Github user sohami commented on a diff in the pull request:
https://github.com/apache/drill/pull/1203#discussion_r182495572
--- Diff:
common/src/main/java/org/apache/drill/exec/metrics/DrillMetrics.java ---
@@ -18,6 +18,7 @@
package org.apache.drill.exec.metrics;
import java.lang.management.ManagementFactory;
+import java.lang.management.OperatingSystemMXBean;
--- End diff --
import not required anymore.---
