kkhatua commented on a change in pull request #1437: DRILL-6702: Disable CPU
Reporting for non-HotSpot JDKs
URL: https://github.com/apache/drill/pull/1437#discussion_r212038433
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File path: common/src/main/java/org/apache/drill/exec/metrics/CpuGaugeSet.java
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@@ -32,13 +32,24 @@
*/
@SuppressWarnings("restriction")
public class CpuGaugeSet implements MetricSet {
+ private static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(CpuGaugeSet.class);
private OperatingSystemMXBean osMXBean;
private RuntimeMXBean rtMXBean;
+ private static String nonHotSpotJVMName;
public CpuGaugeSet() {
- this.osMXBean = (OperatingSystemMXBean)
ManagementFactory.getOperatingSystemMXBean();
+ //DRILL-6702: Instead of worrying about compiling with IBM JDK, for now,
we shall provide no CPU metrics for non-HotSpot JVMs
+ if (System.getProperty("java.vm.name").contains("HotSpot")) {
+ this.osMXBean = (OperatingSystemMXBean)
ManagementFactory.getOperatingSystemMXBean();
+ } else {
+ this.osMXBean = null;
+ nonHotSpotJVMName = System.getProperty("java.vm.name");
+ }
this.rtMXBean = ManagementFactory.getRuntimeMXBean();
+ if (nonHotSpotJVMName != null) {
+ logger.warn("Detected non-HotSpot JVM [{}]. CPU Metrics in the WebUI
will not be available!", nonHotSpotJVMName);
+ }
Review comment:
@arina-ielchiieva
Strangely enough, the instance check worked for the IBM JDK as well.
However, if I were to extract the object's classname (
`operatingSystemMXBean.getClass()` ) , I get the following:
Oracle JDK: `sun.management.OperatingSystemImpl`
IBM JDK: `com.ibm.lang.management.internal.UnixExtendedOperatingSystem`
I can do a check for the former, instead of the HotSpot name (though, I
prefer the latter).
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