Thanks everyone - that did the trick!

Nice work to the people who tracked that down - quite a thread!!

On 10/19/06, Dave Siktberg <[EMAIL PROTECTED]> wrote:
Here is the message from five months ago that helped me get this fixed on my
3.x system:


Forum: OpenACS Q&A
Thread: ad_schedule_proc seems to be failing
Author: Michael A. Cleverly
Posted: 2006-05-23 12:53:52.861061-07

Let me try and explain:
During AOLserver startup, if MaxOpen or MaxIdle is a positive number (not
zero which means "forever") then AOLserver schedules a job to check to reset
the database connections at [expr [clock seconds] + $MaxOpen] (as it were).

After May 12, 2006, the current time since the beginning of the epoch, plus
a MaxIdle/MaxOpen setting of 1 billion seconds resulted in a scheduled event
that overflowed a 32-bit signed integer. (It wrapped around and became a
negative value.)

From what I gather from the AOLserver list, on Solaris this leads to a hard
crash in some pthread function call. On Linux it just seems to forever hang
up processing of scheduled events (because it can't cope with a negative
time and every negative number is less than any positive number).

On Linux people who don't have MaxIdle or MaxOpen set at 1000000000 or who
haven't restarted AOLserver since May 12th won't have experienced the
problem. (For someone with a 1 billion setting who last restarted on May
11th then AOLserver is scheduled to reset the database connections in
mid-January 2038 right now...)

A setting of 100 million, instead of 1 billion, wouldn't have exposed this
condition on AOLserver 3.x for another twenty-eight years or so. Zero is the
right value to use now. (Apparently 1 billion was chosen, instead of zero,
due to some bug in the Oracle driver or the Oracle client libraries... 1
billion being "effectively" forever... until this month!)


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Mark Aufflick
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