Re: [ic] interchange.pid

[Mike Heins <suppressed>]

Quoting Brian Pribis (suppressed):
> Everyone
> 
> >
> >I haven't worked with Solaris for a number of years, as almost no one seems
> >to use it for web servers anymore.
> >
> >The underlying problem is with Perl and how it interacts with locking.
> >If using fcntl locking doesn't fix the problem -- as it did with later
> >Solaris installations back in 1999 or 2000 -- then probably nothing
> >is going to fix it.
> >
> >Note what you see if you search on google for "perl solaris lock".
> >
> 
> 
> 
> Help me understand this because I think I am missing something.
> 
> 
> If IC is already running, and I restart or stop it gets the PID and 
> can't seem to make the connection with the PID of the IC instance and so 
> complains (I have verified that the PID in the file is correct).
> 
> If IC is not already running, but the interchange.pid file exists, it 
> will also complain, but this is what it should do since there will be no 
>  IC running, hence no PID.
> 
> Once the second (third, forth, etc) instance of IC fires up it updates 
> the interchange.pid file and continues on its merry way without so much 
> as a complaint.
> 
> In other words, when I start interchange (not restart), it just plows 
> ahead and writes to the pid file.
> 
> Are you telling me that the file is not being locked by interchange and 
> so when it goes to shutdown it simply looks to see if it is locked and 
> complains without even looking in the file?

"Looking in the file"? I don't know what you can do about it if you
do look, as you can't know whether that PID is running.

> 
> If this is the case then why not change it so that it looks for the pid 
> for the user and the interch command and then does the compare?  If its 
> there then it is running and should be killed, if it isn't there there 
> then IC isn't running, or is this missing the point?
> 

Of course if you glue stuff together with shell commands, you can,
but if you were going to do that then you just write a shell script
to perform the startup / shutdown.

-- 
Mike Heins
Perusion -- Expert Interchange Consulting    http://www.perusion.com/
phone +1.765.647.1295  tollfree 800-949-1889 <suppressed>

Find the grain of truth in criticism, chew it, and swallow
it. -- anonymous
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