Dear ZGC experts, We are using ZGC on JDK17 (AWS JDK17, OpenJDK 64-Bit Server VM (17.0.10+8-LTS) for linux-amd64 JRE (17.0.10+8-LTS), built on Feb 6 2024 19:58:14 by "jenkins" with gcc 7.3.1 20180303 (Red Hat 7.3.1-5)), from JFR, we found there are several consecutive Allocation Stall event, high GC duration (8s+) but low pause(<< 1ms), and our health check failed (2s timeout) during that period, no safepoint begin(default 10ms threshold) JFR event. I am curious, will ZGC allocation stall block the application to serve health check requests during the whole phase (8s+)? Otherwise I can't understand why the health check will fail? Really appreciate ur great help in advance! [image: image.png] [image: image.png] [image: image.png] Thanks Roy