The following subcommands have been added:
* abortbootstrap Cancel and undo an inflight bootstrap
* abortmove Cancel and undo an inflight token move
* abortdecommission Cancel and undo an inflight decommission
* assassinate Remove a node from cluster metadata
* resetcms Redefine the CMS membership
* move Modify a node's (single) owned token
* describe Output a summary of the cluster metadata
* forcejoin Force a registered or joining node into a JOINED state
* print Output a full rendering of cluster metadata
* printdirectory Output a full rendering of the directory
* printdataplacements Output the full data placements
Patch by Venkata Harikrishna Nukala; reviewed by Alex Petrov and Sam Tunnicliffe
for CASSANDRA-19151
Resolve broken cross-module xrefs and image/anchor targets across the
cassandra docs tree. Companion to apache/cassandra-website#319 (merged
2026-05-13) under the same JIRA umbrella.
patch by Patrick McFadin; reviewed by Brandon Williams for CASSANDRA-21342
- TransactionStatement token aware routing
- Mitigate convoy effect:
- ExecuteTxnBacklog v1 can execute single key transaction backlogs and disseminate the result
- Direct local execution possible for single key transactions
- Use shardAppliedBefore instead of gcBefore to cleanup CFK faster
Also Improve:
- Introduce distributed tracing
- Combine RejectBefore and MaxConflicts
- Self-addressed messages are delivered directly
- Disable AccordSyncPropagator by default, as incompatible with large clusters
- FastPathStrategy.SIMPLE should not modify fast path contents; FastPathStrategy.UP introduced to adopt this behaviour
- Configurable queue prioritisation
- ProtocolModifiers mostly final
- Remove unnecessary condition check when serializing TxnUpdate
Also Fix:
- SequentialExecutor ownership bug
- BTree.XUpdater.reset()
patch by Benedict; reviewed by Alex Petrov and Ariel Weisberg for CASSANDRA-21361
use compression ratio to scale the amount of remaining disk usage
CompactionInfo::estimatedRemainingWriteBytes is uncompressed, causing compaction to be rejected due to size when it has space to complete
patch by Matt Byrd; reviewed by Dmitry Konstantinov, Marcus Eriksson for CASSANDRA-21245
Co-authored-by: Jon Meredith <jmeredithco@apple.com>
- Clean Shutdown/Restart
- Rebootstrap to allow nodes to rejoin consensus if they are out of sync, or did not shutdown cleanly
Improve:
- Improve efficiency of BTreeReducingRangeMap
- DurableBefore backed by BTreeReducingRangeMap
- Soft reject new transactions when a replica has a backlog of work
- system_accord_debug.command_store_ops supports starting journal replay
Fix:
- Ensure SequentialExecutor.owner is unset only by the owner
- Detect and avoid taking two AccordExecutor locks simultaneously
- MaxConflicts serializer
- tryToExecuteListening after replay, to handle invalidated dependencies
- TxnNamedRead does not close a RowIterator, leading to native memory leaks
- GetLatestDepsNack serialization
- journal.readLast() did not read last
- DefaultRemoteListeners not correctly synchronised
- RangeTxnScanner cancellation assumes was already started
- Start cfk compaction before replay
- txn_graph should avoid visiting parents twice (possible if two different dependency chains connecting them in the graph)
- Topology.cloneEquivalentWithEpoch should also share nodeLookup and ranges, especially to accelerate computeWaitForEpoch/computeScope
- Do not invoke slowReplicaDelay or slowCoordinatorDelay during restore
- Do not fail if slowReplicaDelay or slowCoordinatorDelay are invoked without knowing the transaction
patch by Benedict; reviewed by Alex Petrov and Ariel Weisberg for CASSANDRA-21355
SinglePartitionReadCommand.Group#create - typical single partition select, use singletonList instead of ArrayList + Object[]
SelectStatement#getSliceCommands - remove unnessesary cloning of partition key, it is a part of a very old patch, now we copy all values from Netty buffers
SelectStatement#getSliceCommands - typical single partition select, use singletonList instead of ArrayList + Object[]
SinglePartitionReadQuery.Group#maybeValidateIndex, avoid iterators for restrictionSet if a full partition is selected
patch by Dmitry Konstantinov; reviewed by Francisco Guerrero, Stefan Miklosovic for CASSANDRA-21351
Best effort attempt to get tableId from CFS, fallback to null which
still allows snapshot to be loaded
End result is that nodetool clearsnapshot and listsnapshot function for such
snapshots on restart
In addition to 5.0 patch we move starting SnapshotManager to after TCM is initiliazed.
The consequence of such a move is that cleanup of ephemeral snapshots happens after startup checks pass.
patch by Matt Byrd; reviewed by Stefan Miklosovic, Brandon Williams and Francisco Guerrero for CASSANDRA-21246
Štefan Miklošovič