Comments (4)
latest will get the latest entry before the consumer group offset is committed. If you want to consume what was there before the consumer group started, you want earliest. :)
from broadway.
Hey @josevalim watching the following video https://youtu.be/ovdSOIXSyzI from Confluent peeps at 6:48; he mentioned the following:
6:47: If the consumer group instance is restarted,
6:48: the first thing it can do is to make a request
6:52: to the coordinator to retrieve its last committed offset.
6:55: And once it has the offset,
6:56: it can resume the consumption
6:59: from that particular offset.
7:00: If this consumer instance is started for the very first time
7:03: and there's no saved position for this consumer group,
7:07: then you can either start consuming
7:10: from the very beginning of this topic partition
7:13: or from the very latest offset.
Mainly the following (I am highlighting a few keywords with asterisks)
7:04 If this consumer instance is started for the **very first time**
7:03 and there's **no saved position for this consumer group**,
7:07 then you can either start consuming
7:10 from the very beginning of this topic partition
7:13 or from the very latest offset.
Reading your comment you mentioned the following:
If you want to consume what was there before the consumer group started
Did you explicitly mean to say started
but exclude restarted
?
I am trying to understand the expected behavior here because my understanding is that based on what the video is saying after a Consumer Group offset is committed, the value of offset_reset_policy
doesn't matter anymore because an offset was committed. It would matter only the very first time the consumer group starts.
Right?
from broadway.
Kind of related to dashbitco/broadway_kafka#27, it said that it was fixed.
We are observing the following.
- We started the consumer with
:latest
and processed and commit the offset - We changed to be
:earliest
- We re-consumed the messages
I would expect the offset_reset_policy
to be ignored once some consumer group offset is committed.
from broadway.
I would expect the offset_reset_policy to be ignored once some consumer group offset is committed.
Me too.
from broadway.
Related Issues (20)
- How to stop a Broadway Kafka pipeline? HOT 1
- Make producer module a keyword list to ease configuration management? HOT 6
- Broadway.update_rate_limit doesn't reset the counter/interval right away HOT 3
- NoopAcknowledger fails with ack key being set HOT 7
- Disable automatic call to handle_batch/4 HOT 2
- [Question] Creating a Broadway Message struct for testing?
- Telemetry distinguish between Producer metrics HOT 2
- [docs] The `Broadway.test_batch` example doesn't work with Broadway 1.0.3 HOT 3
- Dialyzer error on ack_immediately/1 HOT 3
- Broadway v1.0.4 Broadway.NoopAcknowledger returns NoopAcknowledger instead of Broadway.NoopAcknowledger HOT 1
- Add `terminate/3` callback HOT 11
- Oban producer HOT 3
- Allow support for Nimble Options 1.0 HOT 5
- Request for MQTT support in Elixir Broadway HOT 3
- Issues using Broadway with DynamicSupervisor
- `handle_message` timeout HOT 2
- C
- Batcher Concurrency based on batcher_key HOT 2
- GenStage 1.2.0 breaks tests HOT 3
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from broadway.