The following bug has been logged online:

Bug reference: 2049
Logged by: Prakash Suryavanshi
Email address: cadet_02prakash@yahoo.com
PostgreSQL version: 7.2
Operating system: Linux
Description: pg_dump BACKUP error
Details:

Respected Sir,
I am working on Linux 9.0 and using postgres 7.2 on it. I am facing
problem while taking backup of database. I am elaborating situation as
follows.

Pg_dump commond used to take a backup of my database the command which I
used is as follows

> pg_dump <Database name> > <target file name>

system flashes error as follows

bash-2.05b$ pg_dump chrome2105 > 2nov1505
pg_dump: ERROR: _mdfd_getrelnfd: cannot open relation ed_accounttype:
Permission denied
pg_dump: lost synchronization with server, resetting connection
pg_dump: SQL command to dump the contents of table "ed_accounttype" failed:
PQendcopy() failed.
pg_dump: Error message from server: pg_dump: The command was: COPY
public.ed_accounttype (accounttypeid, sname, shname, des, active,
systemflag, softdelete, datalocationid) TO stdout;
bash-2.05b$

Can anybody send me solution how to take backup if above error occured..?
This is happening frequently. I had formated the server and again installed
Linux then restore database steel problem persist.

hopping to get early response.

Thanks and regards
Prakash Suryavanshi
iota technologies ltd., Pune

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"Prakash Suryavanshi" <cadet_02prakash@yahoo.com> writes:
> system flashes error as follows

> bash-2.05b$ pg_dump chrome2105 > 2nov1505
> pg_dump: ERROR: _mdfd_getrelnfd: cannot open relation ed_accounttype:
> Permission denied

You've apparently started the postmaster as the wrong user, or else
someone's changed the ownership/permissions of the database files
underneath you. Every file within the $PGDATA directory tree ought to
be owned by the user that the postmaster runs as, and readable/writable
only by that user (mode -rw-------, or -rwx------ for directories).

Note that pg 7.2 is horribly ancient --- you should update to something
newer and still-supported as soon as you get that dump made.

regards, tom lane

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