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org.apache.druid.java.util.metrics.SysMonitor - Failed to get DiskUsage[/opt/druid/var/druid] org.hyperic.sigar.SigarFileNotFoundException: No such file or directory at org.hyperic.sigar.DiskUsage.gather(Native Method) ~[sigar-1.6.5.132.jar:?] at org.hyperic.sigar.DiskUsage.fetch(DiskUsage.java:30) ~[sigar-1.6.5.132.jar:?] at org.hyperic.sigar.Sigar.getDiskUsage(Sigar.java:680) ~[sigar-1.6.5.132.jar:?] at org.apache.druid.java.util.metrics.SysMonitor$DiskStats.emit(SysMonitor.java:310) ~[druid-core-24.0.0.jar:24.0.0] at org.apache.druid.java.util.metrics.SysMonitor.doMonitor(SysMonitor.java:107) ~[druid-core-24.0.0.jar:24.0.0] at org.apache.druid.java.util.metrics.AbstractMonitor.monitor(AbstractMonitor.java:53) ~[druid-core-24.0.0.jar:24.0.0] at org.apache.druid.java.util.metrics.BasicMonitorScheduler.lambda$startMonitor$0(BasicMonitorScheduler.java:56) ~[druid-core-24.0.0.jar:24.0.0] at org.apache.druid.java.util.common.concurrent.ScheduledExecutors$4.run(ScheduledExecutors.java:163) ~[druid-core-24.0.0.jar:24.0.0] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_275] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_275] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) ~[?:1.8.0_275] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) ~[?:1.8.0_275] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_275] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_275] at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_275]

There is actually an open issue item on this – see https://github.com/apache/druid/issues/10615

you don't need SysMonitor if you are getting machine metrics any other way.

Thanks guys.