Converting collections or UDTs to raw bytes is nonsensical - it
allows reading raw serialized bytes which have no meaningful
interpretation.
patch by Mikołaj Diakowski; reviewed by Stefan Miklosovic, Brandon Williams for CASSANDRA-20982
- DurabilityQueue/ShardScheduler deadlock
- MemtableCleanerThread.Cleanup assumes Boolean parameter is non-null, which is invalid if an exception has been thrown
- AccordDurableOnFlush may be invoked while Accord is starting up, so should use AccordService.unsafeInstance
- AccordCache shrink without lock regression
- Cleanup system_accord compaction leftovers before starting up
- system_accord_debug.txn order
- system_accord_debug.txn_blocked_by order
- system_accord_debug.shard_epochs order
Improve:
- Set DefaultProgressLog.setMode(Catchup) during Catchup
- IdentityAccumulators only need to readLast, not readAll
- Limit number of static segments we compact at once to sstable
- If too many static segments on startup, wait for them to be compacted
patch by Benedict; reviewed by Alex Petrov for CASSANDRA-21053
Also Fix:
- Restore MaxDecidedRX on replay
- When catchup_on_start_exit_on_failure == false, should startup on any kind of failure, not only timeout
- lazy vtable LIMIT clause regression
- DurabilityService.onEpochRetired
- Command.validate when uniqueHlc differs
- Avoid unsafe publication of AccordExecutor to scheduledFastTasks
- AccordCache hitRate metric names
- use long for return type of DurationSpec.toNanoseconds
- Repair without all replicas should not request all Accord replicas participate
- ExecuteAtSerializer
- SyncPoints should be coordinated in an epoch that contains the ranges
Also Improve:
- Split Accord startup into local+distributed, ensure we
- Add logging to FetchDurableBefore on startup
- Add randomised testing of AbstractLazyVirtualTable
- Add validation of lazy virtual table key ordering
- Don't send requests to faulty replicas
- shrinkOrEvict large objects without holding lock
- Accord dtest shutdown
patch by Benedict; reviewed by Alex Petrov for CASSANDRA-21042
* Better handling of DOWN unupgraded nodes
* Test that aborted CMS initialization cleans up state properly
* Clean up orphaned PreInitialize entries in the log on bounce
* Unconditionally reset initiator during abort
* Ensure that metadata log entries aren't exchanged before CMS
initialization is complete
* Precalculate common serialization version, excluding non-upgraded and
LEFT nodes
* Decide if metadata-impacting upgrade is in progress using min common
version
* Add metadata identifier to nodetool cms output
Patch by Sam Tunnicliffe and Marcus Eriksson; reviewed by Sam
Tunnicliffe and Marcus Eriksson for CASSANDRA-21036
Co-authored-by: Marcus Eriksson <marcuse@apache.org>
Co-authored-by: Sam Tunnicliffe <samt@apache.org>
For GC like ShenandoahGC/ZGC etc., there are GC events that do not have STW pauses (Concurrent phases).
Operator might find it reasonable to use lower thresholds for events require STW pauses and higher thresholds for concurrent phases.
gc_concurrent_phase_log_threshold and gc_concurrent_phase_warn_threshold configuration options are introduced in cassandra.yaml
Patch by Yuqi Yan; reviewed by Dmitry Konstantinov, Stefan Miklosovic for CASSANDRA-20980
Co-authored-by: Stefan Miklosovic
- Estimate memory required to allocate for applying a partition update into a memtable and allocate this memory in one shot, then use it as a request-local SLAB
- Reduce contention by switching MemtableAllocator.SubAllocator#owns from updates via AtomicLongFieldUpdater to LongAdder usage. MemtableAllocator.SubAllocator#acquired(..) method updates "owns" value but does not use the updated result.
- Reduce contention by replacing of CAS loop in MemtablePool.SubPool#tryAllocate with allocatedUpdater.addAndGet(this, size)
Patch by Dmitry Konstantinov; reviewed by Michael Semb Wever for CASSANDRA-20226
Before the fix during a capacity extension BufferPoolAllocator returned to BufferPool a sliced ByteBuffer wrapper object instead of the originally allocated one, so the ByteBuffer was not recycled by BufferPool
Adjust BufferPoolAllocatorTest to test the ByteBuf capacity extension with a real BufferPool behavior
Patch by Dmitry Konstantinov; reviewed by Michael Semb Wever for CASSANDRA-20753
Alan Wang