From: Brian Candler <B.Candler@...>
Date: 2003-04-09T03:09:01+09:00
Subject: Re: Problem with timeout for DBI on Solaris

On Wed, Apr 09, 2003 at 01:48:33AM +0900, Daniel Berger wrote:
> eval{
>    alarm(5);
>    $dbh = DBI->connect("dbi:Oracle:$db",$login,$passwd,{
>       RaiseError => 1, PrintError => 1});
>    alarm(0);
> };
...
> This was the result:
> 
> "Error: DBI->connect(db) failed: ORA-12560: TNS:protocol adapter error
> (DBD ERROR: OCIServerAttach)"

After 5 seconds?

It could also be a signal-handling issue. Ruby installs its own signal
handlers for a bunch of common signals, and installs them with SA_RESTART
set so that system calls don't terminate prematurely with EINTR if a signal
comes along. If you change a signal handler with trap() {..} Ruby just
updates its internal data structures, it doesn't touch the handlers it
installed.

Maybe perl just installs signal handlers in the O/S when required, which may
mean in this case EINTR is sufficient to terminate the connection attempt.

I had the same issue when looking at fcgi and Apache sending a SIGUSR1 to a
fastcgi process to do a 'clean shutdown'

Regards,

Brian.