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Re: postgres startup failure

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On Thu, May 20, 2010 at 3:36 PM, Tom Lane <tgl@xxxxxxxxxxxxx> wrote:
Matt Bartolome <mattxbart@xxxxxxxxx> writes:
> Setting the breakpoint (b exit) got me a little farther...

> DEBUG:  invoking IpcMemoryCreate(size=32595968)
> DEBUG:  max_safe_fds = 980, usable_fds = 1000, already_open = 10
> Detaching after fork from child process 19066.
> Detaching after fork from child process 19067.

> Breakpoint 1, 0x0046efb6 in exit () from /lib/libc.so.6
> (gdb) bt
> #0  0x0046efb6 in exit () from /lib/libc.so.6
> #1  0x082286de in proc_exit ()
> #2  0x0820bbdf in ?? ()
> #3  0x0820eb63 in ?? ()
> #4  <signal handler called>
> #5  0x003ec424 in __kernel_vsyscall ()
> #6  0x0051433d in ___newselect_nocancel () from /lib/libc.so.6
> #7  0x0820d489 in ?? ()
> #8  0x08210489 in PostmasterMain ()
> #9  0x081b92df in main ()

Hmm.  Not tremendously helpful --- if you were to install the
appropriate postgresql-debuginfo RPM, the stack trace might get
more useful.  However, this does appear to confirm the theory
that postmaster.c is doing proc_exit(1), and I don't see any code
paths in there where there isn't a error message logged first.
So right now I'm wondering whether you're not failing to notice
a relevant log message(s).  You've evidently managed to launch
the syslogger --- where is it configured to write the postmaster
log?


Gosh, you know I never even bothered looking in pg_log. Stupid! I was expecting to see some sort of error when doing:
$ postgres -d 3 -D /data/postgres/

I even have this written down in my own recovery instructions:

4. Create pg_xlog directory as postgres user, remove backup_label

I had forgotten when doing a backup with WAL enabled you want to exclude the pg_xlog directory because you are restoring from the WAL's written on the standby server in the event of failure. In the pg_log it clearly prints the error.
 
                       regards, tom lane

Thanks Tom, I probably would have been running in circles for days without your help.

-Matt

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