Commit Graph

11801 Commits

Author SHA1 Message Date
Botond Dénes
f156bcddab Merge 'test: decrease strain in test_startup_response' from Marcin Maliszkiewicz
For 2025.3 and 2025.4 this test runs order of magnitude
slower in debug mode. Potentially due to passwords::check
running in alien thread and overwhelming the CPU (this is
fixed in newer versions).

Decreasing the number of connections in test makes it fast
again, without breaking reproducibility.

As additional measure we double the timeout.

The fix is now cherry-picked to master as sometimes
test fails there too.

(cherry picked from commit 1f1fc2c2ac)

Fixes https://scylladb.atlassian.net/browse/SCYLLADB-795

backport: 2026.1, already on other stable branches

Closes scylladb/scylladb#28848

* github.com:scylladb/scylladb:
  test: add more logs to test_startup_no_auth_response
  test: decrease strain in test_startup_response
2026-03-04 08:55:43 +02:00
Asias He
225b10b683 repair: Fix rwlock in compaction_state and lock holder lifecycle
Consider this:

- repair takes the lock holder
- tablet merge filber destories the compaction group and the compaction state
- repair fails
- repair destroy the lock holder

This is observed in the test:

```
repair - repair[5d73d094-72ee-4570-a3cc-1cd479b2a036] Repair 1 out of 1 tablets: table=sec_index.users range=(432345564227567615,504403158265495551] replicas=[0e9d51a5-9c99-4d6e-b9db-ad36a148b0ea:15, 498e354c-1254-4d8d-a565-2f5c6523845a:9, 5208598c-84f0-4526-bb7f-573728592172:28]

...

repair - repair[5d73d094-72ee-4570-a3cc-1cd479b2a036]: Started to repair 1 out of 1 tables in keyspace=sec_index, table=users, table_id=ea2072d0-ccd9-11f0-8dba-c5ab01bffb77, repair_reason=repair
repair - Enable incremental repair for table=sec_index.users range=(432345564227567615,504403158265495551]
table - Disabled compaction for range=(432345564227567615,504403158265495551] session_id=a13a72cc-cd2d-11f0-8e9b-76d54580ab09 for incremental repair
table - Got unrepaired compaction and repair lock for range=(432345564227567615,504403158265495551] session_id=a13a72cc-cd2d-11f0-8e9b-76d54580ab09 for incremental repair
table - Disabled compaction for range=(432345564227567615,504403158265495551] session_id=a13a72cc-cd2d-11f0-8e9b-76d54580ab09 for incremental repair
table - Got unrepaired compaction and repair lock for range=(432345564227567615,504403158265495551] session_id=a13a72cc-cd2d-11f0-8e9b-76d54580ab09 for incremental repair
repair - repair[5d73d094-72ee-4570-a3cc-1cd479b2a036]: get_sync_boundary: got error from node=0e9d51a5-9c99-4d6e-b9db-ad36a148b0ea, keyspace=sec_index, table=users, range=(432345564227567615,504403158265495551], error=seastar::rpc::remote_verb_error (Compaction state for table [0x60f008fa34c0] not found)
compaction_manager - Stopping 1 tasks for 1 ongoing compactions for table sec_index.users compaction_group=238 due to tablet merge
compaction_manager - Stopping 1 tasks for 1 ongoing compactions for table sec_index.users compaction_group=238 due to tablet merge

....

scylla[10793] Segmentation fault on shard 28, in scheduling group streaming
```

The rwlock in compaction_state could be destroyed before the lock holder
of the rwlock is destroyed. This causes user after free when the lock
the holder is destroyed.

To fix it, users of repair lock will now be waited when a compaction
group is being stopped.
That way, compaction group - which controls the lifetime of rwlock -
cannot be destroyed while the lock is held.
Additionally, the merge completion fiber - that might remove groups -
is properly serialized with incremental repair.

The issue can be reproduced using sanitize build consistently and can not
be reproduced after the fix.

Fixes #27365

Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
2026-03-03 21:05:15 -03:00
Dario Mirovic
3db74aaf5f test: maintenance socket role management
Introduce a test that cover:
- Server startup without credentials config seeding with no roles created
- Await maintenance socket role management to be enabled
- `CREATE ROLE`, `ALTER ROLE`, and `DROP ROLE` statement execution success

All the tests in the test_maintenance_socket.py module take 2-3 seconds
to execute.

Explicitly shut down Cluster objects to prevent 'RuntimeError: cannot
schedule new futures after shutdown'.

Refs SCYLLADB-409
2026-03-03 23:57:50 +01:00
Dario Mirovic
f74fe22386 test: cluster: add logs to test_maintenance_socket.py
Add logs to test_maintenance_socket.py test test_maintenance_socket.
This approach offers additional visibility in case of test failure.
Such logs will be added to new tests in a follow up patch in this
patch series.

Refs SCYLLADB-409
2026-03-03 23:42:25 +01:00
Dario Mirovic
0e5ddec2a8 test: pylib: fix connect_driver handling when adding and starting server
When connect_driver=False, the expected server up state should be
capped to HOST_ID_QUERIED. This is to avoid waiting for CQL readiness,
which requires a superuser to be present.

This logic was only in ScyllaCluster.server_start. ManagerClient.server_add
with start=True and connect_driver=False would still wait for CQL and hang
if no superuser is present. The workaround was to call
ManagerClient.server_add(start=False, connect_driver=False) followed by
ManagerClient.server_start(connect_driver=False).

This patch moves the capping from ScyllaCluster.server_start to
ManagerClient.server_add and ManagerClient.server_start, where connect_driver
is processed. ScyllaCluster only receives the already resolved
expected_server_up_state value.

Refs SCYLLADB-409
2026-03-03 23:42:25 +01:00
Dario Mirovic
fd17dcbec8 auth: do not create default 'cassandra:cassandra' superuser
Changes the behavior of default superuser creation.
Previously, without configuration 'cassandra:cassandra' credentials
were used. Now default superuser creation is skipped if not configured.

The two ways to create default superuser are:
- Config file - auth_superuser_name and auth_superuser_salted_password fields
- Maintenance socket - connect over maintenance socket and CREATE/ALTER ROLE ...

Behavior changes:

Old behavior:
- No config - 'cassandra:cassandra' created
- auth_superuser_name only - <name>:cassandra created
- auth_superuser_salted_password only - 'cassandra:<password>' created
- Both specified - '<name>:<password>' created

New behavior:
- No config - no default superuser
    - Requires maintenance socket setup
- auth_superuser_name only - '<name>:' created WITHOUT password
    - Requires maintenance socket setup
- auth_superuser_salted_password only - no default superuser
- Both specified - '<name>:<password>' created

Fixes SCYLLADB-409
2026-03-03 23:42:25 +01:00
Dario Mirovic
3bef493a35 auth: remove class registrator usage
This patch removes class registrator usage in auth module.
It is not used after switching to factory functor initialization
of auth service.

Several role manager, authenticator, and authorizer name variables
are returned as well, and hardcoded inside qualified_java_name method,
since that is the only place they are ever used.

Refs SCYLLADB-409
2026-03-03 22:31:35 +01:00
Dario Mirovic
eab24ff3b0 auth: instantiate auth service with factory functors
Auth service is instantiated with the constructor that accepts
service_config, which then uses class registrator to instantiate
authorizer, authenticator, and role manager.

This patch switches to instantiating auth service via the constructor
that accepts factory functors. This is a step towards removing
usage of class registrator.

Refs SCYLLADB-409
2026-03-03 22:31:35 +01:00
Dawid Mędrek
7fd083e329 test: raft: Introduce get_default_cluster
We introduce a function creating a Raft cluster with parameters usually
used by the tests. This will avoid code duplication, especially after
introducing new tests in the following commits.

Note that the test `test_aborting_wait_for_state_change` has changed:
the previous complex configuration was unnecessary for it (I wrote it).
2026-03-03 18:50:21 +01:00
Pavel Emelyanov
b768753c0f test: Remove passing default "expected_replicas" to check_mutation_replicas()
The value of None is default, callers don't need to specify it
explicitly

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2026-03-03 17:28:21 +03:00
Pavel Emelyanov
b8ae9ede63 test: Remove scope and primary-replica-only arguments from check_mutation_replicas() helper
These two are only used to print into logs on error. However, their
values can be found from previous logs and test execution context.

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2026-03-03 17:26:25 +03:00
Karol Nowacki
45477d9c6b vector_search: test: include ANN error in assertion
When the test fails, the assertion message does not include
the error from the ANN request.

This change enhances the assertion to include the specific ANN error,
making it easier to diagnose test failures.
2026-03-03 14:19:20 +01:00
Karol Nowacki
ab6c222fc4 vector_search: test: fix HTTPS client test flakiness
The default 100ms timeout for client readiness in tests is too
aggressive. In some test environments, this is not enough time for
client creation, which involves address resolution and TLS certificate
reading, leading to flaky tests.

This commit increases the default client creation timeout to 10 seconds.
This makes the tests more robust, especially in slower execution
environments, and prevents similar flakiness in other test cases.

Fixes: VECTOR-547, SCYLLADB-802
2026-03-03 14:19:20 +01:00
Botond Dénes
7c2c63ab43 tombstone_gc: tombstone_gc_before_getter: consider RF when getting gc before time
Currently we cannot use repair-mode tombstone gc on RF=1 tables, because
such tables don't need repair and so there won't be repair history to
use to produce gc_before times.
Introduce shared_tombstone_gc_state::_rf_one_tables which will keep a
registry of RF=1 tables. Keeping this up to date is left to outside code
(table.cc). Consult the registry to determine whether a table is RF=1 or
not, so the repair history check can be ellided for rf=1 tables.
Not wired in yet into the table code.
2026-03-03 14:09:28 +02:00
Botond Dénes
a785c0cf41 test/lib/random_schema: use timeout-mode tombstone_gc
This is the current de-facto default for all tests using random schema
and some are apparently relying on this. Make this explicit to avoid
upsetting tests, by the impending change of this default to repair.
2026-03-03 14:09:28 +02:00
Botond Dénes
6004e84f18 test: move away from tombstone_gc_state(nullptr) ctor
Use for_tests() instead (or no_gc() where approriate).
2026-03-03 14:09:28 +02:00
Botond Dénes
3c34598d88 treewide: move away from tombstone_gc_state(nullptr) ctor
It is ambigous, use the appropriate no-gc or gc-all factories instead,
as appropriate.
A special note for mutation::compacted(): according to the comment above
it, it doesn't drop expired tombstones but as it is currently, it
actually does. Change the tombstone gc param for the underlying call to
compact_for_compaction() to uphold the comment. This is used in tests
mostly, so no fallout expected.

Tests are handled in the next commit, to reduce noise.

Two tests in mutation_test.cc have to be updated:

* test_compactor_range_tombstone_spanning_many_pages
  has to be updated in this commit, as it uses
  mutation_partition::compact_for_query() as well as
  compact_for_query(). The test passes default constructed
  tombstone_gc() to the latter while the former now uses no-gc
  creating a mismatch in tombstone gc behaviour, resulting in test
  failure. Update the test to also pass no-gc to compact_for_query().

* test_query_digest similarly uses mutation_partition::query_mutation()
  and another compaction method, having to match the no-gc now used in
  query_mutation().
2026-03-03 14:09:28 +02:00
Botond Dénes
6364e35403 replica/table: add get_tombstone_gc_state()
Shorthand for
get_compaction_manager().get_shared_tombstone_gc_state().get_tombstone_gc_state().
2026-03-03 14:09:28 +02:00
Botond Dénes
f3ee6a0bd1 compaction: use tombstone_gc_state with value semantics
Instead of passing around references to it, pass around values.

This object is now designed to be used as a value-type, after recent
refactoring.
2026-03-03 14:09:27 +02:00
Botond Dénes
83e20d920e db/row_cache: use tombstone_gc_state with value semantics
Instead of keeping a pointer to it. Replace nullptr with
tombstone_gc_state::no_gc().

This object is now designed to be used as a value-type, after recent
refactoring.
2026-03-03 14:09:27 +02:00
Artsiom Mishuta
5c84a76b28 test.py: setup pytest logger
This commit introduces pure pytest logging into a file

Previously, test.py used pytest as a script(not a framework) and just captured pytest stdout and logged this data by itself

This commit sets up the log files format that additionaly display Python processName, threadName adn taskName because test.py test cases use them, and now it is so hard to investigate issues that are connected with parallelism inside test case themselve

In addition, commit splits the logging of different pytest workers(xdist) into different files. If pytest workers have ho failed test - log file for these workers will be deleted

There is also additional logging for failures that will contain a separate file per test failure and contain the error itself (stacktrace) and all capture logs from stdout, stderr during the test run. With --save-log-on-success it will be a separate file per test on pass as well

All this new functionality works with the new xdit scheduler (--test-py-init=True)

Fixes SCYLLADB-713

Closes scylladb/scylladb#28705
2026-03-03 11:49:01 +01:00
Dimitrios Symonidis
80b74d7df2 tablet options: Add max_tablet_count tablet option to enforce tablet count upper bounds
Introduced a new max_tablet_count tablet option that caps the maximum number of tablets a table can have. This feature is designed primarily for backup and restore workflows.
During backup, when load balancing is disabled for snapshot consistency, the current tablet count is recorded in the backup manifest.
During restore, max_tablet_count is set to this recorded value, ensuring the restored table's tablet count never exceeds the original snapshot's tablet distribution.
This guarantee enables efficient file-based SSTable streaming during restore, as each SSTable remains fully contained within a single tablet boundary.

Closes scylladb/scylladb#28450
2026-03-03 11:19:24 +03:00
Karol Nowacki
30487e8854 index: fix vector index with filtering target column
The secondary index mechanism is currently used to determine the target column.
This mechanism works incorrectly for vector indexes with filtering because
it returns the last specified column as the target (vectors) column.
However, the syntax for a vector index requires the first column to be the target:
```
CREATE CUSTOM INDEX ON t(vectors, users) USING 'vector_index';
```

This discrepancy eventually leads to the following exception when performing an
ANN search on a vector index with filtering columns:
````
ANN ordering by vector requires the column to be indexed using 'vector_index'
````

This commit fixes the issue by introducing dedicated logic for vector indexes
to correctly identify the target(vectors) column.

Fixes: SCYLLADB-635

Closes scylladb/scylladb#28740
2026-03-02 18:47:58 +02:00
Botond Dénes
ab532882db tools/scylla-sstable: introduce scylla sstable split
Split input sstable(s) into multiple output sstables based on the provided
token boundaries. The input sstable(s) are divided according to the specified
split tokens, creating one output sstable per token range.

Fixes: SCYLLADB-10

Closes scylladb/scylladb#28741
2026-03-02 15:19:17 +01:00
Marcin Maliszkiewicz
d95939d69a test: add more logs to test_startup_no_auth_response
When test fails with assert connections_observed
we would like to know if it was unable to connect
or execute query in attempt_good_connection
2026-03-02 14:53:46 +01:00
Marcin Maliszkiewicz
91126eb2fb test: decrease strain in test_startup_response
For 2025.3 and 2025.4 this test runs order of magnitude
slower in debug mode. Potentially due to passwords::check
running in alien thread and overwhelming the CPU (this is
fixed in newer versions).

Decreasing the number of connections in test makes it fast
again, without breaking reproducibility.

As additional measure we double the timeout.

The fix is now cherry-picked to master as sometimes
test fails there too.

(cherry picked from commit 1f1fc2c2ac)
2026-03-02 14:46:51 +01:00
Marcin Maliszkiewicz
6bf706ef1b Merge 'scylla-sstable: query: handle nested UDTs' from Botond Dénes
The query (and in certain modes the write) operations uses virtual table facility inside `cql_test_env`. The schema of the sstable is created as a table in `cql_test_env`. This involves registering all UDTs with the keyspace, so they are available for lookups.
This was done with a flat loop over all column types, but this is not enough. UDTs might be nested in other types, like collections. One has to do a traversal of the type tree and register every UDT on the way.
This PR changes the flat loop to a recursive traversal of the type tree. The query operation now works with UDTs, no matter how deeply nested they are.

Backport: Implements missing functionality of a tool, no backport.

Closes scylladb/scylladb#28798

* github.com:scylladb/scylladb:
  tools/scylla-sstable: create_table_in_cql_env(): register UDTs recursively
  tools/scylla-sstable: generalize dump_if_user_type
  tools/scylla-sstable: move dump_if_user_type() definition
2026-03-02 14:14:43 +01:00
Karol Nowacki
647172d4b8 vector_search: fix names of private members
According to coding style in Scylla,
member variables are prefixed with underscore.
2026-03-02 14:08:16 +01:00
Marcin Maliszkiewicz
a83ee6cf66 Merge 'db/batchlog_manager: re-add v1 support for mixed clusters' from Botond Dénes
3f7ee3ce5d introduced system.batchlog_v2, with a schema designed to speed up batchlog replays and make post-replay cleanups much more effective.
It did not introduce a cluster feature for the new table, because it is node local table, so the cluster can switch to the new table gradually, one node at a time.
However, https://github.com/scylladb/scylladb/issues/27886 showed that the switching causes timeouts during upgrades, in mixed clusters. Furthermore, switching to the new table unconditionally  on upgrades nodes, means that on rollback, the batches saved into the v2 table are lost.
This PR introduces re-introduces v1 (`system.batchlog`) support and guards the use of the v2 table with a cluster feature, so mixed clusters keep using v1 and thus be rollback-compatible.
The re-introduced v1 support doesn't support post-replay cleanups for simplicity. The cleanup in v1 was never particularly effective anyway and we ended up disabling it for heavy batchlog users, so I don't think the lack of support for cleanup is a problem.

Fixes: https://github.com/scylladb/scylladb/issues/27886

Needs backport to 2026.1, to fix upgrades for clusters using batches

Closes scylladb/scylladb#28736

* github.com:scylladb/scylladb:
  test/boost/batchlog_manager_test: add tests for v1 batchlog
  test/boost/batchlog_manager_test: make prepare_batches() work with both v1 and v2
  test/boost/batchlog_manager_test: fix indentation
  test/boost/batchlog_manager_test: extract prepare_batches() method
  test/lib/cql_assertions: is_rows(): add dump parameter
  tools/scylla-sstable: extract query result printers
  tools/scylla-sstable: add std::ostream& arg to query result printers
  repair/row_level: repair_flush_hints_batchlog_handler(): add all_replayed to finish log
  db/batchlog_manager: re-add v1 support
  db/batchlog_manager: return all_replayed from process_batch()
  db/batchlog_manager: process_bath() fix indentation
  db/batchlog_manager: make batch() a standalone function
  db/batchlog_manager: make structs stats public
  db/batchlog_manager: allocate limiter on the stack
  db/batchlog_manager: add feature_service dependency
  gms/feature_service: add batchlog_v2 feature
2026-03-02 12:09:10 +01:00
Patryk Jędrzejczak
ba7f314cdc test: test_full_shutdown_during_replace: retry replace after the replacing node is removed from gossip
The test is currently flaky with `reuse_ip = True`. The issue is that the
test retries replace before the first replace is rolled back and the
first replacing node is removed from gossip. The second replacing node
can see the entry of the first replacing node in gossip. This entry has
a newer generation than the entry of the node being replaced, and both
replacing nodes have the same IP as the node being replaced. Therefore,
the second replacing node incorrectly considers this entry as the entry
of the node being replaced. This entry is missing rack and DC, so the
second replace fails with
```
ERROR 2026-02-24 21:19:03,420 [shard 0:main] init - Startup failed:
std::runtime_error (Cannot replace node
8762a9d2-3b30-4e66-83a1-98d16c5dd007/127.61.127.1 with a node on
a different data center or rack.
Current location=UNKNOWN_DC/UNKNOWN_RACK, new location=dc1/rack2)
```

Fixes SCYLLADB-805

Closes scylladb/scylladb#28829
2026-03-02 10:26:57 +02:00
Michael Litvak
8c4bc33e51 test: remove test_view_building_with_tablet_move
remove the test since it's not relevant anymore, it's not testing what
it's supposed to test and it's unstable.

the purpose of the test was to reproduce an issue in the legacy view
builder where a view starts to build at token T2 and then all tokens
[T1, end) with T1<T2 migrate to another node while it's still building,
exposing an issue when the view builder wraparounds the token ring.

this is not relevant anymore because now view building with tablets is
done via the view building coordinator for tablets, and all views start
to build from the first token with no wraparound.

besides, the test is unstable due to relying too much on specific
timing, which was useful for investigating and fixing the original issue
but not anymore.

Fixes SCYLLADB-842

Closes scylladb/scylladb#28842
2026-03-02 07:42:08 +01:00
Marcin Maliszkiewicz
8c2da76fde test/cqlpy: remove xfail from test_constant_function_parameter
The issue was fixed by commit cc03f5c89d
("cql3: support literals and bind variables in selectors"), so the
xfail marker is no longer needed.

Closes scylladb/scylladb#28776
2026-03-01 20:03:42 +02:00
Botond Dénes
1f09fcfb26 Merge 'Use standard ks/cf/data creation methods in test_restore_with_streaming_scopes' from Pavel Emelyanov
The test uses create_dataset helper duplicating the existing code that does the same. This PR patches basic tests to use standard facilities.

Also the PR simplifies the 3-level nested loops used to combine several sets of restoration parameters by using itertools.product facility.

Continuation of #28600.

Cleaning tests, not backporting

Closes scylladb/scylladb#28608

* github.com:scylladb/scylladb:
  test/object_store: Use itertools.product() for deeply nested loops
  test/object_store: Replace dataset creation usage with standard methods
  test/object_store: Shift indentation right for test_restore_with_streaming_scopes
2026-02-27 16:15:55 +02:00
Avi Kivity
450a09b152 test: tools: restrict embedded perf tests from taking over host
The perf-simple-query tests were not restricted on CPU count,
so on a 96-CPU machine, they would run on 96 CPUs, and time out
in debug mode.

All restrict memory usage and add --overprovisioned so that
pinning is disabled. Apply that to all tests.

Closes scylladb/scylladb#28821
2026-02-27 16:06:22 +02:00
Botond Dénes
d3a3921487 Merge 'Re-use and improve the take_snapshot() helper in backup tests' from Pavel Emelyanov
The helper is very simple yet generic -- it takes a snapshot of a keyspace on all servers and collects the resulting sstables from workdirs. Re-using it in all test cases saves some lines of code. Also, the method is "sequential", making it "parallel" reduces the waiting time a bit.

Will help generalizing existing backup/restore tests to support clustered snapshot/backup/restore API (see #28525) later.

Cleaning up tests, not backporting.

Closes scylladb/scylladb#28660

* github.com:scylladb/scylladb:
  test/backup: Run keyspace flush and snapshot taking API in parallel
  test/backup: Re-use take_snapshot() helper in do_abort_restore()
  test/backup: Move take_snapshot() helper up
2026-02-27 15:58:18 +02:00
Patryk Jędrzejczak
9a9202c909 Merge 'Remove gossiper topology code' from Gleb Natapov
The PR removes most of the code that assumes that group0 and raft topology is not enabled. It also makes sure that joining a cluster in no raft mode or upgrading a node in a cluster that not yet uses raft topology to this version will fail.

Refs #15422

No backport needed since this removes functionality.

Closes scylladb/scylladb#28514

* https://github.com/scylladb/scylladb:
  group0: fix indentation after previous patch
  raft_group0: simplify get_group0_upgrade_state function since no upgrade can happen any more
  raft_group0: move service::group0_upgrade_state to use fmt::formatter instead of iostream
  raft_group0: remove unused code from raft_group0
  node_ops: remove topology over node ops code
  topology: fix indentation after the previous patch
  topology: drop topology_change_enabled parameter from raft_group0 code
  storage_service: remove unused handle_state_* functions
  gossiper: drop wait_for_gossip_to_settle and deprecate correspondent option
  storage_service: fix indentation after the last patch
  storage_service: remove gossiper bootstrapping code
  storage_service: drop get_group_server_if_raft_topolgy_enabled
  storage_service: drop is_topology_coordinator_enabled and its uses
  storage_service: drop run_with_api_lock_in_gossiper_mode_only
  topology: remove code that assumes raft_topology_change_enabled() may return false
  test: schema_change_test: make test_schema_digest_does_not_change_with_disabled_features tests run in raft mode
  test: schema_change_test: drop schema tests relevant for no raft mode only
  topology: remove upgrade to raft topology code
  group0: remove upgrade to group0 code
  group0: refuse to boot if a cluster is still is not in a raft topology mode
  storage_service: refuse to join a cluster in legacy mode
2026-02-27 14:43:41 +01:00
Botond Dénes
9521a51e4c Merge 'generic_server: scale connection concurrency semaphore by listener count' from Marcin Maliszkiewicz
The concurrency semaphore gates uninitialized connections across all
do_accepts loops, but was initialized to a fixed value regardless of
how many listeners exist. With multiple listeners competing for the
same units, each effectively gets less than the configured concurrency.

Initialize the semaphore to concurrency - 1 and signal 1 per listen()
call, so total capacity is concurrency - 1 + nr_listeners. This
guarantees each listener's accept loop can have at least one unit
available.

It mainly fixes problem when setting uninitialized_connections_semaphore_cpu_concurrency
config value to 1 would result in not being able to process connections, as only 1 out of 2
listeners got the semaphore.

Fixes https://scylladb.atlassian.net/browse/SCYLLADB-762
Backport: no, it's a minor problem

Closes scylladb/scylladb#28747

* github.com:scylladb/scylladb:
  test: add test_uninitialized_conns_semaphore
  generic_server: fix waiters count in shed log
  generic_server: scale connection concurrency semaphore by listener count
2026-02-27 15:06:50 +02:00
Taras Veretilnyk
5bbc44ed12 sstables: replace rewrite_statistics with new rewrite component mechanism
This commits migrates all callers that used rewrite_statistics to new
rewrite component mechanism.
2026-02-26 22:38:55 +01:00
Taras Veretilnyk
51c345aaf6 sstables: add new rewrite component mechanism for safe sstable component rewriting
Previously, rewriting an sstable component (e.g., via rewrite_statistics) created a temporary file that was renamed
to the final name after sealing. This allows crash recovery by simply removing the temporary file on startup.

However, this approach won't work once component digests are stored in scylla_metadata,
as replacing a component like Statistics will require atomically updating both the component
and scylla_metadata with the new digest—impossible with POSIX rename.

The new mechanism creates a clone sstable with a fresh generation:
- Hard-links all components from the source except the component being rewritten and scylla metadata if update_sstable_id is true
- Copies original sstable components pointer and recognized components from the source
- Invokes a modifier callback to adjust the new sstable before rewriting
- Writes the modified component. If update_sstable_id is true, reads scylla metadata, generates new sstable_id and rewrites it.
- Seals the new sstable with a temporary TOC
- Replaces the old sstable atomically, the same way as it is done in compaction

This is built on the rewrite_sstables compaction framework to support batch operations (e.g., following incremental repair).
In case of any failure during the whole process, sstable will be automatically deleted on the node startup due to
temporary toc persistence.

This prepares the infrastructure for component digests. Once digests are introduced in scylla_metadata
this mechanism will be extended to also rewrite scylla metadata with the updated digest alongside the modified component, ensuring atomic updates of both.
2026-02-26 22:38:55 +01:00
Taras Veretilnyk
4aa0a3acf9 compaction: add compaction_group_view method to specify sstable version
Add make_sstable() overload that accepts sstable_version_types parameter
to compaction_group_view interface and all implementations.
This will be useful in rewrite component mechanism, as we
need to preserve sstable version when creating the new one for the replacement.
2026-02-26 22:38:55 +01:00
Łukasz Paszkowski
bb57b0f3b7 compaction_manager: fix maybe_wait_for_sstable_count_reduction() hanging forever
The futurization refactoring in 9d3755f276 ("replica: Futurize
retrieval of sstable sets in compaction_group_view") changed
maybe_wait_for_sstable_count_reduction() from a single predicated
wait:
```
    co_await cstate.compaction_done.wait([..] {
        return num_runs_for_compaction() <= threshold
            || !can_perform_regular_compaction(t);
    });
```
to a while loop with a predicated wait:
```
    while (can_perform_regular_compaction(t)
           && co_await num_runs_for_compaction() > threshold) {
        co_await cstate.compaction_done.wait([this, &t] {
            return !can_perform_regular_compaction(t);
        });
    }
```

This was necessary because num_runs_for_compaction() became a
coroutine (returns future<size_t>) and can no longer be called
inside a condition_variable predicate (which must be synchronous).

However, the inner wait's predicate — !can_perform_regular_compaction(t)
— only returns true when compaction is disabled or the table is being
removed. During normal operation, every signal() from compaction_done
wakes the waiter, the predicate returns false, and the waiter
immediately goes back to sleep without ever re-checking the outer
while loop's num_runs_for_compaction() condition.

This causes memtable flushes to hang forever in
maybe_wait_for_sstable_count_reduction() whenever the sstable run
count exceeds the threshold, because completed compactions signal
compaction_done but the signal is swallowed by the predicate.

Fix by replacing the predicated wait with a bare wait(), so that
any signal (including from completed compactions) causes the outer
while loop to re-evaluate num_runs_for_compaction().

Fixes: https://scylladb.atlassian.net/browse/SCYLLADB-610

Closes scylladb/scylladb#28801
2026-02-26 20:13:50 +02:00
Marcin Maliszkiewicz
a03ebe1a29 Merge 'cql: implement a new per-row TTL feature' from Nadav Har'El
This series implements a new per-row TTL feature for CQL. The per-row TTL feature was requested in issue #13000. It is a feature that does not exist in Cassandra, and was inspired by DynamoDB's TTL feature - and under the hood uses the same implementation that we used in Alternator to implement this DynamoDB feature.

The new per-row TTL feature is completely separate from CQL's existing per-write (and per-cell) TTL, and both will be available to users.

In the per-row TTL feature, one column in the table is designated as the "TTL" column, and its value for a row is the expiration time for that row. The TTL column can be designated at table creation time, e.g.:

```cql
CREATE TABLE tab (
    id int PRIMARY KEY,
    t text,
    expiration timestamp TTL
);
```

Or after the table already exists with:

```cql
ALTER TABLE tab TTL expiration
```

Expiration can also be disabled, with:

```cql
ALTER TABLE tab TTL NULL
```

The new per-row TTL feature has two features that users have been asking for:

1. A user can change the value of just the TTL column - without rewriting the entire row - to change the expiration time of the entire row.
2. When an expired row is finally deleted, a CDC event about this deletion appears in the CDC log (if CDC is enabled), including - if a preimage is enabled - the content of the deleted row.

To achieve the second goal (CDC events), a row is not guaranteed to disappear at exactly its expiration time (as CQL's original TTL feature guarantees). Rather, the row is deleted some time later, depending on `alternator_ttl_period_in_seconds`; Until the actual deletion, the row is still readable (and even writable). But we are guaranteed that when the row is finally deleted, the CDC event will come too.

The implementation uses the same background thread used by Alternator to periodically scan for expired items and delete them.

The expiration thread keeps the same metrics as it did for Alternator:
* `scylla_expiration_scan_passes`
* `scylla_expiration_scan_table`
* `scylla_expiration_items_deleted`
* `scylla_expiration_secondary_ranges_scanned`

The series begins with a few small preparation patches, followed by the main part of the feature (which isn't big, since we are just enabling the pre-existing Alternator expiration machinary for CQL) and finally 30 tests (single-node and multi-node tests) and documentation.

This series is a new feature, so traditionally would not be backported. However, I wouldn't be surprised if we will be requested to backport it so that customers will not need to wait for a new major release.

Fixes #13000

Closes scylladb/scylladb#28320

* github.com:scylladb/scylladb:
  test/cqlpy: verify that a column can't be both STATIC and PRIMARY KEY
  docs/cql: document the new CQL per-row TTL feature
  test/cluster: tests for the new CQL per-row TTL feature
  test/cqlpy: tests for the new CQL per-row TTL feature
  test: set low alternator_ttl_period_in_seconds in CQL tests
  cql ttl: fix ALTER TABLE to disable TTL if column is dropped
  cql ttl: add setting/unsetting of TTL column to ALTER TABLE
  cql ttl: add TTL column support to CREATE TABLE and DESC TABLE
  ttl: add CQL support to Alternator's TTL expiration service
  alternator ttl: move TTL_TAG_KEY to a header file
  alternator ttl: remove unnecessary check of feature flag
  cql: add "cql_row_ttl" cluster feature
  alternator: fix error message if UpdateTimeToLive is not supported
2026-02-26 15:29:12 +01:00
Yaniv Michael Kaul
ead9961783 cql: vector: fix vector dimension type
Switch vector dimension handling to fixed-width `uint32_t` type,
update parsing/validation, and add boundary tests.

The dimension is parsed as `unsigned long` at first which is guaranteed
to be **at least** 32-bit long, which is safe to downcast to `uint32_t`.

Move `MAX_VECTOR_DIMENSION` from `cql3_type::raw_vector` to `cql3_type`
to ensure public visibility for checks outside the class.

Add tests to verify the type boundaries.

Fixes: https://scylladb.atlassian.net/browse/SCYLLADB-223

Signed-off-by: Yaniv Kaul <yaniv.kaul@scylladb.com>
Co-authored-by: Dawid Pawlik <dawid.pawlik@scylladb.com>

Closes scylladb/scylladb#28762
2026-02-26 14:46:53 +02:00
Michael Litvak
4a60ee28a2 test/cqlpy/test_materialized_view.py: increase view build timeout
The test test_build_view_with_large_row creates a materialized view and
expects the view to be built with a timeout of 5 seconds. It was
observed to fail because the timeout is too short on slow machines.

Increase the timeout to 60 seconds to make the test less flaky on slow
machines. Similarly for the other tests in the file that have a timeout
for view build, increase the timeout to 60 seconds to be consistent and
safer.

Fixes SCYLLADB-769

Closes scylladb/scylladb#28817
2026-02-26 11:27:51 +02:00
Marcin Maliszkiewicz
30f18a91fd Merge 'dtest: wait_for speedup' from Dario Mirovic
Audit tests have been slow. They rely on wait_for function. This function first sleeps for the duration of the time step specified, and then calls the given function. The audit tests need 0.02-0.03 seconds for the given function, but the operation lasts around 1.02-1.03 seconds, since step is 1 second.

This patch modifies wait_for dtest function so it first executes the given function, and afterwards calls time.sleep(step). This reduces time needed for the given function from 1.03 to 0.03 seconds.

Total audit tests suite speedup is 3x. On the developer machine the time is reduced from 13+ minutes to 4 minutes.

This patch also improves performance of some alternator tests that use the same wait_for dtest function.

`wait_for` in dtest framework has default time step reduced to make the environment more responsive and test execution faster.

Refs SCYLLADB-573

This is a performance improvement of testing framework. No need to backport.

Closes scylladb/scylladb#28590

* github.com:scylladb/scylladb:
  dtest: shorten default sleep step in wait_for
  dtest: wait_for speedup
2026-02-26 09:33:38 +01:00
Amnon Heiman
5db971c2f9 estimated_histogram_test.cc: add to_metrics_histogram test
Add a test that exercises to_metrics_histogram when Min is smaller than
Precision.

The test verifies duplicate integer bounds are collapsed,
counts remain cumulative, and native histogram metadata is still present
with the expected schema and min id.

Signed-off-by: Amnon Heiman <amnon@scylladb.com>
2026-02-26 09:00:52 +02:00
Amnon Heiman
af6371c11f estimated_histogram_test.cc: Add tests for approx_exponential_histogram with Min<Precision
Add three test cases to verify the hybrid linear/exponential bucketing:
- test_histogram_min_1_bucket_limits: Validates bucket lower limits
- test_histogram_min_1_basic: Tests value insertion and bucket distribution
- test_histogram_min_1_statistics: Tests min(), max(), quantile(), and mean()
- test_histogram_min_2_precision_4: Test min == 2 and precision 4.

These tests cover the new Min<Precision mode with Precision=4, verifying both the
linear range and exponential range.

Signed-off-by: Amnon Heiman <amnon@scylladb.com>
2026-02-26 08:53:06 +02:00
Amnon Heiman
aca5284b13 test(alternator): add per-table latency coverage for item and batch ops
Add missing tests for per-table Alternator latency metrics to ensure recent
per-table latency accounting is actually validated.

Changes in this patch:

Refactor latency assertion helper into check_sets_latency_by_metric(),
parameterized by metric name.
Keep existing behavior by implementing check_sets_latency() as a wrapper
over scylla_alternator_op_latency.
Add test_item_latency_per_table() to verify
scylla_alternator_table_op_latency_count increases for:
PutItem, GetItem, DeleteItem, UpdateItem, BatchWriteItem,
and BatchGetItem.
This closes a test gap where only global latency metrics were checked, while
per-table latency metrics were not covered.

Signed-off-by: Amnon Heiman <amnon@scylladb.com>
2026-02-25 20:51:18 +02:00
Nadav Har'El
1d265e7d6d test/cqlpy: verify that a column can't be both STATIC and PRIMARY KEY
While adding the new syntax "TTL" to CREATE TABLE, I noticed that the
parser actually allows a column to be defined as "STATIC PRIMARY KEY".

So I add here a small test to verify that this is not really allowed:
The syntax "c int STATIC PRIMARY KEY" is accepted, but then rejected
by a later check. The syntax "c int PRIMARY KEY STATIC" is rejected
as a syntax error.

Signed-off-by: Nadav Har'El <nyh@scylladb.com>
2026-02-25 14:59:45 +02:00
Nadav Har'El
23ad0be034 test/cluster: tests for the new CQL per-row TTL feature
The previous patch added single-node functional tests (in test/cqlpy)
for everything which was possible to test on a single node. In this
patch we add four tests that we couldn't test on a single node, using
the test/cluster test framework:

1. Test that the TTL expiration work - both the scanning threads and
   the actual deletion work on all nodes - happens on the "streaming"
   scheduling group.

2. Test that even if one of the cluster's nodes is down, still all
   the items get expired - another node "takes over" the dead node's
   work.

3. Test that rolling upgrade works as designed for the CQL per-row TTL
   feature: Before every single node in the cluster is upgraded to
   support this feature, a TTL column cannot be enabled on a table.
   And as soon as the last node of the cluster is upgraded, the TTL
   feature begins to work completely (you don't need to reboot all
   the nodes again).

4. Test that expiration works correctly on a multi-DC setup. The test
   doesn't check the efficiency of this process - i.e., that today each
   DC scans part of the data, reading with LOCAL_QUORUM, and writing
   the deletions across the entire cluster. Rather, the test only
   verifies the correctness - that expired rows do get deleted -
   for the usual case the data across the DCs is consistent.

Signed-off-by: Nadav Har'El <nyh@scylladb.com>
2026-02-25 14:59:44 +02:00