The CallManagerFailure alarm reports an internal failure in the Cisco CallManager service with reason codes 1 Unknown, 2 HeartBeatStopped, 3 RouterThreadDied, 4 TimerThreadDied and 5 CriticalThreadDied; the service should restart to clear the failure.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- alarms
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 8.5(1) per source
- Checked
- 2026-10-02
Sources
- System Error Messages for Cisco Unified Communications Manager 8.5(1) — Cisco Systems · tier 2 current vendor documentation · CallManagerFailure alarm entry
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting high CPU and service crashes in Unified CM: source note cucm-high-cpu-troubleshooting-ccmfailure-reason-codes. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-high-cpu-troubleshooting-ccmfailure-reason-codes
BibTeX
@misc{warmtransfer-claim-cucm-high-cpu-troubleshooting-ccmfailure-reason-codes,
title = {Troubleshooting high CPU and service crashes in Unified CM: source note cucm-high-cpu-troubleshooting-ccmfailure-reason-codes},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-high-cpu-troubleshooting-ccmfailure-reason-codes},
note = {Source note cucm-high-cpu-troubleshooting-ccmfailure-reason-codes, checked 2026-10-02}
}