apache / apache/pulsar

[Bug] Replicated Subscriptions can be created on non-replicated topics

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#24,090 10 comments 0 reactions 0 assignees View on GitHub
type/bug
Dominant language
Java
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Avg merge
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Merged PRs (30d)
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Description

### Search before asking

- [x] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.

### Read release policy

- [x] I understand that unsupported versions don't get bug fixes. I will attempt to reproduce the issue on a supported version of Pulsar client and Pulsar broker.

### Version

OS- Rhel 9
Pulsar Version - 3.3.1
JDK Version - 17

### Minimal reproduce step

1. Create a tenant and namespace with allowed clusters A and B.
2. Create a topic without enabling geo replication on namespace or topic level.
3. Connect a consumer on the topic with a replicated subscription on Cluster A.

### What did you expect to see?

An error, as a replicated subscription should not be possible on a non-replicated topic.

### What did you see instead?

No error, with the subscription created and working. If I use Pulsar-admin to get the replication status on Cluster A, the result is **True**.
If I switch to pulsar admin on Cluster B, the subscription doesn't exist.

### Anything else?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Contributor guide

Open the contributing guide

Research direction

Start by reproducing the steps with a tenant, namespace, non-replicated topic, and replicated subscription on Cluster A. Inspect the subscription-creation path and the Pulsar-admin replication status on both clusters. Done means creation returns an error and no subscription exists on either cluster for a non-replicated topic.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
distributed-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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