python - kafka-python 引发 kafka.errors.ConsumerFetchSizeTooSmall

Question

我正在 python 2.7 中编写一个简单的代码，该代码使用来自 apache kafka 主题的消息传递。代码如下:

from kafka import SimpleConsumer,KafkaClient
group = "my_group_test"
client = KafkaClient('localhost:9092')
cons = SimpleConsumer(client, group, "my_topic")
messages = cons.get_messages(count=1000,block=False)

但是引发了这个异常:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/kafka/consumer/simple.py", line 285, in get_messages
    update_offset=False)
  File "/usr/local/lib/python2.7/dist-packages/kafka/consumer/simple.py", line 320, in _get_message
    self._fetch()
  File "/usr/local/lib/python2.7/dist-packages/kafka/consumer/simple.py", line 425, in _fetch
    raise ConsumerFetchSizeTooSmall()
kafka.errors.ConsumerFetchSizeTooSmall 

我如何修改此参数(ConsumerFetchSize)以使此代码正常工作？

Answer 1

我找到了解决办法， 使用参数max_buffer_size在 SimpleConsumer 中。

工作代码是:

#the size is adherent with my need but is totally arbitrary
cons = SimpleConsumer(client, group, "my_topic",max_buffer_size=9932768)