orbang opened a new issue #7048:
URL: https://github.com/apache/pulsar/issues/7048
When using shared subscriptions with the C++ client we see the following
issues:
* The consumers stop consuming silently after a period of time, without any
obvious reasons (e.g. connection failure) or any unusual log messages. The
issue seems to happen randomly. Recreating the consumers with the same
parameters seems to fix this issue for a while. We are experiencing this issue
both using the synchronous and the async APIs. The topic is non-partitioned
persistent topic. The server is a standalone server. We only see this problem
with shared consumers, it doesn't seem to happen if we change to exclusive.
* Acknowledged messages get redelivered to shared consumers in C++ after
subscription. It seems to happen both with synchronous and async
acknowledgment. The API docs on acknowledge() states that acknowleded messages
should not be redelivered.
**To Reproduce**
Create shared consumers in C++ for a topic and call receive. The problem
seems to happen randomly but relatively frequently. It does not occur with
exclusive consumers.
**Expected behavior**
* At least one of the shared consumers should receive each message.
* Acknowledged messages should not be redelivered.
**Desktop (please complete the following information):**
- RedHat 7.x
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