The upgrade process will update files related to Spark applications. To use the updated files, you must restart the Spark job and reset all Spark checkpoints on Kafka topics. To prevent data loss due to reseting the Kafka topic checkpoint, you must pause forwarding data from Collector Managers to Kafka before you upgrade SSDM. While data forwarding is paused, the data will be stored on the Collector Manager until data forwarding is resumed. Once the Spark application is done processing data that was forwarded to Kafka before forwarding was paused, the checkpoint can safely be reset without data loss.
To pause event forwarding from Collector Manager to Kafka:
In Sentinel Main, click Storage > Scalable Storage > Advanced Configuration > Kafka.
Add the following property and set it to true:
pause.events.tokafka
Click Save.