You can use the -directory switch on the glob command to achieve the same
thing.
Pete.
From: Jim Wilcoxson <[EMAIL PROTECTED]>
Reply-To: AOLserver Discussion <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Re: [AOLSERVER] problems
Date: Wed, 13 Nov 2002 09:20:49 -0800
The "cd" TCL command does not work in AOLServer, because all threads share
the same
working directory. When executed in multiple threads simulataneously, you
have a
race condition.
We do this in _init.tcl, the first modules we load with AS:
rename cd {}
That disables the cd command altogether, which is what you want, because it
doesn't
work.
Jim
>
> Hi.
>
> I've been experiencing a couple of problems with AOLServer. Running
> apachebench with a concurrency of 2 or more would eventually cause
> AOLServer to crash on this script:
>
> <%
> cd /usr/local/aol32/servers/server1/pages/newspapers/cache/169/
> puts [glob -nocomplain "1_*.js"]
> %>
>
> Strangely, when I shorten the directory that it is cd'ing to, it doesn't
> crash.
>
> Also, when running this script under load, AOLServer crashes with the
> following tcl error (which appears in generic/tclObj.c):
>
> <%
> cd /usr/local/aol32/servers/server1/pages/newspapers/cache/169/
> puts [pwd]
> %>
>
> UpdateStringProc should not be invoked for type cmdName
>
> I'm also getting the following error in production (can't reliably
> reproduce it) (though I'm not sure that the two are related, as the
> first stopped when I rewrote the relevant code to avoid use of glob
> (though if 'cd' is the problem...)):
> alloc: invalid block: 0x40100d94: 3c 40 0
>
> Sometimes it will run for hours without crashing; other times it will
> crash twice in a 5-minute period (all while under fairly significant
> load). It's almost always the same memory address, if that provides any
> additional insight.
>
> Thanks for any ideas you can provide.
>
> seth
>
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