Last Modified: Jan 09, 2025
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2
Opened: Oct 10, 2022 Severity: 3-Major
When the coloradvisory probes generated by Javascript loaded on the browser do not get responded by the BIG-IP device within 30 seconds, the browser JS generates a pop-up message "Unable to contact BIG-IP device".
Browser frequently sees the BIG-IP as unavailable, causing interruptions to management of the device via the GUI.
- MCPD is busy serving requests. - Multiple browser connections to the BIG-IP. - HTTP GET request from browser JS for /xui/update/configuration/alert/statusmenu/coloradvisory does not get responded within 30 seconds (default timeout).
1. Increase memory allocated to tomcat and restjavad. tmsh modify sys db provision.tomcat.extramb value 512 tmsh modify sys db provision.restjavad.extramb value 2227 NB these are very large values, not suitable for most systems. It is probably best to increase tomcat heap size by 50MB a time, and restjavad by 200MB a time (value 600, 800, etc). To have provision.restjavad.extramb values will be capped in effect to 384 + value of provision.extramb. Both tomcat and restjavad need to be restarted to have changes take effect. restjavad will log startup info in ltm log. 2. Adjust the browser-based Javascript status update interval and timeout. 2.1. Remount /usr partition as read-write using the command: mount -o remount,rw /usr 2.2. Edit the file /usr/local/www/xui/framework/scripts/variables.js, and modify the variables: time_updateXui to 8, and timeout_status to 60. Default values are: var time_updateXui = 5; // Seconds var timeout_status = 30; //Timeout value for XUI status update Change these values to: var time_updateXui = 8; // Seconds var timeout_status = 60; //Timeout value for XUI status update 2.3. Remount /usr partition back to read-only. mount -o remount,ro /usr 3. Restart associated daemons: bigstart restart httpd bigstart restart tomcat bigstart restart restjavad
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