CMK version: Cloud 2.4.0p13
OS version: Server: Ubuntu 24.04 Client: Windows Server 2019 and 2022
Error message: Version: 2.4.0p13, OS: windows, Update error: Agent Bakery: This host is not registered for deploymentWARN, Time since last update check: 7 days 17 hours (warn/crit at 2 days 0 hours/never)WARN, Last update: 2025-11-24 15:00:51, Agent plug-ins: 2, Local checks: 0
Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins)
value store: loading from disk
Checkmk version 2.4.0p13
- FETCHING DATA
Source: SourceInfo(hostname=‘Server_Name’, ipaddress=‘’, ident=‘agent’, fetcher_type=<FetcherType.TCP: 8>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7edb7e853830]
Read from cache: AgentFileCache(path_template=/omd/sites/Domain_Name/tmp/check_mk/cache/Server_Name, 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 43 sec, allowed is 0 sec)
Connecting via TCP to :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 :6556
Write data to cache file /omd/sites/Domain_Name/tmp/check_mk/cache/Server_Name
Trying to acquire lock on /omd/sites/Domain_Name/tmp/check_mk/cache/Server_Name
Got lock on /omd/sites/Domain_Name/tmp/check_mk/cache/Server_Name
Releasing lock on /omd/sites/Domain_Name/tmp/check_mk/cache/Server_Name
Released lock on /omd/sites/Domain_Name/tmp/check_mk/cache/Server_Name
[cpu_tracking] Stop [7edb7e853830 - Snapshot(process=posix.times_result(user=0.010000000000000009, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.7999999998137355))]
Source: SourceInfo(hostname=‘Server_Name’, ipaddress=‘’, ident=‘piggyback’, fetcher_type=<FetcherType.PIGGYBACK: 4>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7edb7e9a0bc0]
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)
1 piggyback files for ‘Server_Name’.
Read piggyback file ‘/omd/sites/Domain_Name/tmp/check_mk/piggyback/Server_Name/vcenter’
0 piggyback files for ‘’.
Get piggybacked data
[cpu_tracking] Stop [7edb7e9a0bc0 - Snapshot(process=posix.times_result(user=0.0, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.009999999776482582))]
[cpu_tracking] Start [7edb7e9a2930] - PARSE FETCHER RESULTS
<<<check_mk>>> / Transition NOOPParser → HostSectionParser
<<<cmk_agent_ctl_status:sep(0)>>> / Transition HostSectionParser → HostSectionParser
<<<wmi_cpuload:sep(124)>>> / Transition HostSectionParser → HostSectionParser
<<fileinfo:sep(124)>> / Transition HostSectionParser → HostSectionParser
<<>> / Transition HostSectionParser → HostSectionParser
<<>> / Transition HostSectionParser → HostSectionParser
<<df:sep(9)>> / Transition HostSectionParser → HostSectionParser
<<<winperf_phydisk>>> / Transition HostSectionParser → HostSectionParser
<<<winperf_if>>> / Transition HostSectionParser → HostSectionParser
<<<winperf_processor>>> / Transition HostSectionParser → HostSectionParser
<<>> / Transition HostSectionParser → HostSectionParser
<<<checkmk_agent_plugins_win:sep(0)>>> / Transition HostSectionParser → HostSectionParser
<<>> / Transition HostSectionParser → HostSectionParser
<<<dotnet_clrmemory:sep(124)>>> / Transition HostSectionParser → HostSectionParser
<<ps:sep(9)>> / Transition HostSectionParser → HostSectionParser
Transition HostSectionParser → NOOPParser
<<<cmk_update_agent_status:cached(1764711004,86400):sep(0)>>> / Transition NOOPParser → HostSectionParser
<<<win_netstat:cached(1764771644,300)>>> / Transition HostSectionParser → HostSectionParser
Transition HostSectionParser → NOOPParser
<<>> / Transition NOOPParser → HostSectionParser
<<<esx_vsphere_vm:cached(1764771737,90)>>> / Transition NOOPParser → HostSectionParser
<<<esx_vsphere_objects:cached(1764771737,90):sep(9)>>> / Transition HostSectionParser → HostSectionParser
<<<piggyback_source_summary:sep(0)>>> / Transition HostSectionParser → HostSectionParser
<<labels:sep(0)>> / Transition HostSectionParser → HostSectionParser
HostKey(hostname=‘Server_Name’, source_type=<SourceType.HOST: 1>) → Add sections: [‘check_mk’, ‘checkmk_agent_plugins_win’, ‘cmk_agent_ctl_status’, ‘cmk_update_agent_status’, ‘df’, ‘dotnet_clrmemory’, ‘fileinfo’, ‘logwatch’, ‘mem’, ‘ps’, ‘services’, ‘systemtime’, ‘uptime’, ‘win_netstat’, ‘winperf_if’, ‘winperf_phydisk’, ‘winperf_processor’, ‘wmi_cpuload’]
HostKey(hostname=‘Server_Name’, source_type=<SourceType.HOST: 1>) → Add sections: [‘esx_vsphere_objects’, ‘esx_vsphere_vm’, ‘labels’, ‘piggyback_source_summary’]
Received no piggyback data
CPU utilization Total CPU: 0%
Check_MK Agent Version: 2.4.0p13, OS: windows, Update error: Agent Bakery: This host is not registered for deployment(!), Time since last update check: 7 days 17 hours (warn/crit at 2 days 0 hours/never)(!), Last update: 2025-11-24 15:00:51, Agent plug-ins: 2, Local checks: 0
Disk IO SUMMARY Read: 0.00 B/s, Write: 23.5 kB/s, Latency: 465 microseconds
DotNet Memory Management Global Time in GC: 0%
ESX CPU demand is 0.168 Ghz, 4 virtual CPUs
ESX Datastores Stored on ESX-CORE-ISCSI-MO-007 (5.00 TiB/26.3% free)
ESX Guest Tools VMware Tools are installed and the version is current
ESX Heartbeat Heartbeat status is green
ESX Hostsystem Running on esxm7.Domain_Name
ESX Memory Host: 10.8 GiB, Guest: 655 MiB, Ballooned: 0 B, Private: 10.7 GiB, Shared: 2.75 GiB
ESX Mounted Devices HA functionality guaranteed
ESX Name Server_Name
ESX Snapshots Count: 0
Filesystem C:/ Used: 24.25% - 21.8 GiB of 89.9 GiB, trend per 1 day 0 hours: -123 MiB, trend per 1 day 0 hours: -0.13%
Interface 1 [vmxnet3 Ethernet Adapter], (up), MAC: 00:50:56:98:C9:B9:00:00, Speed: 10 GBit/s, In: 1.20 kB/s (<0.01%), Out: 642 B/s (<0.01%)
Log Application 1 WARN messages (Last worst: “Dec 02 17:11:08 32768.4879 MSDTC_Client_2 80000171 Server_Name”)
Log HardwareEvents No error messages
Log Internet Explorer No error messages
Log Key Management Service No error messages
Log Security 17 CRIT messages (Last worst: “Dec 02 15:56:47 0.4656 Microsoft-Windows-Security-Auditing A handle to an object was requested. Subject: Security ID: S-1-5-21-2644809459-2215359211-3944440665-35896 Account Name: s.ikitchen Account Domain: Domain_Name Logon ID: 0x67c2c710 Object: Object Server: Security Object Type: File Object Name: C:\Windows\System32\services.msc Handle ID: 0x0 Resource Attributes: - Process Information: Process ID: 0x28a8 Process Name: C:\Windows\System32\mmc.exe Access Request Information: Transaction ID: {00000000-0000-0000-0000-000000000000} Accesses: %%1538 %%1541 %%4417 %%4418 %%4420 %%4423 %%4424 Access Reasons: %%1538: %%1801 D:(A;;0x1200a9;;;BA) %%1541: %%1801 D:(A;;0x1200a9;;;BA) %%4417: %%1805 %%4418: %%1805 %%4420: %%1805 %%4423: %%1811 D:(A;;0x1301bf;;;BA) %%4424: %%1805 Access Mask: 0x120196 Privileges Used for Access Check: - Restricted SID Count: 0”)
Log System 2 WARN messages (Last worst: “Dec 02 17:11:16 32772.157 disk Disk 1 has been surprise removed.”)
Log Windows PowerShell No error messages
Memory RAM: 17.88% - 2.86 GiB of 16.0 GiB, Virtual memory: 11.50% - 2.17 GiB of 18.9 GiB
Object count Templates: 0, Virtualmachines: 1
Processor Queue 15 min load: 0.00, 15 min load per core: 0.00 (4 logical cores)
Service Summary Autostart services: 63, Stopped services: 3
System Time Offset: -461 milliseconds
Uptime Up since 2025-11-05 16:06:40, Uptime: 27 days 16 hours
VM Server_Name.Domain_Name power state: poweredOn, running on [esxm7.Domain_Name]
[cpu_tracking] Stop [7edb7e9a2930 - Snapshot(process=posix.times_result(user=0.020000000000000018, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.009999999776482582))]
[agent] Success, [piggyback] Successfully processed from source ‘vcenter’, execution time 0.8 sec | execution_time=0.820 user_time=0.030 system_time=0.000 children_user_time=0.000 children_system_time=0.000 cmk_time_agent=0.800
A week ago CheckMK decided to delete every server that had been added to it, both Linux and Windows Servers. After working with CheckMK, and discovering and resolving the issue, I began working on readding the servers back in starting with my WIndows Servers.
I have added 427 servers, and noticed today that about 123 servers are giving this error: This host is not registered for deployment**.** When I look in Setup → Agents → Windows, Linux, Solaris, AIX, I see the server listed under available agent configurations.
Does anybody have any suggestions on what is causing this? I have deleted the agent, and reinstalled the agent. I have reregistered the agent, stopped and restarted the service.