In order to propagate exceptions as values through the CQL layer with
minimal modifications to the interfaces, a new result_message type is
introduced: result_message::exception. Similarly to
result_message::bounce_to_shard, this is an internal type which is
supposed to be handled before being returned to the client.
`announce` now takes a `group0_guard` by value. `group0_guard` can only
be obtained through `migration_manager::start_group0_operation` and
moved, it cannot be constructed outside `migration_manager`.
The guard will be a method of ensuring linearizability for group 0
operations.
1. Generalize the name so it mentions group 0, which schema will be a
strict subset of.
2. Remove the fact that it performs a "read barrier" from the name. The
function will be used in general to ensure linearizability of group0
operations - both reads and writes. "Read barrier" is Raft-specific
terminology, so it can be thought of as an implementation detail.
The functions which prepare schema change mutations (such as
`prepare_new_column_family_announcement`) would use internally
generated timestamps for these mutations. When schema changes are
managed by group 0 we want to ensure that timestamps of mutations
applied through Raft are monotonic. We will generate these timestamps at
call sites and pass them into the `prepare_` functions. This commit
prepares the APIs.
Instead of lengthy blurbs, switch to single-line, machine-readable
standardized (https://spdx.dev) license identifiers. The Linux kernel
switched long ago, so there is strong precedent.
Three cases are handled: AGPL-only, Apache-only, and dual licensed.
For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0),
reasoning that our changes are extensive enough to apply our license.
The changes we applied mechanically with a script, except to
licenses/README.md.
Closes#9937
It's now called with d._d.::database converted to .real_database()
right in the argument passing, so this change can be treated as
the generalization of that .real_database() call.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
Straightforward replacement. Internals of the has_column_family_access()
temporarily get .real_database(), but it will be changed soon.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
Straightforward replacement. Internals of the has_keyspace_access()
temporarily get .real_database(), but it will be changed soon.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
Thrift is a coordinator-side service and should not touch the replica
module. Switch it to data_dictionary.
The switch is straightforward with two exceptions:
- client_state still receives replica::database parameters. After
this change it will be easier to adapt client_state too.
- calls to replica::database::get_version() remain. They should be
rerouted to migration_manager instead, as that deals with schema
management.
execute_schema_command is always called with the same first two
parameters, which are always defined froom the thrift_handler
instance that contains its caller. Simplify it by making it a member
function.
This simplifies migration to data_dictionary in the next patch.
Move replica-oriented classes to the replica namespace. The main
classes moved are ::database, ::keyspace, and ::table, but a few
ancillary classes are also moved. There are certainly classes that
should be moved but aren't (like distributed_loader) but we have
to start somewhere.
References are adjusted treewide. In many cases, it is obvious that
a call site should not access the replica (but the data_dictionary
instead), but that is left for separate work.
scylla-gdb.py is adjusted to look for both the new and old names.
The database, keyspace, and table classes represent the replica-only
part of the objects after which they are named. Reading from a table
doesn't give you the full data, just the replica's view, and it is not
consistent since reconciliation is applied on the coordinator.
As a first step in acknowledging this, move the related files to
a replica/ subdirectory.
The thrift layer started partially having admission control
after commit ef1de114f0,
but code inspection suggests that it might cause use-after-free
in a few cases, when a permit is obtained more than once per
handling - due to the fact that some functions tail-called other
functions, which also obtain a permit.
These extraneous permits are not taken anyore.
Tests: "please trust me" + cassandra-stress in thrift mode
Message-Id: <ac5d711288b22c5fed566937722cceeabc234e16.1639394937.git.sarna@scylladb.com>
In early versions of the series which proposed protocol servers, the
interface had two methods answering pretty much the same question of
whether the server is running or not:
* listen_addresses(): empty list -> server not running
* is_server_running()
To reduce redundancy and to avoid possible inconsistencies between the
two methods, `is_server_running()` was scrapped, but re-added by a
follow-up patch because `listen_addresses()` proved to be unreliable as
a source for whether the server is running or not.
This patch restores the previous state of having only
`listen_addresses()` with two additional changes:
* rephrase the comment on `listen_addresses()` to make it clear that
implementations must return empty list when the server is not running;
* those implementations that have a reliable source of whether the
server is running or not, use it to force-return an empty list when
the server is not running
Tests: dtest(nodetool_additional_test.py)
Signed-off-by: Botond Dénes <bdenes@scylladb.com>
Message-Id: <20211117062539.16932-1-bdenes@scylladb.com>
fmt 8 checks format strings at compile time, and requires that
non-compile-time format strings be wrapped with fmt::runtime().
Do that, and to allow coexistence with fmt 7, supply our own
do-nothing version of fmt::runtime() if needed. Strictly speaking
we shouldn't be introducing names into the fmt namespace, but this
is transitional only.
Closes#9640
Change b0a2a9771f broke
the generic api implementation of
is_native_transport_running that relied on
the addresses list being empty agter the server is stopped.
To fix that, this change introduces a pure virtual method:
protocol_server::is_server_running that can be implemented
by each derived class.
Test: unit(dev)
DTest: nodetool_additional_test.py:TestNodetool.binary_test
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
Message-Id: <20211114135248.588798-1-bhalevy@scylladb.com>
"
On start scylla resolves several hostnames into addresses. Different
places use different hostname selection logic, e.g. the API address
can be the listen one if the dedicated option not set. Failure to
resolve a hostname is reported with an exception that (sometimes)
contains the hostname, but it doesn't look very convenient -- better
to know the config option name. Also resolving of different hostnames
has different decoration around, e.g. prometheus carries a main-local
lambda just to nicely wrap the try/catch block.
This set unifies this zoo and makes main() shorter and less hairy:
1. All failures to resolve a hostname are reported with an
exception containing the relevant config option
2. The || operator for named_value's is introduced to make
the option selection look as short as
resolve(cfg->some_address() || cfg->another_address())
3. All sanity checks are explicit and happen early in main
4. No dangling local variables carrying the cfg->...() value
5. Use resolved IP when logging a "... is listening on ..."
message after a service start
tests: unit(dev)
"
* 'br-ip-resolve-on-start' of https://github.com/xemul/scylla:
main: Move fb-utilities initialization up the main
code: Use utils::resolve instead of inet_address::lookup
main: Remove unused variable
main: Sanitize resolving of listen address
main: Sanitize resolving of broadcast address
main: Sanitize resolving of broadcast RPC address
main: Sanitize resolving of API address
main: Sanitize resolving of prometheus address
utils: Introduce || operator for named_values
db.config: Verbose address resolver helper
main: Remove api-port and prometheus-port variables
alternator: Resolve address with the help of inet_address
redis, thrift: Remove unused captures
There are some users of the latter call left. They all suffer
from the same problem -- the lack of verbosity on resolving
errors.
While at it also get rid of useless local variables that are
only there to carry the cfg->...() option over.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
sprint() uses the printf-style formatting language while most of our
code uses the Python-derived format language from fmt::format().
The last mass conversion of sprint() to fmt (in 1129134a4a)
missed some callers (principally those that were on multiple lines, and
so the automatic converter missed them). Convert the remainder to
fmt::format(), and some sprintf() and printf() calls, so we have just
one format language in the code base. Seastar::sprint() ought to be
deprecated and removed.
Test: unit (dev)
Closes#9529
* github.com:scylladb/scylla:
utils: logalloc: convert debug printf to fmt::print()
utils: convert fmt::fprintf() to fmt::print()
main: convert fprint() to fmt::print()
compress: convert fmt::sprintf() to fmt::format()
tracing: replace seastar::sprint() with fmt::format()
thrift: replace seastar::sprint() with fmt::format()
test: replace seastar::sprint() with fmt::format()
streaming: replace seastar::sprint() with fmt::format()
storage_service: replace seastar::sprint() with fmt::format()
repair: replace seastar::sprint() with fmt::format()
redis: replace seastar::sprint() with fmt::format()
locator: replace seastar::sprint() with fmt::format()
db: replace seastar::sprint() with fmt::format()
cql3: replace seastar::sprint() with fmt::format()
cdc: replace seastar::sprint() with fmt::format()
auth: replace seastar::sprint() with fmt::format()
Convert storage_service::describe_ring to a coroutine
to prevent reactor stalls as seen in #9280.
Fixes#9280Closes#9282
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
Closes#9282
This allows us to forward-declare raw_selector, which in turn reduces
indirect inclusions of expression.hh from 147 to 58, reducing rebuilds
when anything in that area changes.
Includes that were lost due to the change are restored in individual
translation units.
Closes#9434
The thrift_handler class' methods need storage service. This
patch makes sure this class has sharded storage service
reference on board.
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
This is the 2nd PR in series with the goal to finish the hackathon project authored by @tgrabiec, @kostja, @amnonh and @mmatczuk (improved virtual tables + function call syntax in CQL). This one introduces a new implementation of the virtual tables, the streaming tables, which are suitable for large amounts of data.
This PR was created by @jul-stas and @StarostaGit
Closes#8961
* github.com:scylladb/scylla:
test/boost: run_mutation_source_tests on streaming virtual table
system_keyspace: Introduce describe_ring table as virtual_table
storage_service: Pass the reference down to system_keyspace
endpoint_details: store `_host` as `gms::inet_address`
queue_reader: implement next_partition()
virtual_tables: Introduce streaming_virtual_table
flat_mutation_reader: Add a new filtering reader factory method
