# Metricbeat get panic during collect system/process "interface conversion: cgroup.CGStats is nil"

**URL:** <https://discuss.elastic.co/t/metricbeat-get-panic-during-collect-system-process-interface-conversion-cgroup-cgstats-is-nil/361591>\
**Category:** Beats\
**Tags:** metricbeat\
**Created:** [June 17, 2024, 4:52pm UTC](https://discuss.elastic.co/t/metricbeat-get-panic-during-collect-system-process-interface-conversion-cgroup-cgstats-is-nil/361591 "2024-06-17T16:52:40Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![majuca](https://avatars.discourse-cdn.com/v4/letter/m/9fc348/32.png) [@majuca](https://discuss.elastic.co/u/majuca)\
**Post date:** [June 17, 2024, 4:52pm UTC](https://discuss.elastic.co/t/metricbeat-get-panic-during-collect-system-process-interface-conversion-cgroup-cgstats-is-nil/361591/1 "2024-06-17T16:52:40Z")

</div>

metricbeat version: 7.17.20  
Metricbeat stopped sending process information 2 min after the restart. After that, it stops sending 'system/process' events and shows the following error message in the log file:

```auto
{"level":"info","timestamp":"2024-06-17T16:26:49.957Z","caller":"template/load.go:110","message":"Template \"metricbeat-7.17.20\" already exists and will not be overwritten."}
{"level":"info","timestamp":"2024-06-17T16:26:49.957Z","logger":"index-management","caller":"idxmgmt/std.go:296","message":"Loaded index template."}
{"level":"info","timestamp":"2024-06-17T16:26:49.959Z","logger":"index-management.ilm","caller":"ilm/std.go:126","message":"Index Alias metricbeat-7.17.20 exists already."}
{"level":"info","timestamp":"2024-06-17T16:26:49.959Z","logger":"publisher_pipeline_output","caller":"pipeline/output.go:151","message":"Connection to backoff(elasticsearch(http://10.0.38.172:10002)) established"}
{"level":"error","timestamp":"2024-06-17T16:28:19.814Z","caller":"runtime/iface.go:263","message":"recovered from panic while fetching 'system/process' for host ''. Recovering, but please report this.","panic":"interface conversion: cgroup.CGStats is nil, not *cgroup.StatsV2","stack":"github.com/elastic/beats/v7/libbeat/logp.Recover\n\t/go/src/github.com/elastic/beats/libbeat/logp/global.go:102\nruntime.gopanic\n\t/usr/local/go/src/runtime/panic.go:914\nruntime.panicdottypeE\n\t/usr/local/go/src/runtime/iface.go:263\nruntime.panicdottypeI\n\t/usr/local/go/src/runtime/iface.go:273\ngithub.com/elastic/beats/v7/libbeat/metric/system/cgroup.(*StatsV2).FillPercentages\n\t/go/src/github.com/elastic/beats/libbeat/metric/system/cgroup/cgstats.go:122\ngithub.com/elastic/beats/v7/libbeat/metric/system/process.(*Stats).getSingleProcess\n\t/go/src/github.com/elastic/beats/libbeat/metric/system/process/process.go:559\ngithub.com/elastic/beats/v7/libbeat/metric/system/process.(*Stats).Get\n\t/go/src/github.com/elastic/beats/libbeat/metric/system/process/process.go:480\ngithub.com/elastic/beats/v7/metricbeat/module/system/process.(*MetricSet).Fetch\n\t/go/src/github.com/elastic/beats/metricbeat/module/system/process/process.go:114\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"}

```

/etc/metricbeat/metricbeat.yml

```auto
# Ansible managed

################### metricbeat Configuration #########################

############################# metricbeat ######################################
metricbeat.modules:
- metricsets:
  - cpu
  - load
  - memory
  - network
  - process
  - diskio
  - service
  - users
  module: system
  period: 10s
  process.include_top_n:
    by_cpu: 10
    by_memory: 10

###############################################################################
############################# Libbeat Config ##################################
# Base config file used by all other beats for using libbeat features

############################# Output ##########################################

output:
  elasticsearch:
    hosts:
    - http://10.0.38.171:10002
    - http://10.0.38.172:10002

############################# Logging #########################################

logging:
  files:
    keepfiles: '3'
    name: metricbeat
    path: /var/log/metricbeat
    permissions: '0644'
  json: true
  level: info
  metrics.enabled: false
  to_files: true
  to_syslog: false

```

```auto
# yum list metricbeat
This system is receiving updates from OSMS server.
Last metadata expiration check: 0:20:53 ago on Mon 17 Jun 2024 04:26:36 PM GMT.
Installed Packages
metricbeat.x86_64 7.17.20-1 @beats
[

# cat /etc/redhat-release
Red Hat Enterprise Linux release 8.9 (Ootpa)

```

The server is running in Oracle OCI Cloud.

---

<div class="post-metadata">

**Author:** ![Adrien\_Petel](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/adrien_petel/32/140619_2.png) [@Adrien\_Petel](https://discuss.elastic.co/u/Adrien_Petel)\
**Post date:** [October 9, 2025, 7:24am UTC](https://discuss.elastic.co/t/metricbeat-get-panic-during-collect-system-process-interface-conversion-cgroup-cgstats-is-nil/361591/2 "2025-10-09T07:24:05Z")

</div>

Hello,

We are noticing the same issue: at some point there is a `panic` in Metricbeat that gets recovered, but after that process metrics are no longer sent.

We’re noticed the problem with Metricbeat 7.17.29 on Rocky Linux 9.

Panic trace:

```auto
ERROR runtime/iface.go:275 recovered from panic while fetching 'system/process' for host ''. Recovering, but please report this. {"panic": "interface conversion: cgroup.CGStats is nil, not *cgroup.StatsV2", "stack": "github.com/elastic/beats/v7/libbeat/logp.Recover\n\t/go/src/github.com/elastic/beats/libbeat/logp/global.go:102\nruntime.gopanic\n\t/usr/local/go/src/runtime/panic.go:791\nruntime.panicdottypeE\n\t/usr/local/go/src/runtime/iface.go:275\nruntime.panicdottypeI\n\t/usr/local/go/src/runtime/iface.go:285\ngithub.com/elastic/beats/v7/libbeat/metric/system/cgroup.(*StatsV2).FillPercentages\n\t/go/src/github.com/elastic/beats/libbeat/metric/system/cgroup/cgstats.go:122\ngithub.com/elastic/beats/v7/libbeat/metric/system/process.(*Stats).getSingleProcess\n\t/go/src/github.com/elastic/beats/libbeat/metric/system/process/process.go:559\ngithub.com/elastic/beats/v7/libbeat/metric/system/process.(*Stats).Get\n\t/go/src/github.com/elastic/beats/libbeat/metric/system/process/process.go:480\ngithub.com/elastic/beats/v7/metricbeat/module/system/process.(*MetricSet).Fetch\n\t/go/src/github.com/elastic/beats/metricbeat/module/system/process/process.go:114\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"}

```