Field Notice: FN - 70121 - Cisco Identity Services Engine - Temporary Logwatch Log Files Might Not Be Removed and Might Impact System Performance - Software Upgrade Recommended

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Updated:February 5, 2018

Document ID:FN70121

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Notice

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Revision History

Revision	Publish Date	Comments
1.0	05-Feb-18	Initial Release

Products Affected

Affected OS Type	Affected Release	Affected Release Number	Comments
NON-IOS	2	2.0.1, 2.0, 2.2.0, 2.1.0

Defect Information

Defect ID	Headline
CSCvc74307	ISE /var/cache/logwatch temp files are not removed

Problem Description

A Cisco Identity Services Engine (ISE) node where the root (/) partition is filled might not allow the admin access through an SSH or console connection. In addition, the ISE node might not be able to join an Active Directory or end users might not be able to establish a new authentication session. Subject to the persona of the node (that is, PAN/MnT/PxGrid/PSN), the impact can be local to the node or the entire deployment.

Background

The Linux Logwatch utility generates logs available from /var/log, each of which is 2MB in size. The logs are not properly deleted, which occupies free space in the root partition, and eventually causes the root partition to run out of space.

Problem Symptom

ISE generates an alarm, similar to this example, which can be viewed through the admin GUI.

Alarm Title:

The ISE system is experiencing High Disk Space Utilization

Alarm Text:

Check if the system has sufficient resources, Check the actual amount of work on the system for 
example, no of authentications, profiler activity etc.., Add additional server to distribute 
the load

CLI system message seen upon log in:

"Unable to launch ADE-OS shell. Disk full."

Workaround/Solution

In order to fix this problem, upgrade or patch to these ISE software versions:

ISE 2.0 Patch 5 or later
ISE 2.1 Patch 5 or later
ISE 2.2 Patch 1 or later
ISE 2.3 or later

If this error occurs when an attempt is made to apply a patch in the administration web user interface, then the ISE root partition is already full and cannot proceed with the patch installation. For further assistance, contact the Cisco Technical Assistance Center (TAC).

Administration Web User Interface Error

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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