Problem with escalator

[nelsonab]

Recently something happened on my 1.5.3 test system which cause the escalator to go nuts. Ever since then I've been running with 100% cpu utilization and at least 1.8 processor load.

I thave tracked down the bug to the escalator code which determines the sleep time.


src/zabbix_server/escalator/escalator.c:694-704

[B]    nextcheck = get_minnextcheck();

    if (FAIL == nextcheck)
      sleeptime = CONFIG_ESCALATOR_FREQUENCY;
    else {
      sleeptime = nextcheck - time(NULL);
      if (sleeptime < 0)
        sleeptime = 0;
      else if (sleeptime > CONFIG_ESCALATOR_FREQUENCY)
        sleeptime = CONFIG_ESCALATOR_FREQUENCY;
    }
[/B]

If get_minnextcheck returns 0 then the main escalator loop will never sleep and then go back to thrashing the MySQL database. Here is the change I made:


src/zabbix_server/escalator/escalator.c:700-701

if (sleeptime < 1)  /* ensure we always sleep at least one second */
  sleeptime = 1;

There also seem to be some other errors in the code. When I changed the table which get_minnextcheck calls to be at least 1 second it would never change it's update interval in the debug log output.

My server load level is at a very nice and healthy 0.09 now.

Added as ZBX-405

[Alexei]

Thanks for reporting this!

[Sasha]

Thank you!
Problem is fixed in rev. 5860.

[ataylo13]

Excellent! I am downloading now.

What was the issue? I have been running 1.5.3 since it was released and just yesterday zabbix blew up and started alerting on everything saying no data has been received, but all of the items values were updating.