Java FAQ: Top Questions

Safepoints are points in a Java program’s execution where the JVM can safely pause all threads to perform operations like garbage collection, thread dumps, or code deoptimization.

• Conditions: Threads are at known states (e.g., method calls, loop boundaries).
• Global Safepoint: All threads paused; triggered by GC or JVM operations.
• Polling: Threads check for safepoint requests periodically.
• Impact: Affects latency; long-running native code delays safepoints.
• Use Case: Essential for JVM maintenance tasks.