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    "System is overloaded, try again" for OPAC searches (due to clock change)

    • Article Type: General
    • Product: Aleph
    • Product Version: 20

    Problem Symptoms:
    * The message "System is overloaded, try again" occurs for OPAC searches.
    * "Error: License limit exceeded" is seen in the www_server log.

    Cause:
    As part of a reboot the server clock was incorrectly set forward 4 hours. After the server had been up for 8 hours, the clock was corrected (set back 4 hours). This caused z63 (OPAC session) records which had been inactive to be re-activated, causing the number of Active users (as seen in util y/11/2) to exceed the number of Licensed users.

    Resolution:
    Avoid changing the server time as part of a reboot. If the server time is inadvertently changed:
    * run aleph_shutdown;
    * correct the time;
    * run clear_vir01 (util x/8) cold (to avoid activating old session records);
    * run aleph_startup.

    Additional Information

    Note: the following lines, showing evidence of the server time change, were seen in the www_server log:
    2014-10-05 16:41:41 12 [002] [vrb] server_main: OUT 0.2277 11795
    2014-10-05 12:42:02 43 [000] [vrb] IN 20141005 124202 <---- time drops back 4 hours!

    For other causes, not involving server clock change, see Article 000009299 ("License limit exceeded or System is overloaded").

    Category: System Management (500)


    • Article last edited: 10/8/2014