Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/22218#discussion_r214561873
--- Diff:
core/src/main/scala/org/apache/spark/executor/ExecutorSource.scala ---
@@ -73,6 +76,28 @@ class ExecutorSource(threadPool: ThreadPoolExecutor,
executorId: String) extends
registerFileSystemStat(scheme, "write_ops", _.getWriteOps(), 0)
}
+ // Dropwizard metrics gauge measuring the executor's process CPU time.
+ // This Gauge will try to get and return the JVM Process CPU time or
return -1 otherwise.
+ // The CPU time value is returned in nanoseconds.
+ // It will use proprietary extensions such as
com.sun.management.OperatingSystemMXBean or
+ // com.ibm.lang.management.OperatingSystemMXBean, if available.
+ metricRegistry.register(MetricRegistry.name("jvmCpuTime"), new
Gauge[Long] {
+ val mBean: MBeanServer = ManagementFactory.getPlatformMBeanServer
+ val name = new ObjectName("java.lang", "type", "OperatingSystem")
+ override def getValue: Long = {
+ try {
+ val attribute = mBean.getAttribute(name, "ProcessCpuTime")
+ if (attribute != null) {
--- End diff --
I checked the doc for `getAttribute though, when does it return null?
https://docs.oracle.com/javase/8/docs/api/javax/management/MBeanServerConnection.html#getAttribute-javax.management.ObjectName-java.lang.String-
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