davidradl commented on code in PR #26492:
URL: https://github.com/apache/flink/pull/26492#discussion_r2058580961
##########
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/util/MetricUtils.java:
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@@ -338,6 +339,30 @@ static void instantiateMetaspaceMemoryMetrics(final
MetricGroup parentMetricGrou
}
}
+ static void instantiateFileDescriptorMetrics(MetricGroup metrics) {
+ try {
+ final com.sun.management.OperatingSystemMXBean mxBean =
+ (com.sun.management.OperatingSystemMXBean)
+ ManagementFactory.getOperatingSystemMXBean();
+
+ if (mxBean instanceof
com.sun.management.UnixOperatingSystemMXBean) {
Review Comment:
> Yes, it will throw exception and caught in line 358.
Ok thanks. In the case where the instanceof fails it would be good to
mention the that JVM does not have this class in the error message, maybe a
separate catch to give a more informative message.
How do we get into the else case? Can a bean of the wrong type get into this
code?
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