Hi everyone, I’m getting a notification for this error about 6 times each day, and I can’t work out what’s causing it. I’ll get a Warning status notification, then back to OK 1 minute later.
CMK version:
2.4.0p8
OS version:
SLES15-SP7
Error message:
Notification email says:
Service: Check_MK Agent
Summary: Version: 2.4.0p8, OS: linux, Agent plug-ins: 0, Local checks: 0, Timed out plugin(s): chrony WARN
Service details:
Version: 2.4.0p8
OS: linux
Agent plug-ins: 0
Local checks: 0
Time until controller certificate for <HOSTNAME>/main, issued by Site 'main' agent signing CA, expires: 4 years 360 days
Cached plugins(s) that reached timeout: chrony (Timeout: 20s, PID: 65235) - Corresponding output is outdated and/or dropped. WARN
Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins)
# omd su main
OMD[main]:~$ cmk --debug -vvn <HOSTNAME>
value store: loading from disk
Checkmk version 2.4.0p8
+ FETCHING DATA
Source: SourceInfo(hostname='<HOSTNAME>', ipaddress='127.0.0.2', ident='agent', fetcher_type=<FetcherType.TCP: 8>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7f64e0981c40]
Read from cache: AgentFileCache(path_template=/omd/sites/main/tmp/check_mk/cache/<HOSTNAME>, max_age=MaxAge(checking=0, discovery=90.0, inventory=90.0), simulation=False, use_only_cache=False, file_cache_mode=6)
Not using cache (Too old. Age is 38 sec, allowed is 0 sec)
Connecting via TCP to 127.0.0.2:6556 (5.0s timeout)
Detected transport protocol: TransportProtocol.TLS
Reading data from agent via TLS socket
Reading data from agent
Detected transport protocol: TransportProtocol.PLAIN
Closing TCP connection to 127.0.0.2:6556
Write data to cache file /omd/sites/main/tmp/check_mk/cache/<HOSTNAME>
Trying to acquire lock on /omd/sites/main/tmp/check_mk/cache/<HOSTNAME>
Got lock on /omd/sites/main/tmp/check_mk/cache/<HOSTNAME>
Releasing lock on /omd/sites/main/tmp/check_mk/cache/<HOSTNAME>
Released lock on /omd/sites/main/tmp/check_mk/cache/<HOSTNAME>
[cpu_tracking] Stop [7f64e0981c40 - Snapshot(process=posix.times_result(user=0.009999999999999787, system=0.0, children_user=0.0, children_system=0.0, elapsed=1.3499999977648258))]
Source: SourceInfo(hostname='<HOSTNAME>', ipaddress='127.0.0.2', ident='piggyback', fetcher_type=<FetcherType.PIGGYBACK: 4>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7f64e0e5bb90]
Read from cache: NoCache(path_template=/dev/null, max_age=MaxAge(checking=0.0, discovery=0.0, inventory=0.0), simulation=False, use_only_cache=False, file_cache_mode=1)
0 piggyback files for '<HOSTNAME>'.
0 piggyback files for '127.0.0.2'.
Get piggybacked data
[cpu_tracking] Stop [7f64e0e5bb90 - Snapshot(process=posix.times_result(user=0.0, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.0))]
[cpu_tracking] Start [7f64e0e5bb90]
+ PARSE FETCHER RESULTS
<<<check_mk>>> / Transition NOOPParser -> HostSectionParser
<<<cmk_agent_ctl_status:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<checkmk_agent_plugins_lnx:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<labels:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<df_v2>>> / Transition HostSectionParser -> HostSectionParser
<<<df_v2>>> / Transition HostSectionParser -> HostSectionParser
<<<systemd_units>>> / Transition HostSectionParser -> HostSectionParser
<<<nfsmounts_v2:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<cifsmounts>>> / Transition HostSectionParser -> HostSectionParser
<<<mounts>>> / Transition HostSectionParser -> HostSectionParser
<<<ps_lnx>>> / Transition HostSectionParser -> HostSectionParser
<<<mem>>> / Transition HostSectionParser -> HostSectionParser
<<<cpu>>> / Transition HostSectionParser -> HostSectionParser
<<<uptime>>> / Transition HostSectionParser -> HostSectionParser
<<<lnx_if>>> / Transition HostSectionParser -> HostSectionParser
<<<lnx_if:sep(58)>>> / Transition HostSectionParser -> HostSectionParser
<<<tcp_conn_stats>>> / Transition HostSectionParser -> HostSectionParser
<<<multipath>>> / Transition HostSectionParser -> HostSectionParser
<<<diskstat>>> / Transition HostSectionParser -> HostSectionParser
<<<kernel>>> / Transition HostSectionParser -> HostSectionParser
<<<md>>> / Transition HostSectionParser -> HostSectionParser
<<<vbox_guest>>> / Transition HostSectionParser -> HostSectionParser
<<<postfix_mailq>>> / Transition HostSectionParser -> HostSectionParser
<<<postfix_mailq_status:sep(58)>>> / Transition HostSectionParser -> HostSectionParser
<<<livestatus_status:sep(59)>>> / Transition HostSectionParser -> HostSectionParser
<<<livestatus_ssl_certs:sep(124)>>> / Transition HostSectionParser -> HostSectionParser
<<<mkeventd_status:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<cmk_site_statistics:sep(59)>>> / Transition HostSectionParser -> HostSectionParser
<<<job>>> / Transition HostSectionParser -> HostSectionParser
<<<chrony:cached(1758181402,120)>>> / Transition HostSectionParser -> HostSectionParser
<<<omd_status:cached(1758181343,60)>>> / Transition HostSectionParser -> HostSectionParser
<<<omd_broker_status:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<omd_broker_queues:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<omd_broker_shovels:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<mknotifyd:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<omd_apache:sep(124)>>> / Transition HostSectionParser -> HostSectionParser
<<<omd_diskusage:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<omd_info:sep(59)>>> / Transition HostSectionParser -> HostSectionParser
<<<local:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
HostKey(hostname='<HOSTNAME>', source_type=<SourceType.HOST: 1>) -> Add sections: ['check_mk', 'checkmk_agent_plugins_lnx', 'chrony', 'cifsmounts', 'cmk_agent_ctl_status', 'cmk_site_statistics', 'cpu', 'df_v2', 'diskstat', 'job', 'kernel', 'labels', 'livestatus_ssl_certs', 'livestatus_status', 'lnx_if', 'local', 'md', 'mem', 'mkeventd_status', 'mknotifyd', 'mounts', 'multipath', 'nfsmounts_v2', 'omd_apache', 'omd_broker_queues', 'omd_broker_shovels', 'omd_broker_status', 'omd_diskusage', 'omd_info', 'omd_status', 'postfix_mailq', 'postfix_mailq_status', 'ps_lnx', 'systemd_units', 'tcp_conn_stats', 'uptime', 'vbox_guest']
HostKey(hostname='<HOSTNAME>', source_type=<SourceType.HOST: 1>) -> Add sections: []
Received no piggyback data
CPU load 15 min load: 0.09, 15 min load per core: 0.04 (2 cores)
CPU utilization Total CPU: 6.36%
Check_MK Agent Version: 2.4.0p8, OS: linux, Agent plug-ins: 0, Local checks: 0
Disk IO SUMMARY Read: 599 B/s, Write: 11.4 kB/s, Latency: 163 microseconds
Filesystem / Used: 30.92% - 6.10 GiB of 19.7 GiB, trend per 1 day 0 hours: +16.0 MiB, trend per 1 day 0 hours: +0.08%, Time left until disk full: 2 years 143 days
Filesystem /boot/efi Used: 0.12% - 316 KiB of 256 MiB, trend per 1 day 0 hours: +0 B, trend per 1 day 0 hours: +0%
Filesystem /sys/firmware/efi/efivars Used: 12.11% - 31.0 KiB of 256 KiB, trend per 1 day 0 hours: +0 B, trend per 1 day 0 hours: +0%
Interface 2 [eth0], (up), MAC: 00:50:56:AA:2F:92, Speed: 10 GBit/s, In: 3.97 kB/s (<0.01%), Out: 1.87 kB/s (<0.01%)
Kernel Performance Process Creations: 8.80/s, Context Switches: 636.37/s, Major Page Faults: 0.15/s, Page Swap in: 0.00/s, Page Swap Out: 0.00/s
Memory Total virtual memory: 41.34% - 3.18 GiB of 7.69 GiB, 8 additional details available
Mount options of / Mount options exactly as expected
Mount options of /boot/efi Mount options exactly as expected
NTP Time Offset: 0.1023 ms, Stratum: 2, Time since last sync: 15 minutes 39 seconds
Number of threads 402, Usage: 0.64%
OMD main Event Console Current events: 0, Virtual memory: 207 MiB, Overall event limit inactive, No hosts event limit active, No rules event limit active, Received messages: 0.00/s, Rule hits: 0.00/s, Rule tries: 0.00/s, Message drops: 0.00/s, Created events: 0.00/s, Client connects: 0.02/s, Rule hit ratio: -, Processing time per message: -, Time per client request: 0.75 ms
OMD main Notification Spooler Version: 2.4.0p8, Spooler running
OMD main apache No activity since last check
OMD main disk usage Total: 481 MiB, Agents: 60.1 MiB, Core: 1.07 MiB, History: 24.0 KiB, Inventory: 2.15 KiB, Local: 1.61 KiB, Logs: 7.57 MiB, PNP4Nagios: 83 B, RRDs: 401 MiB, Tmp: 718 KiB
OMD main performance Livestatus version: 2.4.0p8, Host checks: 0.9/s, Service checks: 2.0/s
OMD main status running
Postfix Queue default Deferred queue length: 0, Active queue length: 0
Postfix status default Status: the Postfix mail system is running, PID: 1863
Site main statistics Total hosts: 5, Problem hosts: 0, Total services: 104, Problem services: 4
Systemd Service Summary Total: 165, Disabled: 22, Failed: 0
Systemd Socket Summary Total: 16, Disabled: 3, Failed: 0
TCP Connections Established: 3
Uptime Up since 2025-09-12 15:58:52, Uptime: 5 days 17 hours
+ EXECUTING INVENTORY PLUGINS
allnet_ip_sensoric: skipped (no data)
allnet_ip_sensoric: skipped (no data)
check_mk: ok
check_mk: skipped (no data)
checkmk_agent_plugins: ok
checkmk_agent_plugins: skipped (no data)
aruba_wlc_aps: skipped (no data)
aruba_wlc_aps: skipped (no data)
dell_hw_info: skipped (no data)
dell_hw_info: skipped (no data)
docker_node_info: skipped (no data)
docker_node_info: skipped (no data)
hp_proliant_da_phydrv: skipped (no data)
hp_proliant_da_phydrv: skipped (no data)
hp_proliant_mem: skipped (no data)
hp_proliant_mem: skipped (no data)
hp_proliant_systeminfo: skipped (no data)
hp_proliant_systeminfo: skipped (no data)
ibm_mq_channels: skipped (no data)
ibm_mq_channels: skipped (no data)
fireeye_sys_status: skipped (no data)
fireeye_sys_status: skipped (no data)
ibm_mq_managers: skipped (no data)
ibm_mq_managers: skipped (no data)
ibm_mq_queues: skipped (no data)
ibm_mq_queues: skipped (no data)
win_disks: skipped (no data)
win_disks: skipped (no data)
win_exefiles: skipped (no data)
win_exefiles: skipped (no data)
infoblox_osinfo: skipped (no data)
infoblox_osinfo: skipped (no data)
win_ip_r: skipped (no data)
win_ip_r: skipped (no data)
win_networkadapter: skipped (no data)
win_networkadapter: skipped (no data)
infoblox_systeminfo: skipped (no data)
infoblox_systeminfo: skipped (no data)
inv_cisco_vlans: skipped (no data)
inv_cisco_vlans: skipped (no data)
lnx_block_devices: skipped (no data)
lnx_block_devices: skipped (no data)
inv_esx_vsphere_hostsystem: skipped (no data)
inv_esx_vsphere_hostsystem: skipped (no data)
inv_if: ok
inv_if: skipped (no data)
win_reg_uninstall: skipped (no data)
win_reg_uninstall: skipped (no data)
aix_baselevel: skipped (no data)
aix_baselevel: skipped (no data)
win_video: skipped (no data)
win_video: skipped (no data)
aix_lparstat_inventory: skipped (no data)
aix_lparstat_inventory: skipped (no data)
win_wmi_software: skipped (no data)
win_wmi_software: skipped (no data)
aix_packages: skipped (no data)
aix_packages: skipped (no data)
lnx_ip_r: skipped (no data)
lnx_ip_r: skipped (no data)
aix_service_packs: skipped (no data)
aix_service_packs: skipped (no data)
lnx_packages: skipped (no data)
lnx_packages: skipped (no data)
azure_load_balancer: skipped (no data)
azure_load_balancer: skipped (no data)
win_wmi_updates: skipped (no data)
win_wmi_updates: skipped (no data)
inventory_checkmk: ok
inventory_checkmk: skipped (no data)
lnx_sysctl: skipped (no data)
lnx_sysctl: skipped (no data)
checkpoint_vpn_tunnels: skipped (no data)
checkpoint_vpn_tunnels: skipped (no data)
lnx_video: skipped (no data)
lnx_video: skipped (no data)
citrix_controller: skipped (no data)
citrix_controller: skipped (no data)
citrix_state: skipped (no data)
citrix_state: skipped (no data)
mobileiron_inventory: skipped (no data)
mobileiron_inventory: skipped (no data)
couchbase_nodes_ports: skipped (no data)
couchbase_nodes_ports: skipped (no data)
dmidecode: skipped (no data)
dmidecode: skipped (no data)
kube_node: skipped (no data)
kube_node: skipped (no data)
lnx_if: ok
lnx_if: skipped (no data)
docker_container_labels: skipped (no data)
docker_container_labels: skipped (no data)
kube_namespace: skipped (no data)
kube_namespace: skipped (no data)
docker_container_network: skipped (no data)
docker_container_network: skipped (no data)
kube_pod: skipped (no data)
kube_pod: skipped (no data)
lnx_uname: skipped (no data)
lnx_uname: skipped (no data)
inventory_docker_container_node_name: skipped (no data)
inventory_docker_container_node_name: skipped (no data)
mssql_clusters: skipped (no data)
mssql_clusters: skipped (no data)
docker_node_images: skipped (no data)
docker_node_images: skipped (no data)
oracle_systemparameter: skipped (no data)
oracle_systemparameter: skipped (no data)
docker_node_network: skipped (no data)
docker_node_network: skipped (no data)
primekey: skipped (no data)
primekey: skipped (no data)
enviromux_micro_information: skipped (no data)
enviromux_micro_information: skipped (no data)
snmp_extended_info: skipped (no data)
snmp_extended_info: skipped (no data)
inventory_esx_vsphere_clusters: skipped (no data)
inventory_esx_vsphere_clusters: skipped (no data)
inventory_esx_vsphere_virtual_machines: skipped (no data)
inventory_esx_vsphere_virtual_machines: skipped (no data)
kube_statefulset: skipped (no data)
kube_statefulset: skipped (no data)
fortiauthenticator_system: skipped (no data)
fortiauthenticator_system: skipped (no data)
fortigate_ha: skipped (no data)
fortigate_ha: skipped (no data)
solaris_addresses: skipped (no data)
solaris_addresses: skipped (no data)
fortimail_system: skipped (no data)
fortimail_system: skipped (no data)
solaris_pkginfo: skipped (no data)
solaris_pkginfo: skipped (no data)
fortinet_firewall_network_interfaces: skipped (no data)
fortinet_firewall_network_interfaces: skipped (no data)
solaris_cpus: skipped (no data)
solaris_cpus: skipped (no data)
fortisandbox_software: skipped (no data)
fortisandbox_software: skipped (no data)
solaris_routes: skipped (no data)
solaris_routes: skipped (no data)
fortisandbox_system: skipped (no data)
fortisandbox_system: skipped (no data)
ipmi_firmware: skipped (no data)
ipmi_firmware: skipped (no data)
kube_cluster: skipped (no data)
kube_cluster: skipped (no data)
juniper_info: skipped (no data)
juniper_info: skipped (no data)
kube_cronjob: skipped (no data)
kube_cronjob: skipped (no data)
kube_daemonset: skipped (no data)
kube_daemonset: skipped (no data)
win_bios: skipped (no data)
win_bios: skipped (no data)
kube_deployment: skipped (no data)
kube_deployment: skipped (no data)
kyocera_printer: skipped (no data)
kyocera_printer: skipped (no data)
mem: ok
mem: skipped (no data)
perle_chassis: skipped (no data)
perle_chassis: skipped (no data)
perle_chassis_slots: skipped (no data)
perle_chassis_slots: skipped (no data)
perle_psmu: skipped (no data)
perle_psmu: skipped (no data)
lnx_cpuinfo: skipped (no data)
lnx_cpuinfo: skipped (no data)
lnx_distro: skipped (no data)
lnx_distro: skipped (no data)
lparstat_aix: skipped (no data)
lparstat_aix: skipped (no data)
mem_used: skipped (no data)
mem_used: skipped (no data)
prtconf: skipped (no data)
prtconf: skipped (no data)
snmp_quantum_storage_info: skipped (no data)
snmp_quantum_storage_info: skipped (no data)
suseconnect: skipped (no data)
suseconnect: skipped (no data)
snmp_info: skipped (no data)
snmp_info: skipped (no data)
solaris_prtdiag: skipped (no data)
solaris_prtdiag: skipped (no data)
solaris_uname: skipped (no data)
solaris_uname: skipped (no data)
win_computersystem: skipped (no data)
win_computersystem: skipped (no data)
win_computersystemproduct: skipped (no data)
win_computersystemproduct: skipped (no data)
win_cpuinfo: skipped (no data)
win_cpuinfo: skipped (no data)
win_os: skipped (no data)
win_os: skipped (no data)
win_system: skipped (no data)
win_system: skipped (no data)
winperf_if: skipped (no data)
winperf_if: skipped (no data)
fritz: skipped (no data)
fritz: skipped (no data)
cisco_meraki_org_device_info: skipped (no data)
cisco_meraki_org_device_info: skipped (no data)
cisco_meraki_power_supplies: skipped (no data)
cisco_meraki_power_supplies: skipped (no data)
mssql_instance: skipped (no data)
mssql_instance: skipped (no data)
netapp_ontap_disk: skipped (no data)
netapp_ontap_disk: skipped (no data)
netapp_ontap_info: skipped (no data)
netapp_ontap_info: skipped (no data)
oracle_dataguard_stats: skipped (no data)
oracle_dataguard_stats: skipped (no data)
oracle_instance: skipped (no data)
oracle_instance: skipped (no data)
oracle_performance: skipped (no data)
oracle_performance: skipped (no data)
oracle_recovery_area: skipped (no data)
oracle_recovery_area: skipped (no data)
oracle_tablespaces: skipped (no data)
oracle_tablespaces: skipped (no data)
redfish_firmware: skipped (no data)
redfish_firmware: skipped (no data)
redfish_firmware_hpe_ilo4: skipped (no data)
redfish_firmware_hpe_ilo4: skipped (no data)
robotmk: skipped (no data)
robotmk: skipped (no data)
esx_systeminfo: skipped (no data)
esx_systeminfo: skipped (no data)
Trying to acquire lock on /omd/sites/main/tmp/check_mk/status_data/<HOSTNAME>
Got lock on /omd/sites/main/tmp/check_mk/status_data/<HOSTNAME>
Releasing lock on /omd/sites/main/tmp/check_mk/status_data/<HOSTNAME>
Released lock on /omd/sites/main/tmp/check_mk/status_data/<HOSTNAME>
0 piggyback files for '<HOSTNAME>'.
[cpu_tracking] Stop [7f64e0e5bb90 - Snapshot(process=posix.times_result(user=0.040000000000000036, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.06000000238418579))]
[agent] Success, [piggyback] Success (but no data found for this host), execution time 1.4 sec | execution_time=1.410 user_time=0.050 system_time=0.000 children_user_time=0.000 children_system_time=0.000 cmk_time_agent=1.340
OMD[main]:~$
The host being checked here is my check_mk server itself.
I can’t find any evidence of a plugin for chrony:
<HOSTNAME>:~ # find /opt/omd/sites/main/share/check_mk/agents/plugins/ | grep chrony
<HOSTNAME>:~ #