We are using Confluent’s Kafka Python Client for reading messages from a Kafka Topic.

The python code was running perfectly for last 8 months daily without any issue, but in recent days we are sporadically getting issues while consuming data from kafka topic.

Below is the python code behaviour when the issue occurs :

  1. After consuming some amount of messages, consumer.poll() returns “None” even if messages are present on the topic
  2. While committing the offset of the last received message, the program crashes with KafkaError{code=_ASSIGNMENT_LOST,val=-142,str=“Commit failed: Local: Group partition assignment lost”}.

This issue only happens sporadically and has started to occur in recent days. Please help.