什么是 AKS？

This article discusses the memory overflow issues that occurred when running Spark on Kubernetes due to two不当的基础设施设置。These settings are: setting `spark.kubernetes.local.dirs.tmpfs=true` to store all shuffle spill data in node memory, and using a hard `podAffinity` rule to force all executors to be placed on the same node. These settings cause shuffle spill to consume node memory instead of disk, leading to repeated OOM failures. By adjusting these settings, the issue can be resolved.