Field Notice: FN74385 - Cisco Identity Services Engine – Live Logs Not Displaying Properly Due to Fast Expansion of MnT Database - Software Upgrade Recommended

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Updated:May 11, 2026
Document ID:FN74385

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Medium
Impact Rating:
Medium
First Published:
2026-May-11
Last Published:
2026-May-11
Revision:
1.0
Cisco Bug IDs:

Notice

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Products Affected


Affected Software Product Affected Release Affected Release Number Comments
Identity Services Engine System Software 3.3 3.3 Patch 8, 3.3 Patch 9  
Identity Services Engine System Software 3.4 3.4 Patch 1, 3.4 Patch 2, 3.4 Patch 3, 3.4 Patch 4  
Identity Services Engine System Software 3.5 3.5 Patch 1, 3.5.0  

Defect Information


Defect IDHeadline
CSCws61409Live Logs Not Displaying on GUI Due to Fast Expansion of MNT Database

Problem Description


Due to a change in the Cisco Identity Services Engine (ISE) system software database implementation, the Monitoring and Troubleshooting (MnT) tables may grow too quickly. This condition can disrupt logging services like RADIUS, TACACS Live Logs, and Live Sessions, Reports, Dashboards.

This defect impacts regular and dedicated MnT nodes.


Background


Multiple MnT tables were migrated to a SQL loader using direct path loading to improve performance. While this improved throughput, the change resulted in allocating table space above the expected threshold, which leads to uneven space utilization and segment-level fragmentation, eventually exhausting available table space and triggering allocation failures.


Problem Symptom


For features that rely on the internal Cisco ISE logging system, the following symptoms may be observed:

  • RADIUS and TACACS+ Livelogs shows No Data Available
  • RADIUS and TACACS+ LiveSessions shows No Data Available
  • Reports and Health summary does not display
  • Log Collection Error alarms appear in ISE Home Page > Alarms Dashlet. The following image shows the error as it appears in the Alarms Dashlet:

To confirm whether the Cisco ISE system software is impacted by this issue, perform the following steps:

  1. Access the Primary MnT node CLI.
  2. Use the command show logging application collector.log | include "ORA-01658".

If the Cisco ISE system software is impacted by this issue, the following error displays:

ERROR [IMS System AcsSyslog store][[]] cisco.mnt.collection.syslog.AcsSyslogCollectionFailure -::::::- SQLException sent to the Collection Failure Alarm by Collector: java.sql.SQLException: java.sql.SQLException: ORA-01658: unable to create INITIAL extent for segment in tablespace MNTNS


Workaround/Solution


Solution 

To resolve this issue, upgrade Cisco ISE to one of the following releases:

Affected Cisco ISE Release First Fixed Release
3.3 3.3 Patch 10
3.4 3.4 Patch 5
3.5 3.5 Patch 2

 


Revision History


VersionDescriptionSectionDate
1.0Initial Release—2026-MAY-11

For More Information

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