* fix: Fix `test_flushall_in_full_sync`
This test failed in CI many times. The issue was that we reach stable
sync too quickly, and miss the full sync stage.
I changed the seeder to add 100k (instead of 30k) keys for the stage to
take longer.
* StaticSeeder
Until now, we only tested Dragonfly against Redis 6.2. It appears that
something has changed in the way Redis sends stable sync commands, and
now they also forward `MULTI` and `EXEC` as part of their replication.
Since we do not allow all commands to run under `MULTI`/`EXEC`,
specifically `SELECT`, a Dragonfly replica of such servers failed these
commands and became inconsistent with the data on the master.
The proposed fix is to simply ignore (i.e. not execute) `MULTI`/`EXEC`
coming from a Redis/Valkey master, and run the commands within those
transactions individually, like we do for other transactions.
To test this we randomly choose a redis/valkey server based on 3
available installed binaries and test against them.
* fix: Do not publish to connections without context
This is a rare case where a closed connection is kept alive while the
handling fiber yields, therefore leaving `cc_` (the connection context)
pointing to null for other fibers to see.
As far as I can see, this can only happen during server shutdown, but
there could be other cases that I have missed.
The test on its own does _not_ reproduce the crash, however with added
`ThisFiber::SleepFor()`s I could reproduce the crash:
* Right before `DispatchBrief()`
[here](e3214cb603/src/server/channel_store.cc (L154))
* Right after connection context `reset()`
[here](2ab480e160/src/facade/dragonfly_connection.cc (L750))
In any case, calling `SendPubMessageAsync()` to a connection where `cc_`
is null is a bug, and we fix that here.
* rewording
A common case is that we need to clean up a connection before we exit a test via .close() method. This is needed because otherwise the connection will raise a warning that it is left unclosed. However, remembering to call .close() at each connection at the end of the test is cumbersome! Luckily, fixtures in python can be marked as async which allow us to:
* cache all clients created by DflyInstance.client()
* clean them all at the end of the fixture in one go
---------
Signed-off-by: kostas <kostas@dragonflydb.io>
We do not allow notify_keyspace_events to be set at runtime via config set command.
* allow notify_keyspace_events in config set command
* add tests
---------
Signed-off-by: kostas <kostas@dragonflydb.io>
* fix bitiop creating the dst key if result is empty
* fix replicating dst with the wrong type
* make bitop a blind update (similar to set command)
---------
Signed-off-by: kostas <kostas@dragonflydb.io>
* chore: Forbid replicating a replica
We do not support connecting a replica to a replica, but before this PR
we allowed doing so. This PR disables that behavior.
Fixes#3679
* `replicaof_mu_`
fix: Fix flaky test `test_acl_revoke_pub_sub_while_subscribed`
The reason it failed is that, in some rare cases, the subscriber did not
get the first few messages of the publisher. This is likely due to
timing of subscribe and publish, in different connections / threads.
Given Pub/Sub has very weak guarantees, it's probably ok as is, so I
just added a sleep to get the test to pass always.
The test assumed any shutdown will take not more than 1s. This doesn't
always hold, and also waiting for 1s isn't ideal because usually it
takes less than that.
Changed to use `assert_eventually` instead.
Fixes#3684
There are 2 minor issues with this test:
1. It specified `cmdstat_replconf` as `cmd_stats` instead of `cmd`,
that's clearly a typo as `cmd_stats` is a map with stats, while
`replconf` is a Dragonfly command
2. Command `MULTI` is allowed to run even when the server is in paused
state, see
[here](https://github.com/dragonflydb/dragonfly/blob/main/src/server/main_service.cc#L1197):
```
// Don't interrupt running multi commands or admin connections.
```
Fixes#3675
We disable address space randomization when building the binary
and use addr2line to symbolize the stacktrace if it exists.
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
* feat: add slave_repl_offset to the replication section.
In Valkey slave_repl_offset denotes the replication offset on replica site during stable sync phase.
During fullsync phase it appears with 0 value.
In Dragonfly this field appears only after full sync has completed, thus it allows
to check whether Dragonfly reached stable sync phase. The value of this field describes the cumulative progress
of all the replication flows and it does not directly correspond to master side metrics.
In addition, this PR fixes the bug in wait_available_async() function in our replication tests.
This function is intended to wait until a replica reaches stable state and it did by sending pings until they do not
respond with LOADING error, hence the assumption is that the replica is in full sync state already.
However it can happen that master_link_status is "up" but replica has not reached full sync state, and the PING will succeed
just because wait_available_async() was called before full sync started. The whole approach of polling the state is fragile.
Now we use `slave_repl_offset` explicitly to see if the replica reaches stable state.
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
* chore: simplify wait_available_async
* chore: comments
---------
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
* chore: enable experimental_new_io by default.
It has been running for weeks with the flag on, so enabled it also for community.
---------
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
Signed-off-by: Vladislav Oleshko <vlad@dragonflydb.io>
Co-authored-by: Vladislav Oleshko <vlad@dragonflydb.io>
