• Version: 7.10.0
• Operating System: Windows Server 2019
  After using a few hours, I got this error:
  2021-01-20T23:16:34.281+0700 ERROR runtime/iface.go:260 recovered from panic while fetching 'iis/application_pool' for host ''. Recovering, but please report this. {"panic": "interface conversion: interface {} is nil, not float64", "stack": "github.com/elastic/beats/v7/libbeat/logp.Recover\n\t/go/src/github.com/elastic/beats/libbeat/logp/global.go:101\nruntime.gopanic\n\t/usr/local/go/src/runtime/panic.go:969\nruntime.panicdottypeE\n\t/usr/local/go/src/runtime/iface.go:260\ngithub.com/elastic/beats/v7/x-pack/metricbeat/module/iis/application_pool.getProcessIds\n\t/go/src/github.com/elastic/beats/x-pack/metricbeat/module/iis/application_pool/reader.go:267\ngithub.com/elastic/beats/v7/x-pack/metricbeat/module/iis/application_pool.(*Reader).mapEvents\n\t/go/src/github.com/elastic/beats/x-pack/metricbeat/module/iis/application_pool/reader.go:161\ngithub.com/elastic/beats/v7/x-pack/metricbeat/module/iis/application_pool.(*Reader).read\n\t/go/src/github.com/elastic/beats/x-pack/metricbeat/module/iis/application_pool/reader.go:151\ngithub.com/elastic/beats/v7/x-pack/metricbeat/module/iis/application_pool.(*MetricSet).Fetch\n\t/go/src/github.com/elastic/beats/x-pack/metricbeat/module/iis/application_pool/application_pool.go:76\ngithub.com/elastic/beats/v7/metricbeat/mb/module.(*metricSetWrapper).fetch\n\t/go/src/github.com/elastic/beats/metricbeat/mb/module/wrapper.go:256\ngithub.com/elastic/beats/v7/metricbeat/mb/module.(*metricSetWrapper).startPeriodicFetching\n\t/go/src/github.com/elastic/beats/metricbeat/mb/module/wrapper.go:234\ngithub.com/elastic/beats/v7/metricbeat/mb/module.(*metricSetWrapper).run\n\t/go/src/github.com/elastic/beats/metricbeat/mb/module/wrapper.go:208\ngithub.com/elastic/beats/v7/metricbeat/mb/module.(*Wrapper).Start.func1\n\t/go/src/github.com/elastic/beats/metricbeat/mb/module/wrapper.go:147"}

Restart windows service, It worked again, after a few hours error again.