Data Thinking Notes
Dec 6, 2022 · Big Data
Why Did Multiple HDFS DataNodes Crash? Memory, GC, and Block Overload Explained
This article analyzes a midnight HDFS DataNode failure caused by excessive GC and OOM due to Spark batch jobs, examines how an unexpected surge in block count overloaded default memory settings, and presents concrete remediation steps and optimization recommendations to stabilize the cluster.
Big DataBlock OverloadDataNode
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