High CPU utilization in a Java application like AEM is typically caused by active threads stuck in infinite loops, recursive calls, or highly intensive processing tasks. A "Thread Dump" takes a snapshot of exactly what every thread in the JVM is executing at that specific millisecond. By taking multiple thread dumps a few seconds apart and comparing them, a DevOps engineer can identify which specific threads (and therefore which Java classes/methods) are constantly active and consuming the CPU resources. (Heap dumps are used for memory issues, not CPU issues).
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