core from a running process

[cdoerbec at cso.fmr.com (Christoph Doerbeck A242369)]

How about using 'strace' to see what the application is doing.  It's my
favorite first line of defense (offense?).



FRamsay at castelhq.com wrote:
> 
> Not responding means the application stop processing requests.  The TCP
> connections
> remain intact and it is still using CPU time (it seems like the same amount
> as during normal
> running).  Thanks for the SIGABRT command btw, I guess I could kill the
> process to get the
> core since the client needs to restart the application anyway...
> 
> 
>                          -fjr
> 
> Frank Ramsay
> Systems Programmer
> Castel, Inc
> 14 Summer St, 3rd Floor
> Malden, MA 02148
> (781) 324-0140 (voice)
> (781) 324-0277 (fax)
> Emal: framsay at castel.com
> 
> 
>                                                                              
>                                                                          
>                     Nathan Meyers                                            
>                                                                          
>                     <nmeyers at java        To:     FRamsay at castelhq.com        
>                                                                          
>                     linux.net>           cc:     discuss at blu.org             
>                                                                          
>                     Sent by:             Subject:     Re: core from a running
>  process                                                                 
>                     discuss-admin                                            
>                                                                          
>                     @blu.org                                                 
>                                                                          
>                                                                              
>                                                                          
>                                                                              
>                                                                          
>                     09/03/2002                                               
>                                                                          
>                     09:36 AM                                                 
>                                                                          
>                                                                              
>                                                                          
> 
> 
> 
> On Tue, Sep 03, 2002 at 09:09:01AM -0400, FRamsay at castelhq.com wrote:
> > Does anyone know of a way to get a core from a running process without
> > crashing the process?  I have a process
> > that occasionally stops responding but doesn't actually crash.  Worse
> this
> > only happens at one client site and
> > I can't reproduce it in the office, so I can't attach dbg to it.  To
> > complicate matters the application spawns several
> > other processes so I don't know which one is causing the problem :(
> So
> > does anyone know a very simple way I
> > can get core file, and it has to be _very_ simple because I have to talk
> > the client through it over the phone.
> 
> I don't *think* you can get there, but I'd be happy to be proven wrong.
> If you're willing to bring the process down, sending it a SIGABRT (kill
> -ABRT) will generate a corefile IF the process is running in a directory
> to which it has write access.
> 
> When you say "stops responding", what sort of response stops working?
> Does a GUI freeze? Does a server stop accepting network connections?
> Something else? That info might generate some useful suggestions.
> 
> Nathan Meyers
> nmeyers at javalinux.net
> 
> 
> >
> >                          -fjr
> >
> >
> > Frank Ramsay
> > Systems Programmer
> > Castel, Inc
> > 14 Summer St, 3rd Floor
> > Malden, MA 02148
> > (781) 324-0140 (voice)
> > (781) 324-0277 (fax)
> > Emal: framsay at castel.com
> >
> >
> > _______________________________________________
> > Discuss mailing list
> > Discuss at blu.org
> > http://www.blu.org/mailman/listinfo/discuss
> 
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