This commit makes sure that the RabbitMQ password filed is marked as
required. This ensures that the user provides a password and that the
bridge does not throw a function clause exception if the password filed
is not set.
Fixes:
https://emqx.atlassian.net/browse/EMQX-9974
connect failure should be at warning level but not error,
the connecting state is visiable from dashbaord
also the resource manager logs connection failures in general
at warning level
This surprisingly simple change yields a big performance improvement
in throughput.
While the previous commit achieves ~ 55 k messages / s
in throughput under some test conditions (100 k concurrent publishers
publishing 1 QoS 1 message per second), the simple change in this
commit improves it further to ~ 63 k messages / s.
Benchmarks indicated that the evaluating one reply function is
consistently quite fast (~ 20 µs), which makes this performance gain
counterintuitive. Perhaps, although each call is cheap, `ehttpc`
calls several of these in a row when there are several sent requests,
and those costs might add up in latency.
This is a performance improvement for webhook bridge.
Since this bridge is called using `async` callback mode, and `ehttpc`
frequently returns errors of the form `normal` and `{shutdown,
normal}` that are retried "for free" by `ehttpc`, we add this behavior
to async requests as well. Other errors are retried too, but they are
not "free": 3 attempts are made at a maximum.
This is important because, when using buffer workers, we should avoid
making them enter the `blocked` state, since that halts all progress
and makes throughput plummet.
Before this change, a separate `manager_id` / `instance_id` was used
as resource manager id, which made connector interface somewhat
inconsistent: part of function calls to connector implementation
used instance id as first argument while the rest used resource id
itself.
Apparently, the async reply returned by ehttpc can be `{shutdown,
normal}` or `{closed, "The connection was lost."}`, in which case the
request should be retried.
```
Apr 28 17:40:41 emqx-0.int.thales bash[48880]: 17:40:41.803 [error] [id: "bridge:webhook:webhook", msg: :unrecoverable_error, reason: {:shutdown, :normal}]
Apr 28 18:36:37 emqx-0.int.thales bash[53368]: 18:36:37.605 [error] [id: "bridge:webhook:webhook", msg: :unrecoverable_error, reason: {:closed, 'The connection was lost.'}]
```
Fixes https://emqx.atlassian.net/browse/EMQX-9130
Since buffer workers always support async calls ("outer calls"), we
should decouple those two call modes (inner and outer), and avoid
exposing the inner call configuration to user to avoid complexity.
For bridges that currently only allow sync query modes, we should
allow them to be configured with async. That means basically all
bridge types except Kafka Producer.
This complements PR https://github.com/emqx/emqx/pull/10124.
The default values for duration_ms() fields needs to be formatted
as a binary string with unit to show up correctly in the dashboard
UI.
Our MongoDB driver creates a new temporary connection, for every active
connection, to just do a single heartbeat test. There is configurable
delay between every heartbeat test. When the user has an EMQX cluster
with a MongoDB bridge (to a MongoDB replica set), there will be a lot of
connections. Furthermore, as MongoDB creates a log entry every time a
new connection is created, the log will be flooded with info about new
connection. One user have reported more than 1MB of log data in a 10
minute period.
This commit tries to fix this by increasing the default delay between
heartbeats. A better fix would be to change the MongoDB driver so that
it does not create a new connection just to do a heartbeat check, but
this is more complicated so we leave this to the future. We might also
swap out the current MongoDB driver to something better.
Fixes:
https://github.com/emqx/emqx/issues/9851
Also hexencode non-utf8 binaries. This is essentially an heuristic.
We don't know column types in runtime, and there's no simple way
to find them out. Since we're already doing full binary scan during
escaping it should be cheap to bail out on non-utf8 strings and
hexencode them instead.
Also introduce separate function to highlight that this escaping
is MySQL-specific.
So that mysql client won't attempt to prepare them automatically, thus
trashing the server's prepared statements table and making interaction
overall heavier.
When using async mode with the webhook bridge, queued messages that are
not fully processed when the connection times out could be lost. This
commit fixes this by letting the bridge return a recoverable_error when
this happen. The message send will then be retried in sync mode by the
emqx_resource_buffer_worker.
Fixes: https://emqx.atlassian.net/browse/EMQX-8974
This commit adds a Clickhouse bridge to EMQX 5. The bridge is similar to
the Clickhouse bridge in the 4.4, but adds the possibility to use
different formats (such as JSON) for values to be inserted.
