CASSANDRA-20476 Cluster is unable to recover after shutdown if IPs change - #4979

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beobal wants to merge 39 commits into

apache:cassandra-6.0from

beobal:samt/CASSANDRA-20476

Commits on Aug 6, 2026

[CASSANDRA-20476] Add dtest for CMS rediscovery
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422b961
[CASSANDRA-20476] Introduce CMSLookup
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964eee5
[CASSANDRA-20476] Perform rediscovery of CMS at startup if addresses change
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cf86e62
[CASSANDRA-20476] Attempt to wait for all address changes to be enacted before allowing startup to proceed
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5b16a24
[CASSANDRA-20476] Some minor logging additions
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6713384
[CASSANDRA-20476] Make sure to start messaging service

Sam Tunnicliffe
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2056665
[CASSANDRA-20476] Don't attempt to catch up from peers or CMS while log processing is suspended
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acbc221
[CASSANDRA-20476] Remove unused CMSLookup.addressMap
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be62fed
[CASSANDRA-20476] Remove unnecessary map retrievals
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798fb29
[CASSANDRA-20476] Make CMSLookup.overrides an ImmutableMap
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7a447e9
[CASSANDRA-20476] When CMSLookup is RETIRED, remove log listener
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b3f864a
[CASSANDRA-20476] Include seeds in initial rediscovery candidates
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a299e91
[CASSANDRA-20476] Make number of discovery rounds configurable
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bc84991
[CASSANDRA-20476] Improve comment about target quorum size during rediscovery
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8c4bd76
[CASSANDRA-20476] Simplify Discovery.state to a boolean
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4215e9d
[CASSANDRA-20476] Include node ids in CMS description
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4acb0b7
[CASSANDRA-20476] Reduce message timeout when sending Startup transform
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c277a80
[CASSANDRA-20476] Don't attempt rediscovery if upgrading from a post CEP-21, pre V9 version
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7216f59
[CASSANDRA-20476] Fix ip changes while still in gossip mode

Marcus Eriksson
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7fa9474
[CASSANDRA-20476] Don't return CMS_ONLY Discovery responses when constructing a CMSLookup

Sam Tunnicliffe
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492629f
[CASSANDRA-20476] Minor logging changes

Sam Tunnicliffe
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e89510b
[CASSANDRA-20476] Relocate Discovery to new package

Sam Tunnicliffe
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b3280d5
[CASSANDRA-20476] Include ClusterMetadata.metadataId in survey req/rsp messages

Sam Tunnicliffe
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22b9c4d
[CASSANDRA-20476] Lower ProgressBarrier backoff in DiscoverNewCMSTest

Sam Tunnicliffe
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e410390
[CASSANDRA-20476] Improvements to RemoteProcessor.CandidateIterator
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f8fb90a
[CASSANDRA-20476] Break up new long running test
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32687a4
[CASSANDRA-20476] Ensure proper exit from NewGossiper shadow round after upgrade
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a6fb53f
[CASSANDRA-20476] Include current CMS member endpoints in rediscovery response
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18fe81e
[CASSANDRA-20476] Survey request/response improvements
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c0b30d3
[CASSANDRA-20476] Exit startup once local address changes have been committed
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998577a
[CASSANDRA-20476] Make CandidateIterator element set thread safe
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06cb2fd
[CASSANDRA-20476] Assert that lazily initialized CMS membership fields are null when refreshing CMSLookup
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fa6c323
[CASSANDRA-20476] ShadowRoundHandler uses markDone() after receiving sufficient acks
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24afec8
[CASSANDRA-20476] Reword comment
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96d6cb9
[CASSANDRA-20476] Avoid double lookup in CMSLookup internal EndpointLookup impl
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e39b2df
[CASSANDRA-20476] In DefaultReplicator, ensure node ids and endpoint lookup are based on the same ClusterMetadata instance
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1c45ed8
[CASSANDRA-20476] Update response handler definition for new Discovery verbs
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3ac6a67
[CASSANDRA-20476] add tests for CMSLookup::rebuild
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f199980
[CASSANDRA-20476] tweak comment
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952e51b