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Aleksey Plekhanov commented on IGNITE-13306: -------------------------------------------- Cherry-picked to 2.9 > CpuLoad metric return -1 under Java 11 > -------------------------------------- > > Key: IGNITE-13306 > URL: https://issues.apache.org/jira/browse/IGNITE-13306 > Project: Ignite > Issue Type: Bug > Affects Versions: 2.8.1 > Reporter: Mirza Aliev > Assignee: Mirza Aliev > Priority: Major > Fix For: 2.9 > > Time Spent: 20m > Remaining Estimate: 0h > > Start cluster under Java 11. > Observed: > CpuLoad metric will return -1 > Expected: > Real CpuLoad. > We investigated this issue and found that under Java 11 code failed with > following trace: > {code:java} > class org.apache.ignite.IgniteException: Failed to get property value > [property=processCpuTime, > obj=com.sun.management.internal.OperatingSystemImpl@1dd92fe2] at > org.apache.ignite.internal.util.IgniteUtils.property(IgniteUtils.java:8306) > at > org.apache.ignite.internal.managers.discovery.GridDiscoveryManager$MetricsUpdater.getCpuLoad(GridDiscoveryManager.java:3131) > at > org.apache.ignite.internal.managers.discovery.GridDiscoveryManager$MetricsUpdater.run(GridDiscoveryManager.java:3093) > at > org.apache.ignite.internal.processors.timeout.GridTimeoutProcessor$CancelableTask.onTimeout(GridTimeoutProcessor.java:364) > at > org.apache.ignite.internal.processors.timeout.GridTimeoutProcessor$TimeoutWorker.body(GridTimeoutProcessor.java:233) > at > org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:119) at > java.base/java.lang.Thread.run(Thread.java:834) Caused by: > java.lang.reflect.InaccessibleObjectException: Unable to make public long > com.sun.management.internal.OperatingSystemImpl.getProcessCpuTime() > accessible: module jdk.management does not "opens > com.sun.management.internal" to unnamed module @35fb3008 at > java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:340) > at > java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:280) > at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:198) > at java.base/java.lang.reflect.Method.setAccessible(Method.java:192) at > org.apache.ignite.internal.util.IgniteUtils.property(IgniteUtils.java:8297) > ... 6 more > {code} > Under Java 8 metric has expected value. > > Solution: > The behaviour is expected because in Java 11 the CPU load metrics is moved to > JDK internal module which is not accessible by default. Adding the following > line to the jvm in which Ignite node is started should solve the issue: > {noformat} > --add-opens jdk.management/com.sun.management.internal=ALL-UNNAMED{noformat} -- This message was sent by Atlassian Jira (v8.3.4#803005)