Re: defunct postmasters

Hi

Once more, this time with feeling :)
Sorry, not a regular user of gdb, but I figured out my error, does this
help?

Anything else before kill -9?

thanks,
PHilip

# gdb postmaster 29214
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This GDB was configured as "i386-redhat-linux"...

/usr/local/pgsql/bin/29214: No such file or directory.
Attaching to program: /usr/local/pgsql/bin/postmaster, Pid 29214
Reading symbols from /lib/libcrypt.so.1...done.
Reading symbols from /lib/libresolv.so.2...done.
Reading symbols from /lib/libnsl.so.1...done.
Reading symbols from /lib/libdl.so.2...done.
Reading symbols from /lib/libm.so.6...done.
Reading symbols from /lib/libc.so.6...done.
Reading symbols from /lib/ld-linux.so.2...done.
Reading symbols from /lib/libnss_files.so.2...done.
0x4013da02 in __libc_accept () from /lib/libc.so.6
(gdb) bt
#0 0x4013da02 in __libc_accept () from /lib/libc.so.6
#1 0x80c34b9 in StreamConnection ()
#2 0x80e07b1 in ConnCreate ()
#3 0x80e0239 in ServerLoop ()
#4 0x80dfdb3 in PostmasterMain ()
#5 0x80c3fa5 in main ()
#6 0x400a39cb in __libc_start_main (main=0x80c3ec0 <main>, argc=4,
argv=0xbffffb14, init=0x80651d0 <_init>,
fini=0x813697c <_fini>, rtld_fini=0x4000ae60 <_dl_fini>,
stack_end=0xbffffb0c) at ../sysdeps/generic/libc-start.c:92
(gdb) info frame
Stack level 0, frame at 0xbffff400:
eip = 0x4013da02 in __libc_accept; saved eip 0x80e07b1
(FRAMELESS), called by frame at 0xbffff400
source language unknown.
Arglist at 0xbffff400, args:
Locals at 0xbffff400, Previous frame's sp is 0x0
Saved registers:
ebp at 0xbffff400, eip at 0xbffff404
(gdb)

On Fri, 11 May 2001, Tom Lane wrote:

> Philip Crotwell <crotwell(at)seis(dot)sc(dot)edu> writes:
> > I am running postgres7.1 on redhat 6.2 and my database has gone belly up.
>
> > I know i am not supposed to "kill -9 " the postmaster, but it has become
> > completely unresponsive. pgsql just hangs as does stopping with the
> > rc.d script.
>
> Actually, kill -9 should be perfectly safe in PG 7.1; it was only
> earlier releases that didn't like it. But before you do that,
> would you attach to the top postmaster process (29214) with gdb
> and get a stack trace?
>
> > PS I don't know why this happened, but the only theory I have is that I am
> > running with -i to allow jdbc connections and I had port scanned the
> > machine with nmap shortly before noticing that I could no longer connect.
>
> Hmm, would you see if that's repeatable?
>
> regards, tom lane
>
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