Tag Archives: Debug experience

Kafka executes the script to create topic error: error org apache. kafka. common. errors. InvalidReplicationFactorException: Replicati

Question:

To test the integration of sparkstreaming and Kafka in the code, you need to create two topics in Kafka in advance, but the following errors are reported during the execution of the creation script

 kafka-topics.sh --zookeeper linux1:2181,linux2:2181,linux3:2181 --create --topic wufabao_topic01 --replication-factor 2 --partitions 3

WARNING: Due to limitations in metric names, topics with a period ('.') or underscore ('_') could collide. To avoid issues it is best to use either, but not both.
Error while executing topic command : Replication factor: 2 larger than available brokers: 0.
[2022-02-09 17:27:18,432] ERROR org.apache.kafka.common.errors.InvalidReplicationFactorException: Replication factor: 2 larger than available brokers: 0.
 (kafka.admin.TopicCommand$)

reason:

The path of metadata stored in zookeeper configured by Kafka is incorrect. The metadata path I configured in Kafka is:
zookeeper connect=linux1:2181,linux2:2181,linux3:2181/myKafka

Solution:

Modify the path of Kafka metadata in the script as follows:
kafka-topics.sh --zookeeper linux1:2181,linux2:2181,linux3:2181/myKafka --create --topic wufabao_topic01 --replication-factor 2 --partitions 3
created successfully

ROS Error: warning: “deprecated pixel format used“

Error log

[swscaler @ 0x28dace0] deprecated pixel format used, make sure you did set range correctly

Reason for error reporting
The above error occurs when using the ROS usb_cam package to call the camera, the error log is written clearly, that is, the video format used is deprecated. The error format is mjpg, after changing it to yuyv, the problem is solved.