Latest Troubleshooting topics

Topic	Replies	Views	Activity
Troubleshooting FAQ This is a Wiki topic for troubleshooting Checkmk. Feel free to contribute! Template for troubleshooting posts Here is the post template that you can use to make your issue clearer to everyone. Just edit out the sample p…	0	5152	October 31, 2019
About the Troubleshooting category	0	1809	September 26, 2019
2.5.0p14 SFTP check deprecated cipher ssh-rsa	0	2	October 1, 2026
Custom dashboard: graph time range resets after ~30 seconds (no pause icon) checkmk-raw , checkmk-v2 , dashboards	0	1	October 1, 2026
CMK 2.3p39, redfish 2.3.77 , Dell iDRAC fw 7.20.60.50 services keep vanishing /reappearing checkmk-appliance	7	132	October 1, 2026
Fragen zu Azure Anbindung azure	8	139	September 29, 2026
Unhandled exception: 400: Site connection not initiated ([Errno 104] Connection reset by peer) checkmk-enterprise , checkmk-v2-5	11	54	September 29, 2026
MSSQL in Windows Server Failover Cluster, can't find instances	6	210	September 28, 2026
Check MK does not user ORACLE Wallet	0	24	September 28, 2026
Missing Services within Wato	8	60	September 28, 2026
Checkmk 2.5: win_exefiles parsing fails with German locale (mk_inventory.ps1) checkmk-enterprise	1	48	September 25, 2026
"Login session idle timeout" missing checkmk-v2-2	2	35	September 24, 2026
Crash (ValueError) in keepalived module after updating to 2.5.0p14	2	39	September 24, 2026
Agent exited with code 1: could not convert string to float: '' checkmk-raw	2	121	September 24, 2026
Windows Host with checkmk agent -2.3.0p46 gets only piggyback data	2	17	September 23, 2026
Maximum number of check attempt for Host VS Settings for host checks via Smart PING checkmk-v2-1	8	47	September 22, 2026
REST API: 500 on every Bearer-auth request with LDAP-backed user (2.5.0p12) ldap , rest-api , web-api	5	98	September 21, 2026
Host not always up problem after bulk service discovery checkmk-raw , host-label	1	29	September 18, 2026
Self written checks are ignored by GUI but working on CLI	2	33	September 18, 2026
Network Scan occasionally adds "ghost" hosts that never respond to ICMP (race condition in _ping_worker / _ping) bug	0	36	September 18, 2026
Login with Azure button stopped working checkmk-enterprise , azure , checkmk-v2 , ldap , checkmk-v2-5	0	31	September 17, 2026
"Disabled services" rule causes massive "Unimplemented check ... service could not be found" warnings flooding nagios.log (Nagios core) checkmk-raw , checkmk-v2-5	4	132	September 14, 2026
Testing CMK 2.5 - Windows host agent extremely slow checkmk-enterprise	4	92	September 14, 2026
Rittal CMC Checks vanish after update to 2.5	5	63	September 14, 2026
Filter on Host/Service Service Level ignored	8	102	September 14, 2026
Dell idrac 10 snmp problem checkmk-enterprise , checkmk-v2	4	67	September 11, 2026
Agent Plugin: Missing Data for Veeam Jobs checkmk-enterprise , checkmk-v2-2	22	587	September 11, 2026
Suche nach Hosttags in 2.5	1	50	September 10, 2026
Capturing vs. non-capturing groups in process discovery	1	55	September 10, 2026
Checks appearing where they shouldnt checkmk-appliance	18	249	September 9, 2026

Troubleshooting FAQ

This is a Wiki topic for troubleshooting Checkmk. Feel free to contribute! Template for troubleshooting posts Here is the post template that you can use to make your issue clearer to everyone. Just edit out the sample p…