JBR-4457 getOperatingSystemMXBean throws an NPE

Instead of picking specifically memory cgroup for "anyController", pick any controller that appeared to be first in the map.
2026-01-08 17:41:41 +01:00 · 2022-05-12 08:00:32 -07:00
1 changed files with 1 additions and 1 deletions
--- a/src/java.base/linux/classes/jdk/internal/platform/CgroupSubsystemFactory.java
+++ b/src/java.base/linux/classes/jdk/internal/platform/CgroupSubsystemFactory.java
@@ -110,7 +110,7 @@ public class CgroupSubsystemFactory {
        Map<String, CgroupInfo> infos = result.getInfos();
        if (result.isCgroupV2()) {
            // For unified it doesn't matter which controller we pick.
-            CgroupInfo anyController = infos.get(MEMORY_CTRL);
+            CgroupInfo anyController = infos.values().iterator().next();
            CgroupSubsystem subsystem = CgroupV2Subsystem.getInstance(anyController);
            return subsystem != null ? new CgroupMetrics(subsystem) : null;
        } else {