The same issue as the one fixed in
394207fd69.
This one didn't cause real problems, but it's still cleaner to fix it.
(cherry picked from commit 7e7b9977c5)
We extend the test to provide a reproducer for #27988 and to avoid
similar bugs in the future.
The test slows down from ~14s to ~19s on my local machine in dev
mode. It seems reasonable.
(cherry picked from commit 867a1ca346)
In the following commit, we make the rest run with multiple keyspaces,
and the old check becomes inconvenient. We also move it below to the
part of the code that won't be executed for each keyspace.
Additionally, we check if the error message is as expected.
(cherry picked from commit 53f58b85b7)
This skip has already caused trouble.
After 0668c642a2, the skip was always hit, and
the test was silently doing nothing. This made us miss #26816 for a long
time. The test was fixed in 222eab45f8, but we
should get rid of the skip anyway.
We increase the number of writes from 256 to 1000 to make the chance of not
finding the key on server A even lower. If that still happens, it must be
due to a bug, so we fail the test. We also make the test insert rows until
server A is a replica of one row. The expected number of inserted rows is
a small constant, so it should, in theory, make the test faster and cleaner
(we need one row on server A, so we insert exactly one such row).
It's possible to make the test fully deterministic, by e.g., hardcoding
the key and tokens of all nodes via `initial_token`, but I'm afraid it would
make the test "too deterministic" and could hide a bug.
(cherry picked from commit 408c6ea3ee)
In PR 5b6570be52 we introduced the config option `sstable_compression_user_table_options` to allow adjusting the default compression settings for user tables. However, the new option was hooked into the CQL layer and applied only to CQL base tables, not to the whole spectrum of user tables: CQL auxiliary tables (materialized views, secondary indexes, CDC log tables), Alternator base tables, Alternator auxiliary tables (GSIs, LSIs, Streams).
This gap also led to inconsistent default compression algorithms after we changed the option’s default algorithm from LZ4 to LZ4WithDicts (adf9c426c2).
This series introduces a general “schema initializer” mechanism in `schema_builder` and uses it to apply the default compression settings uniformly across all user tables. This ensures that all base and aux tables take their default compression settings from config.
Fixes#26914.
Backport justification: LZ4WithDicts is the new default since 2025.4, but the config option exists since 2025.2. Based on severity, I suggest we backport only to 2025.4 to maintain consistency of the defaults.
- (cherry picked from commit 4ec7a064a9)
- (cherry picked from commit 76b2d0f961)
- (cherry picked from commit 5b4aa4b6a6)
- (cherry picked from commit d5ec66bc0c)
- (cherry picked from commit 1e37781d86)
- (cherry picked from commit 7fa1f87355)
Parent PR: #27204Closesscylladb/scylladb#28305
* github.com:scylladb/scylladb:
db/config: Update sstable_compression_user_table_options description
schema: Add initializer for compression defaults
schema: Generalize static configurators into schema initializers
schema: Initialize static properties eagerly
db: config: Add accessor for sstable_compression_user_table_options
test: Check that CQL and Alternator tables respect compression config
test/cqlpy: test compression setting for auxiliary table
test/alternator: tests for schema of Alternator table
Previously we only inspected std::system_error inside
std::nested_exception to support a specific TLS-related failure
mode. However, nested exceptions may contain any type, including
other restartable (retryable) errors. This change unwraps one
nested exception per iteration and re-applies all known handlers
until a match is found or the chain is exhausted.
Closesscylladb/scylladb#28240
(cherry picked from commit cb2aa85cf5)
Closesscylladb/scylladb#28344
Commit 0156e97560 ("storage_proxy: cas: reject for
tablets-enabled tables") marked a bunch of LWT tests as
XFAIL with tablets enabled, pending resolution of #18066.
But since that event is now in the past, we undo the XFAIL
markings (or in some cases, use an any-keyspace fixture
instead of a vnodes-only fixture).
Ref #18066.
Closesscylladb/scylladb#28336
(cherry picked from commit ec70cea2a1)
[avi: skip counters-with-tablets test as not supported in 2025.4]
Closesscylladb/scylladb#28364
The test is currently flaky. It tries to get the host ID of the bootstrapping
node via the REST API after the node crashes. This can obviously fail. The
test usually doesn't fail, though, as it relies on the host ID being saved
in `ScyllaServer._host_id` at this point by `ScyllaServer.try_get_host_id()`
repeatedly called in `ScyllaServer.start()`. However, with a very fast crash
and unlucky timings, no such call may succeed.
We deflake the test by getting the host ID before the crash. Note that at this
point, the bootstrapping node must be serving the REST API requests because
`await log.wait_for("finished do_send_ack2_msg")` above guarantees that the
node has started the gossip shadow round, which happens after starting the REST
API.
Fixes#28385Closesscylladb/scylladb#28388
(cherry picked from commit a2c1569e04)
Closesscylladb/scylladb#28416
In PR 5b6570be52 we introduced the config option
`sstable_compression_user_table_options` to allow adjusting the default
compression settings for user tables. However, the new option was hooked
into the CQL layer and applied only to CQL base tables, not to the whole
spectrum of user tables: CQL auxiliary tables (materialized views,
secondary indexes, CDC log tables), Alternator base tables, Alternator
auxiliary tables (GSIs, LSIs, Streams).
Fix this by moving the logic into the `schema_builder` via a schema
initializer. This ensures that the default compression settings are
applied uniformly regardless of how the table is created, while also
keeping the logic in a central place.
Register the initializer at startup in all executables where schemas are
being used (`scylla_main()`, `scylla_sstable_main()`, `cql_test_env`).
Finally, remove the ad-hoc logic from `create_table_statement`
(redundant as of this patch), remove the xfail markers from the relevant
tests and adjust `test_describe_cdc_log_table_create_statement` to
expect LZ4WithDicts as the default compressor.
Fixes#26914.
Signed-off-by: Nikos Dragazis <nikolaos.dragazis@scylladb.com>
(cherry picked from commit 1e37781d86)
Extend the `static_configurator` mechanism to support initialization of
arbitrary schema properties, not only static ones, by passing a
`schema_builder` reference to the configurator interface.
As part of this change, rename `static_configurator` to
`schema_initializer` to better reflect its broader responsibility.
Add a checkpoint/restore mechanism to allow de-registering an
initializer (useful for testing; will be used in the next patch).
Signed-off-by: Nikos Dragazis <nikolaos.dragazis@scylladb.com>
(cherry picked from commit d5ec66bc0c)
The `sstable_compression_user_table_options` config option determines
the default compression settings for user tables.
In patch 2fc812a1b9, the default value of this option was changed from
LZ4 to LZ4WithDicts and a fallback logic was introduced during startup
to temporarily revert the option to LZ4 until the dictionary compression
feature is enabled.
Replace this fallback logic with an accessor that returns the correct
settings depending on the feature flag. This is cleaner and more
consistent with the way we handle the `sstable_format` option, where the
same problem appears (see `get_preferred_sstable_version()`).
As a consequence, the configuration option must always be accessed
through this accessor. Add a comment to point this out.
Signed-off-by: Nikos Dragazis <nikolaos.dragazis@scylladb.com>
(cherry picked from commit 76b2d0f961)
In patches 11f6a25d44 and 7b9428d8d7 we added tests to verify that
auxiliary tables for both CQL and Alternator have the same default
compression settings as their base tables. These tests do not check
where these defaults originate from; they just verify that they are
consistent.
Add some more tests to verify the actual source of the defaults, which
is expected to be the `sstable_compression_user_table_options`
from the configuration. Unlike the previous tests, these tests require
dedicated Scylla instances with custom configuration, so they must be
placed under `test/cluster/`.
Mark them as xfail-ing. The marker will be removed later in this series.
Signed-off-by: Nikos Dragazis <nikolaos.dragazis@scylladb.com>
(cherry picked from commit 4ec7a064a9)
In the previous patch we noticed that although recently (commit adf9c42,
Refs #26610) we changed the default sstable compressor from LZ4Compressor
to LZ4WithDictsCompressor, this change was only applied to CQL, not to
Alternator.
In this patch we add tests that demonstrate that it's even worse - the
new compression only applies to CQL's *base* table - all the "auxiliary"
tables -
* Materialized views
* Secondary index's materialized views
* CDC log tables
all still have the old LZ4Compressor, different from the base table's
default compressor.
The new test fails on Scylla, reproducing #26914, and passes on
Cassandra (on Cassandra, we only compare the materialized view table,
because SI and CDC is implemented differently).
Signed-off-by: Nadav Har'El <nyh@scylladb.com>
(cherry picked from commit 7b9428d8d7)
This patch introduces a new test that exposed a previously unknown bug,
Refs #26914:
Recently we saw a lot of patches that change how we create new schemas
(keyspaces and tables), sometimes changing various long-time defaults.
We started to worry that perhaps some of these defaults were applied only
to CQL and not to Alternator. For example, in Refs #26307 we wondered if
perhaps the default "speculative_retry" option is different in Alternator
than in CQL.
This patch includes a new test file test/alternator/test_cql_schema.py,
with tests for verifying how Alternator configures the underlying tables
it creates. This test shows that the "speculative_retry" doesn't have
this suspected bug - it defaults to "99.0PERCENTILE" in both CQL and
Alternator. But unfortunately, we do have this bug with the "compression"
option:
It turns out that recently (commit adf9c42, Refs #26610) we changed the
default sstable compressor from LZ4Compressor to LZ4WithDictsCompressor,
but the change was only applied to CQL, not Alternator. So the test that
"compression" is the same in both fails - and marked "xfails" and
I created a new issue to track it - #26914.
Another test verifies that Alternators "auxiliary" tables - holding
GSIs, LSIs and Streams - have the same default properties as the base
table. This currently seems to hold (there is no bug).
Signed-off-by: Nadav Har'El <nyh@scylladb.com>
(cherry picked from commit 11f6a25d44)
storage_proxy::stop() is not called by main (it is commented out due to #293),
so the corresponding message injection is never hit. When the test releases
paxos_state_learn_after_mutate, shutdown may already be in progress or even
completed by the time we try to trigger the storage_proxy::stop injection,
which makes the test flaky.
Fix this by completely removing the storage_proxy::stop injection.
The injection is not required for test correctness. Shutdown must wait for the
background LWT learn to finish, which is released via the
paxos_state_learn_after_mutate injection.
The shutdown process blocks on in-flight api HTTP requests through
seastar::httpd::http_server::stop and its _task_gate, so the
shutdown will not prevent the HTTP request that released the
paxos_state_learn_after_mutate from completing successfully.
Fixesscylladb/scylladb#28260
(cherry picked from commit f5ed3e9fea)
The test is currently flaky. It incorrectly assumes that a read with
CL=LOCAL_ONE will see the data inserted by a preceding write with
CL=LOCAL_ONE in the same datacenter with RF=2.
The same issue has already been fixed for CL=ONE in
21edec1ace. The difference is that
for CL=LOCAL_ONE, only dc1 is problematic, as dc2 has RF=1.
We fix the issue for CL=LOCAL_ONE by skipping the check for dc1.
Fixes#28253
The fix addresses CI flakiness and only changes the test, so it
should be backported.
Closesscylladb/scylladb#28274
(cherry picked from commit 1f0f694c9e)
Closesscylladb/scylladb#28304
The test is currently flaky. It tries to get the host ID of the bootstrapping
node via the REST API after the node crashes. This can obviously fail. The
test usually doesn't fail, though, as it relies on the host ID being saved
in `ScyllaServer._host_id` at this point by `ScyllaServer.try_get_host_id()`
repeatedly called in `ScyllaServer.start()`. However, with a very fast crash
and unlucky timings, no such call may succeed.
We deflake the test by getting the host ID before the crash. Note that at this
point, the bootstrapping node must be serving the REST API requests because
`await coordinator_log.wait_for("delay_node_bootstrap: waiting for message")`
above guarantees that the node has submitted the join topology request, which
happens after starting the REST API.
Fixes#28227Closesscylladb/scylladb#28233
(cherry picked from commit e503340efc)
Closesscylladb/scylladb#28310
The API contract in partition_version.hh states that when dealing with
evictable entries, a real cache tracker pointer has to be passed to all
methods that ask for it. The nonpopulating reader violates this, passing
a nullptr to the snapshot. This was observed to cause a crash when a
concurrent cache read accessed the snapshot with the null tracker.
A reproducer is included which fails before and passes after the fix.
Fixes: #26847Closesscylladb/scylladb#28163
(cherry picked from commit a53f989d2f)
Closesscylladb/scylladb#28279
reader_permit::release_base_resources() is a soft evict for the permit:
it releases the resources aquired during admission. This is used in
cases where a single process owns multiple permits, creating a risk for
deadlock, like it is the case for repair. In this case,
release_base_resources() acts as a manual eviction mechanism to prevent
permits blockings each other from admission.
Recently we found a bad interaction between release_base_resources() and
permit eviction. Repair uses both mechanism: it marks its permits as
inactive and later it also uses release_base_resources(). This partice
might be worth reconsidering, but the fact remains that there is a bug
in the reader permit which causes the base resources to be released
twice when release_base_resources() is called on an already evicted
permit. This is incorrect and is fixed in this patch.
Improve release_base_resources():
* make _base_resources const
* move signal call into the if (_base_resources_consumed()) { }
* use reader_permit::impl::signal() instead of
reader_concurrency_semaphore::signal()
* all places where base resources are released now call
release_base_resources()
A reproducer unit test is added, which fails before and passes after the
fix.
Fixes: #28083Closesscylladb/scylladb#28155
(cherry picked from commit b7bc48e7b7)
Closesscylladb/scylladb#28245
Currently when a null vector is passed to an ANN query we fail with a
quite confusing error ("NoHostAvailable: ('Unable to complete the
operation against any hosts', {<Host: 127.0.0.1:9042 datacenter1>:
<Error from server: code=0000 [Server error] message="to_bytes() called
on raw value that is null">})").
This patch fixes that by throwing an InvalidRequestException with an
appropriate message instead.
We also add a test case that validates this behavior.
Fixes: VECTOR-257
Closesscylladb/scylladb#26510
(cherry picked from commit 541b52cdbf)
Closesscylladb/scylladb#28052
The loop that unwraps nested exception, rethrows nested exception and saves pointer to the temporary std::exception& inner on stack, then continues. This pointer is, thus, pointing to a released temporary
Closesscylladb/scylladb#28143
(cherry picked from commit 829bd9b598)
Closesscylladb/scylladb#28243
`test_schema_versioning_with_recovery` is currently flaky. It performs
a write with CL=ALL and then checks if the schema version is the same on
all nodes by calling `verify_table_versions_synced`. All nodes are expected
to sync their schema before handling the replica write. The node in
RECOVERY mode should do it through a schema pull, and other nodes should do
it through a group 0 read barrier.
The problem is in `verify_local_schema_versions_synced` that compares the
schema versions in `system.local`. The node in RECOVERY mode updates the
schema version in `system.local` after it acknowledges the replica write
as completed. Hence, the check can fail.
We fix the problem by making the function wait until the schema versions
match.
Note that RECOVERY mode is about to be retired together with the whole
gossip-based topology in 2026.2. So, this test is about to be deleted.
However, we still want to fix it, so that it doesn't bother us in older
branches.
Fixes#23803Closesscylladb/scylladb#28114
(cherry picked from commit 6b5923c64e)
Closesscylladb/scylladb#28178
A replaced node may have pending operation on it. The replace operation
will move the node into the 'left' state and the request will never be
completed. More over the code does not expect left node to have a
request. It will try to process the request and will crash because the
node for the request will not be found.
The patch checks is the replaced node has peening request and completes
it with failure. It also changes topology loading code to skip requests
for nodes that are in a left state. This is not strictly needed, but
makes the code more robust.
Fixes#27990Closesscylladb/scylladb#28009
(cherry picked from commit bee5f63cb6)
Closesscylladb/scylladb#28180
It was obseved:
```
test_repair_disjoint_row_2nodes_diff_shard_count was spuriously failing due to
segfault.
backtrace pointed to a failure when allocating an object from the chain of
freed objects, which indicates memory corruption.
(gdb) bt
at ./seastar/include/seastar/core/shared_ptr.hh:275
at ./seastar/include/seastar/core/shared_ptr.hh:430
Usual suspect is use-after-free, so ran the reproducer in the sanitize mode,
which indicated shared ptr was being copied into another cpu through the
multi shard writer:
seastar - shared_ptr accessed on non-owner cpu, at: ...
--------
seastar::smp_message_queue::async_work_item<mutation_writer::multishard_writer::make_shard_writer...
```
The multishard writer itself was fine, the problem was in the streaming consumer
for repair copying a shared ptr. It could work fine with same smp setting, since
there will be only 1 shard in the consumer path, from rpc handler all the way
to the consumer. But with mixed smp setting, the ptr would be copied into the
cpus involved, and since the shared ptr is not cpu safe, the refcount change
can go wrong, causing double free, use-after-free.
To fix, we pass a generic incremental repair handler to the streaming
consumer. The handler is safe to be copied to different shards. It will
be a no op if incremental repair is not enabled or on a different shard.
A reproducer test is added. The test could reproduce the crash
consistently before the fix and work well after the fix.
Fixes#27666Closesscylladb/scylladb#27870
(cherry picked from commit 0aabf51380)
Closesscylladb/scylladb#28064
This patch adds tablet repair progress report support so that the user
could use the /task_manager/task_status API to query the progress.
In order to support this, a new system table is introduced to record the
user request related info, i.e, start of the request and end of the
request.
The progress is accurate when tablet split or merge happens in the
middle of the request, since the tokens of the tablet are recorded when
the request is started and when repair of each tablet is finished. The
original tablet repair is considered as finished when the finished
ranges cover the original tablet token ranges.
After this patch, the /task_manager/task_status API will report correct
progress_total and progress_completed.
Fixes#22564Fixes#26896Closesscylladb/scylladb#27679
(cherry picked from commit 4f77dd058d)
Closesscylladb/scylladb#28065
The `make_key` lambda erroneously allocates a fixed 8-byte buffer
(`sizeof(s.size())`) for variable-length strings, potentially causing
uninitialized bytes to be included. If such bytes exist and they are
not valid UTF-8 characters, deserialization fails:
```
ERROR 2026-01-16 08:18:26,062 [shard 0:main] testlog - snapshot_list_contains_dropped_tables: cql env callback failed, error: exceptions::invalid_request_exception (Exception while binding column p1: marshaling error: Validation failed - non-UTF8 character in a UTF8 string, at byte offset 7)
```
Fixes#28195.
Signed-off-by: Nikos Dragazis <nikolaos.dragazis@scylladb.com>
Closesscylladb/scylladb#28197
(cherry picked from commit 8aca7b0eb9)
Closesscylladb/scylladb#28209
This is a follow-up of the previous fix: https://github.com/scylladb/scylladb/pull/26030
The test test_user_writes_rejection starts a 3-node cluster and
creates a large file on one of the nodes, to trigger the out-of-space
prevention mechanism, which should reject writes on that node.
It waits for the log message 'Setting critical disk utilization mode: true'
and then executes a write expecting the node to reject it.
Currently, the message is logged before the `_critical_disk_utilization`
variable is actually updated. This causes the test to fail sporadically
if it runs quickly enough.
The fix splits the logging into two steps:
1. "Asked to set critical disk utilization mode" - logged before any action
2) "Set critical disk utilization mode" - logged after `_critical_disk_utilization` has been updated
The tests are updated to wait for the second message.
Fixes https://github.com/scylladb/scylladb/issues/26004Closesscylladb/scylladb#26392
(cherry picked from commit 7ec369b900)
Closesscylladb/scylladb#26626
Fixes#26744
If a segment to replay is broken such that the main header is not zero, but still broken, we throw header_checksum_error. This was not handled in replayer, which grouped this into the "user error/fundamental problem" category.
However, assuming we allow for "real" disk corruption, this should really be treated same as data corruption, i.e. reported data loss, not failure to start up.
The `test_one_big_mutation_corrupted_on_startup` test accidentally sometimes provoked this issue, by doing random file wrecking, which on rare occasions provoked this, and thus failed test due to scylla not starting up, instead of losing data as expected.
- (cherry picked from commit 9b5f3d12a3)
- (cherry picked from commit e48170ca8e)
- (cherry picked from commit 8c4ac457af)
Parent PR: #27556Closesscylladb/scylladb#27682
* github.com:scylladb/scylladb:
test::cluster::dtest::tools::files: Remove file
commitlog_replay: Handle fully corrupt files same as partial corruption.
test::pylib::suite::base: Split options.name test specifier only once
Fixes#27992
When doing a commit log oversized allocation, we lock out all other writers by grabbing
the _request_controller semaphore fully (max capacity).
We thereafter assert that the semaphore is in fact zero. However, due to how things work
with the bookkeep here, the semaphore can in fact become negative (some paths will not
actually wait for the semaphore, because this could deadlock).
Thus, if, after we grab the semaphore and execution actually returns to us (task schedule),
new_buffer via segment::allocate is called (due to a non-fully-full segment), we might
in fact grab the segment overhead from zero, resulting in a negative semaphore.
The same problem applies later when we try to sanity check the return of our permits.
Fix is trivial, just accept less-than-zero values, and take same possible ltz-value
into account in exit check (returning units)
Added whitebox (special callback interface for sync) unit test that provokes/creates
the race condition explicitly (and reliably).
Closesscylladb/scylladb#27998
(cherry picked from commit a7cdb602e1)
Closesscylladb/scylladb#28099
VECTOR_SEARCH_INDEXING permission didn't work on cdc tables as we mistakenly checked for vector indexes on the cdc table insted of the base.
This patch fixes that and adds a test that validates this behavior.
Fixes: VECTOR-476
Closesscylladb/scylladb#28050
(cherry picked from commit e2e479f20d)
Closesscylladb/scylladb#28068
We currently do it only for a bootstrapping node, which is a bug. The
missing IP can cause an internal error, for example, in the following
scenario:
- replace fails during streaming,
- all live nodes are shut down before the rollback of replace completes,
- all live nodes are restarted,
- live nodes start hitting internal error in all operations that
require IP of the replacing node (like client requests or REST API
requests coming from nodetool).
We fix the bug here, but we do it separately for replace with different
IP and replace with the same IP.
For replace with different IP, we persist the IP -> host ID mapping
in `system.peers` just like for bootstrap. That's necessary, since there
is no other way to determine IP of the replacing node on restart.
For replace with the same IP, we can't do the same. This would require
deleting the row corresponding to the node being replaced from
`system.peers`. That's fine in theory, as that node is permanently
banned, so its IP shouldn't be needed. Unfortunately, we have many
places in the code where we assume that IP of a topology member is always
present in the address map or that a topology member is always present in
the gossiper endpoint set. Examples of such places:
- nodetool operations,
- REST API endpoints,
- `db::hints::manager::store_hint`,
- `group0_voter_handler::update_nodes`.
We could fix all those places and verify that drivers work properly when
they see a node in the token metadata, but not in `system.peers`.
However, that would be too risky to backport.
We take a different approach. We recover IP of the replacing node on
restart based on the state of the topology state machine and
`system.peers` just after loading `system.peers`.
We rely on the fact that group 0 is set up at this point. The only case
where this assumption is incorrect is a restart in the Raft-based
recovery procedure. However, hitting this problem then seems improbable,
and even if it happens, we can restart the node again after ensuring
that no client and REST API requests come before replace is rolled back
on the new topology coordinator. Hence, it's not worth to complicate the
fix (by e.g. looking at the persistent topology state instead of the
in-memory state machine).
Fixes#28057
Backport this PR to all branches as it fixes a problematic bug.
- (cherry picked from commit fc4c2df2ce)
- (cherry picked from commit 4526dd93b1)
- (cherry picked from commit 749b0278e5)
- (cherry picked from commit 0fed9f94f8)
Parent PR: #27435Closesscylladb/scylladb#28100
* https://github.com/scylladb/scylladb:
gossiper: add_saved_endpoint: make generations of excluded nodes negative
test: introduce test_full_shutdown_during_replace
utils: error_injection: allow aborting wait_for_message
raft topology: preserve IP -> ID mapping of a replacing node on restart
The explanation is in the new comment in `gossiper::add_saved_endpoint`.
We add a test for this change. It's "extremely white-box", but it's better
than nothing.
(cherry picked from commit 0fed9f94f8)
The current code:
```
try:
cql.execute(f"INSERT INTO {cf} (pk, t) VALUES (-1, 'x')", host=host[0], execution_profile=cl_one_profile).result()
except Exception:
pass
```
contains a typo: `host=host[0]` which throws an exception becase Host
object is not subscriptable. The test does not fail because the except
block is too broad and suppresses all exceptions.
Fixing the typo alone is insufficient. The write still succeeds because
the remaining nodes are UP and the query uses CL=ONE, so no failure
should be expected.
Another source of flakiness is data verification:
```
SELECT * FROM {cf} WHERE pk = 0;
```
Even when a coordinator is explicitly provided, using CL=ONE does not
guarantee a local read. The coordinator may forward the read request to
another replica, causing the verification to fail nondeterministically.
This patch rewrites the tests to address these issues:
- Fix the typo: `host[0]` to `hosts[0]`
- Verify data using `MUTATION_FRAGMENTS({cf})` which guarantees a local
read on the coordinator node
- Reconnect the driver after node restart
Fixes https://github.com/scylladb/scylladb/issues/27933Closesscylladb/scylladb#27934
(cherry picked from commit 7bf26ece4d)
Closesscylladb/scylladb#28094
Currently, database::truncate_table_on_all_shards calls the table::can_flush only on the coordinator shard
and therefore it may miss shards with dirty data if the coordinator shard happens to have empty memtables, leading to clearing the memtables with dirty data rather than flushing them.
This change fixes that by making flush safe to be called, even if the memtable list is empty, and calling it on every shard that can flush (i.e. seal_immediate_fn is engaged).
Also, change database_test::do_with_some_data is use random keys instead of hard-coded key names, to reproduce this issue with `snapshot_list_contains_dropped_tables`.
Fixes#27639
* The issue exists since forever and might cause data loss due to wrongly clearing the memtable, so it needs backport to all live versions
- (cherry picked from commit ec4069246d)
- (cherry picked from commit 5be6b80936)
- (cherry picked from commit 0342a24ee0)
- (cherry picked from commit 02ee341a03)
- (cherry picked from commit 2a803d2261)
- (cherry picked from commit 93b827c185)
- (cherry picked from commit ebd667a8e0)
Parent PR: #27643Closesscylladb/scylladb#28074
* https://github.com/scylladb/scylladb:
test: database_test: do_with_some_data: randomize keys
database: truncate_table_on_all_shards: drop outdated TODO comment
database: truncate_table_on_all_shards: consider can_flush on all shards
memtable_list: unify can_flush and may_flush
test: database_test: add test_flush_empty_table_waits_on_outstanding_flush
replica: table, storage_group, compaction_group: add needs_flush
test: database_test: do_with_some_data_in_thread: accept void callback function
Call discover_staging_sstables in view_update_generator::start() instead
of in the constructor, because the constructor is called during
initialization before sstables are loaded.
The initialization order was changed in 5d1f74b86a and caused this
regression. It means the view update generator won't discover staging
sstables on startup and view updates won't be generated for them. It
also causes issues in sstable cleanup.
view_update_generator::start() is called in a later stage of the
initialization, after sstable loading, so do the discovery of staging
sstables there.
Fixesscylladb/scylladb#27956
(cherry picked from commit 5077b69c06)
Closesscylladb/scylladb#28090
The driver must see server_c before we stop server_a, otherwise
there will be no live host in the pool when we attempt to drop
the keyspace:
```
@pytest.mark.asyncio
async def test_not_enough_token_owners(manager: ManagerClient):
"""
Test that:
- the first node in the cluster cannot be a zero-token node
- removenode and decommission of the only token owner fail in the presence of zero-token nodes
- removenode and decommission of a token owner fail in the presence of zero-token nodes if the number of token
owners would fall below the RF of some keyspace using tablets
"""
logging.info('Trying to add a zero-token server as the first server in the cluster')
await manager.server_add(config={'join_ring': False},
property_file={"dc": "dc1", "rack": "rz"},
expected_error='Cannot start the first node in the cluster as zero-token')
logging.info('Adding the first server')
server_a = await manager.server_add(property_file={"dc": "dc1", "rack": "r1"})
logging.info('Adding two zero-token servers')
# The second server is needed only to preserve the Raft majority.
server_b = (await manager.servers_add(2, config={'join_ring': False}, property_file={"dc": "dc1", "rack": "rz"}))[0]
logging.info(f'Trying to decommission the only token owner {server_a}')
await manager.decommission_node(server_a.server_id,
expected_error='Cannot decommission the last token-owning node in the cluster')
logging.info(f'Stopping {server_a}')
await manager.server_stop_gracefully(server_a.server_id)
logging.info(f'Trying to remove the only token owner {server_a} by {server_b}')
await manager.remove_node(server_b.server_id, server_a.server_id,
expected_error='cannot be removed because it is the last token-owning node in the cluster')
logging.info(f'Starting {server_a}')
await manager.server_start(server_a.server_id)
logging.info('Adding a normal server')
await manager.server_add(property_file={"dc": "dc1", "rack": "r2"})
cql = manager.get_cql()
await wait_for_cql_and_get_hosts(cql, [server_a], time.time() + 60)
> async with new_test_keyspace(manager, "WITH replication = {'class': 'NetworkTopologyStrategy', 'replication_factor': 2} AND tablets = { 'enabled': true }") as ks_name:
test/cluster/test_not_enough_token_owners.py:57:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib64/python3.14/contextlib.py:221: in __aexit__
await anext(self.gen)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
manager = <test.pylib.manager_client.ManagerClient object at 0x7f37efe00830>
opts = "WITH replication = {'class': 'NetworkTopologyStrategy', 'replication_factor': 2} AND tablets = { 'enabled': true }"
host = None
@asynccontextmanager
async def new_test_keyspace(manager: ManagerClient, opts, host=None):
"""
A utility function for creating a new temporary keyspace with given
options. It can be used in a "async with", as:
async with new_test_keyspace(ManagerClient, '...') as keyspace:
"""
keyspace = await create_new_test_keyspace(manager.get_cql(), opts, host)
try:
yield keyspace
except:
logger.info(f"Error happened while using keyspace '{keyspace}', the keyspace is left in place for investigation")
raise
else:
> await manager.get_cql().run_async("DROP KEYSPACE " + keyspace, host=host)
E cassandra.cluster.NoHostAvailable: ('Unable to complete the operation against any hosts', {<Host: 127.69.108.39:9042 dc1>: ConnectionException('Pool for 127.69.108.39:9042 is shutdown')})
test/cluster/util.py:544: NoHostAvailable
```
Fixes#28011Closesscylladb/scylladb#28040
(cherry picked from commit 34df158605)
Closesscylladb/scylladb#28073
Currently, tablet allocation intentionally ignores current load (
introduced by the commit #1e407ab) which could cause identical shard
selection when allocating a small number of tablets in the same topology.
When a tablet allocator is asked to allocate N tablets (where N is smaller
than the number of shards on a node), it selects the first N lowest shards.
If multiple such tables are created, each allocator run picks the same
shards, leading to tablet imbalance across shards.
This change initializes the load sketch with the current shard load,
scaled into the [0,1] range, ensuring allocation still remains even
while starting from globally least-loaded shards.
Fixes https://github.com/scylladb/scylladb/issues/27620
Closes https://github.com/scylladb/scylladb/pull/27802Closesscylladb/scylladb#28060
Due to the recent changes in the vector store service,
the service needs to read two of the system tables
to function correctly. This was not accounted for
when the new permission was added. This patch fixes that
by allowing these tables (group0_history and versions)
to be read with the VECTOR_SEARCH_INDEXING permission.
We also add a test that validates this behavior.
Fixes: SCYLLADB-73
Closes scylladb/scylladb#27546
(cherry picked from commit ce3320a3ff)
Closesscylladb/scylladb#28042
Parent PR: #27546
The semaphore has detection and protection against regular resource
leaks, where some resources go unaccounted for and are not released by
the time the semaphore is destroyed. There is no detection or protection
against negative leaks: where resources are "made up" of thin air. This
kind of leaks looks benign at first sight, a few extra resources won't
hurt anyone so long as this is a small amount. But turns out that even a
single extra count resource can defeat a very important anti-deadlock
protection in can_admit_read(): the special case which admits a new
permit regardless of memory resources, when all original count resources
all available. This check uses ==, so if resource > original, the
protection is defeated indefinitely. Instead of just changing == to >=,
we add detection of such negative leaks to signal(), via
on_internal_error_noexcept().
At this time I still don't now how this negative leak happens (the code
doesn't confess), with this detection, hopefully we'll get a clue from
tests or the field. Note that on_internal_error_noexcept() will not
generate a coredump, unless ScyllaDB is explicitely configured to do so.
In production, it will just generate an error log with a backtrace.
The detection also clams the _resources to _initial_resources, to
prevent any damage from the negativae leak.
I just noticed that there is no unit test for the deadlock protection
described above, so one is added in this PR, even if only loosely
related to the rest of the patch.
Fixes: SCYLLADB-163
Closesscylladb/scylladb#27764
(cherry picked from commit e4da0afb8d)
Closesscylladb/scylladb#28004
With randomized keys, and since we're inserting only 2 keys,
it is possible that they would end up owned only by a single shard,
reproducing #27639 in snapshot_list_contains_dropped_tables.
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
(cherry picked from commit ebd667a8e0)
Test that table::flush waits on outstanding flushes, even if the active memtable is empty
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
(cherry picked from commit 0342a24ee0)
Many test cases already assume `func` is being called a seastar
thread and although the function they pass returns a (ready) future,
it serves no purpose other than to conform to the interface.
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
(cherry picked from commit ec4069246d)
sstable_validation_test tests the `scylla sstable validate` command
by passing it intentionally corrupted sstables. It uses an sstable
cache to avoid re-creating the same sstables. However, the cache
does not consider the sstable version, so if called twice with the
same inputs for different versions, it will return an sstable with
the original version for both calls. As a results, `ms` sstables
were not tested. Fix this bug by adding the sstable version (and
the schema for good measure) to the cache key.
An additional bug, hidden by the first, was that we corrupted the
sstable by overwriting its Index.db component. But `ms` sstables
don't have an Index.db component, they have a Partitions.db component.
Adjust the corrupting code to take that into account.
With these two fixes, test_scylla_sstable_validate_mismatching_partition_large
fails on `ms` sstables. Disable it for that version. Since it was
previously practically untested, we're not losing any coverage.
Fixing this test unblocks further work on making pytest take charge
of running the tests. pytest exposed this problem, likely by running
it on different runners (and thus reducing the effectiveness of the
cache).
Fixes#27822.
Closesscylladb/scylladb#27825
(cherry picked from commit fc81983d42)
Closesscylladb/scylladb#27863
The test generates a staging sstable on a node and verifies whether
the view is correctly populated.
However view updates generated by a staging sstable
(`view_update_generator::generate_and_propagate_view_updates()`) aren't
awaited by sstable consumer.
It's possible that the view building coordinator may see the task as finished
(so the staging sstable was processed) but not all view updates were
writted yet.
This patch fixes the flakiness by waiting until
`scylla_database_view_update_backlog` drops down to 0 on all shards.
Fixesscylladb/scylladb#26683Closesscylladb/scylladb#27389
(cherry picked from commit 74ab5addd3)
Closesscylladb/scylladb#27739
