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_r213418278
##########
File path: common/src/main/java/org/apache/drill/exec/metrics/CpuGaugeSet.java
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@@ -32,13 +32,22 @@
*/
@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 final OperatingSystemMXBean osMXBean;
+ private final RuntimeMXBean rtMXBean;
public CpuGaugeSet() {
- this.osMXBean = (OperatingSystemMXBean)
ManagementFactory.getOperatingSystemMXBean();
this.rtMXBean = ManagementFactory.getRuntimeMXBean();
+ //DRILL-6702: Instead of worrying about compiling with IBM JDK, for now,
we shall provide no CPU metrics for non-HotSpot JVMs
+ OperatingSystemMXBean tempOSMXBean;
+ try {
+ tempOSMXBean = (OperatingSystemMXBean)
ManagementFactory.getOperatingSystemMXBean();
+ } catch (ClassCastException cce) {
+ logger.warn("{}. Detected non-Supported JVM [{}]. CPU Metrics in the
WebUI will not be available!", cce.getMessage(),
System.getProperty("java.vm.name"));
Review comment:
@arina-ielchiieva the only message you get is
``` java.lang.ClassCastException:
com.ibm.lang.management.ExtendedOperatingSystem incompatible with
com.sun.management.OperatingSystemMXBean```
Not very useful, but you still get the simplified message without stack
trace. There isn't much value in adding more information than what is already
there, because the issue only emerged when JDBC drivers were being built using
the IBM JDK, something that a regular user will not face. (my testing showed
that an OracleJDK compiled class ran without issue for an IBM JDK Runtime).
I'll apply Vlad's suggestion & squash the commits.
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