apache / apache/pulsar-client-python

many "Connection closed" messages after receiving the warning "Received send error from the server: Cannot determine whether the message is a duplicate at this time" from producer

Open
#59 5 comments 0 reactions 1 assignee Claimed by @BewareMyPower View on GitHub
Dominant language
Python
Stars
75
Forks
53
PR merge metrics
No merged PRs in 30d

Description

In my program, there will be eight producers, two of which will be sent to partitioned topics and six of which will be sent to unpartitioned topics.

Below is my topic configuration:
```
producer = client.create_producer(
producer_name='raw-test',
batching_enabled=True,
block_if_queue_full=True,
batching_type=BatchingType.KeyBased,
batching_max_messages=2000,
batching_max_allowed_size_in_bytes=1000 * 1024,
batching_max_publish_delay_ms=20,
compression_type=pulsar.CompressionType.ZSTD,
send_timeout_millis=0,
topic='persistent://ethereum-test/raw/tests'
)
```
I am using `sendAsync()` to send messages, but I am getting many "Connection closed" messages after receiving the warning "Received send error from the server: Cannot determine whether the message is a duplicate at this time".

I also found that I can remove `BatchingType.KeyBased` or turn off batching-mode without encountering this problem, and that the problem does not consistently occur.

Here are my debug logs:
[pulsar_log.txt](https://github.com/apache/pulsar-client-python/files/10199684/pulsar_log.txt)

**pulsar-client version is 2.10.1**
**pulsar cluster version is 2.10.2**

Contributor guide

Open the contributing guide

Assessment

This issue has not been assessed yet.

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.