Definition

   The exception is Consumer The exception occurred when the end submitted the displacement , And it's an unrecoverable serious anomaly .

What happened

scene 1：

The total time of message processing exceeded the expected max.poll.interval.ms Parameter values .

Solution ：

1. Improve the speed of message processing , Reduce single message processing time .
2. growth Broker Terminal max.poll.interval.ms Value .
3. Reduce the total number of messages consumed by the downstream system at one time .
4. Downstream systems use multithreading to speed up consumption .（ This method is the most advanced , But the hardest thing to achieve .）

It is recommended to use the first one, and first consider .

scene 2：

Standalone Consumer( Independent consumers ) designated group.id And consumer groups group.id identical .

Solution ：

1. This can only be carefully checked by yourself .