it
back to this Jira.
Please let me know what scope would be most helpful.
> Instances from a 2nd ring join another ring when running on the same nodes
> ---------------------------------------------------------------------------
>
> Key: CASSANDRA-20910
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20910
> Project: Apache Cassandra
> Issue Type: Bug
> Components: Cluster/Membership
> Reporter: Chris Miller
> Assignee: Berenguer Blasi
> Priority: Urgent
> Fix For: 4.1.x, 5.0.x, 6.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Hi,
> We experienced an issue today whereby instances from a 2nd ring join another
> ring when running on the same nodes following a rolling restart which took
> place following an OS patch and node reboot (both on Cassandra 4.1.2).
> The cluster names and storage ports are different and this type of activity
> normally runs without issue.
> Any ideas as to what could have happened? Could this be a bug?
> The seeds use the same IP addresses but no storage port is configured in the
> seeds parameter, should we add the storage port to prevent this from
> happening again? Any thoughts?
> Messages like the following could be seen on ring 1.
> INFO [GossipStage:1] 2025-09-18 04:11:49,040 Gossiper.java:1434 - Node
> /XX.XX.XX.190:7002 is now part of the cluster
> INFO [GossipStage:1] 2025-09-18 04:11:49,043 TokenMetadata.java:539 -
> Updating topology for /XX.XX.XX.190:7002
> INFO [Messaging-EventLoop-3-8] 2025-09-18 04:11:49,044
> OutboundConnection.java:1153 -
> /XX.XX.XX.61:7000(/XX.XX.XX.61:41920)->/XX.XX.XX.190:7002-URGENT_MESSAGES-7af53583
> successfully connected, version = 12, framing = CRC, encryption = unencrypted
> INFO [GossipStage:1] 2025-09-18 04:11:49,044 TokenMetadata.java:539 -
> Updating topology for /XX.XX.XX.190:7002
> INFO [GossipStage:1] 2025-09-18 04:11:49,044 Gossiper.java:1434 - Node
> /XX.XX.XX.214:7002 is now part of the cluster
> INFO [Messaging-EventLoop-3-3] 2025-09-18 04:11:49,046
> OutboundConnection.java:1153 -
> /XX.XX.XX.61:7000(/XX.XX.XX.61:62628)->/XX.XX.XX.214:7002-URGENT_MESSAGES-0515b24a
> successfully connected, version = 12, framing = CRC, encryption = unencrypted
> INFO [GossipStage:1] 2025-09-18 04:11:49,046 TokenMetadata.java:539 -
> Updating topology for /XX.XX.XX.214:7002
> INFO [GossipStage:1] 2025-09-18 04:11:49,046 TokenMetadata.java:539 -
> Updating topology for /XX.XX.XX.214:7002
> INFO [GossipStage:1] 2025-09-18 04:11:49,047 Gossiper.java:1434 - Node
> /XX.XX.XX.247:7002 is now part of the cluster
> INFO [Messaging-EventLoop-3-4] 2025-09-18 04:11:49,048
> InboundConnectionInitiator.java:529 -
> /XX.XX.XX.190:7002(/XX.XX.XX.190:60180)->/XX.XX.XX.61:7000-URGENT_MESSAGES-edfb2d8f
> messaging connection established, version = 12, framing = LZ4, encryption =
> unencrypted
> Messages like the following in ring 2:
> WARN [GossipStage:1] 2025-09-18 04:11:49,304
> GossipDigestSynVerbHandler.java:58 - ClusterName mismatch from
> /XX.XX.XX.247:7000 ring1!=ring2
> WARN [GossipStage:1] 2025-09-18 04:11:49,819
> GossipDigestSynVerbHandler.java:58 - ClusterName mismatch from
> /XX.XX.XX.108:7000 ring1!=ring2
> WARN [GossipStage:1] 2025-09-18 04:11:51,598
> GossipDigestSynVerbHandler.java:58 - ClusterName mismatch from
> /XX.XX.XX.190:7000 ring1!=ring2
> WARN [GossipStage:1] 2025-09-18 04:11:52,361
> GossipDigestSynVerbHandler.java:58 - ClusterName mismatch from
> /XX.XX.XX.111:7000 ring1!=ring2
> WARN [GossipStage:1] 2025-09-18 04:11:53,489
> GossipDigestSynVerbHandler.java:58 - ClusterName mismatch from
> /XX.XX.XX.84:7000 ring1!=ring2
> WARN [GossipStage:1] 2025-09-18 04:11:58,322
> GossipDigestSynVerbHandler.java:58 - ClusterName mismatch from
> /XX.XX.XX.247:7000 ring1!=ring2
> Instances from ring2 were listed in nodetool describecluster as unreachable
> under schema versions.
> They were also listed as DN under nodetool status.
> The nodetool removenode command was used to remove the instances successfully.
> Regards,
> Chris.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
