kafka-python引发UnrecognizedBrokerVersion错误

Question

使用 kafka-python 包构建 KafkaProducer 时，我遇到了这个错误：

[ERROR] UnrecognizedBrokerVersion: UnrecognizedBrokerVersion
Traceback (most recent call last):
  File "/var/lang/lib/python3.7/imp.py", line 234, in load_module
    return load_source(name, filename, file)
  File "/var/lang/lib/python3.7/imp.py", line 171, in load_source
    module = _load(spec)
  File "<frozen importlib._bootstrap>", line 696, in _load
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/var/task/kafka/producer/kafka.py", line 381, in __init__
    **self.config)
  File "/var/task/kafka/client_async.py", line 240, in __init__
    self.config['api_version'] = self.check_version(timeout=check_timeout)
  File "/var/task/kafka/client_async.py", line 908, in check_version
    version = conn.check_version(timeout=remaining, strict=strict, topics=list(self.config['bootstrap_topics_filter']))
  File "/var/task/kafka/conn.py", line 1228, in check_version
    raise Errors.UnrecognizedBrokerVersion()

代码如下：

from kafka import KafkaProducer
producer = KafkaProducer(bootstrap_servers=os.environ.get('KAFKA_HOST', 'localhost:9092'))

我正在使用Python 3.7和AWS MSK集群。

- Rene B.

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看起来这个问题和这个问题一样：https://github.com/dpkp/kafka-python/issues/1796 - luis.parravicini

@luis.parravicini，我现在没有使用SSL。最后一条评论说要停用SSL。你有什么建议吗？ - Rene B.

Answer 1

通过向 KafkaProducer 添加 security_protocol="SSL" 解决了问题。

from kafka import KafkaProducer
producer = KafkaProducer(security_protocol="SSL", bootstrap_servers=os.environ.get('KAFKA_HOST', 'localhost:9092'))

- Rene B.

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如果不使用SSL，我可以使用PLAINTEXT吗？导入os 从kafka导入KafkaConsumer producer = KafkaConsumer(security_protocol="PLAINTEXT", bootstrap_servers=os.environ.get('KAFKA_HOST', 'localhost:2181')) 在返回错误后raise Errors.UnrecognizedBrokerVersion() kafka.errors.UnrecognizedBrokerVersion: UnrecognizedBrokerVersion，如何解决？ - Nikolay Baranenko

@NikolayBaranenko 将端口从2181更改为9092。 - Inego

@dudemonkey请随意发布“实际解决方案”。 - Rene B.

Answer 2

kafka-python库方法有许多可选参数。以下是我最近使用的工作脚本，我能够监听Azure服务器：

import os, kafka  # pip install kafka-python

consumer = kafka.KafkaConsumer("test-topic",
    bootstrap_servers=["test-server.servicebus.windows.net:9093"],
    auto_offset_reset="earliest",
    enable_auto_commit=True,
    group_id="$Default",
    sasl_mechanism="PLAIN",
    sasl_plain_password=os.environ["KAFKA_PASSWORD"],
    sasl_plain_username="$ConnectionString",
    security_protocol="SASL_SSL",
    value_deserializer=lambda x: x.decode("utf-8"))

print(datetime.datetime.now())
for message in consumer:
    message_dict = json.loads(message.value)
    print(datetime.datetime.now())
    print("%s" % (json.dumps(message_dict,indent=4)))

虽然粗糙，但很有效。比起Java包装在bash中的Kafka演示消费者更加简单，后者需要各种配置文件和环境变量。你可以在https://kafka.apache.org/quickstart页面找到该演示。

- MarkHu

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$ConnectionString是什么，密码又是什么？应该使用哪个密钥标签？ - Prem Prakash