Gracefully exit python script using Streams

未关闭
#450 1 条评论 1 个 reaction 已指派 0 人 在 GitHub 查看

还没有人认领这个 Issue。

评估

难度
4/5
预计耗时
3-5 天
新手友好度
25/100
Issue 类型
缺陷
描述清晰度
需要澄清
活跃度
停滞
技术栈
kafka, python
领域
stream-processing

调研方向

Start by tracing Stream.from_kafka_batched and the source.stop() and source.destory() calls in the reported process_messages flow. Reproduce the exception path and inspect how the Kafka consumer is disconnected. Done means the stream and broker connection shut down cleanly and the Python script exits without the reported disconnect logs.

由索引模型根据 Issue 内容生成。

描述

I have a use case associated with pulling data from a Kafka topic. I need the streamz operator exit gracefully and exit the python script once it hits an exception. It looks something like this :

source = Stream.from_kafka_batched(TOPIC, kafka_confs, poll_interval='20s', max_batch_size=10000)

def process_messages():
    try:
         #process_messages
   except Exception as e:
        print(e)
        disconnect_gracefully()

def disconnect_gracefully():
    logging.info("Exit gracefully")
    source.stop()
    source.destory()
    
source.map(process_messages)

While this seems to work for the streamz operator, I feel like it doesn't disconnect from the Kafka broker and I get logs like this

%6|1651194599.149|FAIL|rdkafka#consumer-1| [thrd:GroupCoordinator]: GroupCoordinator: my-kafka-server:9093: Disconnected (after 80522ms in state UP)

So, the script doesn't exit. Any pointers to how this can be done effectively?

主要语言
Python
星标
1.3k
派生
149
30 天内没有已合并 PR

贡献指南

打开贡献指南

从这里开始

  1. 先读完整个 Issue，再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库，在一个分支上完成修改。
  4. 提交 Pull Request，并在描述里引用这个 Issue 编号。

python-streamz/streamz 的其他 Issue

查看 python-streamz/streamz 的全部 Issue

相似的 Issue

更多 Python Issue

把新 issue 发到你的邮箱

精选适合新手参与的 GitHub issue 摘要。