Re: SQL command to dump the contents of table failed: PQendcopy() - Mailing list pgsql-general

Thanks Tom and Michael:

Michael Fuhr wrote:

> On Fri, Sep 23, 2005 at 05:11:19PM +0200, ruben wrote:
>
>>The operating system is Red Hat Linux release 8.0 (Psyche) and
>>PostgreSQL version is 7.4.6., without non-standard extensions.
>>
>>I cannot find any core dump in the PGDATA directory /usr/local/pgsql (I
>>don't know how to debug it to get a stack trace, I'll find out).
>
>
> Did you look everywhere under $PGDATA or just in that directory?
> As I recall, released versions of PostgreSQL usually dump core under
> $PGDATA/base/<database oid>.  However, it's also possible that your
> coredumpsize resource limit prevents core dumps; you could fix that
> by putting a command like "ulimit -c unlimited" in your PostgreSQL
> startup script and then stopping and restarting PostgreSQL.
>
> Once you have a core dump, you can get a stack trace with gdb:
>
> $ gdb /path/to/postgres /path/to/core
> ...
> (gdb) bt
>
> If your postgres binary was built with debugging symbols then the
> stack trace should show function names, file names, and line numbers.

I cannot find a core file, ulimit is set to unlimit. I guess I'm doing
something wrong:

-bash-2.05b$ ulimit
unlimited
-bash-2.05b$ find /usr/local/pgsql -name '*core*' -print
-bash-2.05b$


> Can you duplicate the backend crash from psql if you issue the COPY
> command that pg_dump complained about?

-bash-2.05b$ /usr/local/pgsql/bin/pg_dump -Fc -t llamadas heos -f
/home/buheos/5/llamadas3.dump
pg_dump: socket not open
pg_dump: SQL command to dump the contents of table "llamadas" failed:
PQendcopy() failed.
pg_dump: Error message from server: socket not open
pg_dump: The command was: COPY public.llamadas (cod_empresa,
fecha_llamada, tfno_origen, tfno_destino, duracion_llamada,
hora_llamada, cod_destino_llamada, cod_pais_destino,
cod_destino_internacional, franja_horaria, importe, cod_fuente,
precio_coste_llamada, observaciones_llamada, coment_llamada,
fecha_factura, num_factura, fecha_alta, fecha_ult_mod, fecha_sis_alta,
usuario_alta, i_a_alta, fecha_sis_ult_mod, usuario_ult_mod, i_a_ult_mod,
periodicidad_facturacion, cod_operador, franja_horaria_operador,
fichero_origen, cod_destino_internacional_operador) TO stdout;


> What about if you issue a SELECT for all records in the table?


heos=# select * from llamadas;
server closed the connection unexpectedly
         This probably means the server terminated abnormally
         before or while processing the request.
The connection to the server was lost. Attempting reset: WARNING:
terminating connection because of crash of another server process
DETAIL:  The postmaster has commanded this server process to roll back
the current transaction and exit, because another server process exited
abnormally and possibly corrupted shared memory.
HINT:  In a moment you should be able to reconnect to the database and
repeat your command.
Failed.

In the logfile:

LOG:  server process (PID 7069) was terminated by signal 11
LOG:  terminating any other active server processes
WARNING:  terminating connection because of crash of another server process
DETAIL:  The postmaster has commanded this server process to roll back
the current transaction and exit, because another server process exited
abnormally and possibly corrupted shared memory.
HINT:  In a moment you should be able to reconnect to the database and
repeat your command.
LOG:  all server processes terminated; reinitializing
LOG:  database system was interrupted at 2005-09-26 16:49:43 CEST
LOG:  checkpoint record is at 125/858E0144
LOG:  redo record is at 125/858E0144; undo record is at 0/0; shutdown FALSE
LOG:  next transaction ID: 2270061; next OID: 30820346
LOG:  database system was not properly shut down; automatic recovery in
progress
LOG:  record with zero length at 125/858E0184
LOG:  redo is not required
LOG:  database system is ready
LOG:  unexpected EOF on client connection



 > What does "\d tablename" show for the table in question?

heos=# \d llamadas;
                                               Table "public.llamadas"
                Column               |           Type           |
               Modifiers
------------------------------------+--------------------------+----------------------------------------------------
  cod_empresa                        | smallint                 | not null
  fecha_llamada                      | date                     |
  tfno_origen                        | character(15)            |
  tfno_destino                       | character(15)            |
  duracion_llamada                   | integer                  |
  hora_llamada                       | time without time zone   |
default ('now'::text)::time(6) with time zone
  cod_destino_llamada                | character(1)             |
  cod_pais_destino                   | integer                  |
  cod_destino_internacional          | character(15)            |
  franja_horaria                     | character(1)             |
  importe                            | real                     |
  cod_fuente                         | integer                  |
  precio_coste_llamada               | real                     |
  observaciones_llamada              | character varying(100)   |
  coment_llamada                     | character varying(100)   |
  fecha_factura                      | date                     |
  num_factura                        | integer                  |
  fecha_alta                         | date                     |
  fecha_ult_mod                      | date                     |
  fecha_sis_alta                     | timestamp with time zone |
default ('now'::text)::timestamp(6) with time zone
  usuario_alta                       | character(10)            |
  i_a_alta                           | character(15)            |
  fecha_sis_ult_mod                  | timestamp with time zone |
  usuario_ult_mod                    | character(10)            |
  i_a_ult_mod                        | character(15)            |
  periodicidad_facturacion           | character(1)             |
  cod_operador                       | character(2)             |
  franja_horaria_operador            | character(1)             |
  fichero_origen                     | character varying(100)   |
  cod_destino_internacional_operador | character(15)            |
Indexes:
     "llamadas_i01" btree (cod_empresa, fecha_llamada, tfno_origen)