flink_taskmanager_status_jvm_cpu_load

High garbage collection pressure on TaskManagers causes processing slowdowns that create backpressure, increased state size, and eventually full GC pauses lasting minutes.

Growing source lag combined with stable or decreasing throughput indicates the job cannot keep pace with input rate, leading to increasing latency and eventual processing failure.

Insufficient registered TaskManagers or task slots prevent job scaling, causing underutilization and inability to handle load increases.