Re: error during pg_dump

SOLVED.

So it turns out that you can't access unlogged tables on the replica:

exchange_prod=# select count(1) from office_imports;
ERROR: cannot access temporary or unlogged relations during recovery

The solution was to add the --no-unlogged-table-data option to pg_dump and it dumps successfully.

I got really scared when some files were missing, but things look good now.

w00.

...spike

On Sep 27, 2012, at 2:24 PM, Spike Grobstein wrote:

> btw, I just realized... this table that it's failing on is unlogged. I'm beginning to do some googling based around that tidbit of information, but I wanted to get that clarification on here sooner rather than later.
>
> Thanks!
>
>
> ...spike
>
>
> On Sep 27, 2012, at 1:29 PM, Spike Grobstein wrote:
>
>> Hi,
>>
>> I'm running into an issue with our backup process using pg_dump on our replica that I just noticed.
>>
>> When running pg_dump, I get the following error:
>>
>> pg_dump: SQL command failed
>> pg_dump: Error message from server: ERROR: could not open file "base/3273817/4515672": No such file or directory
>> pg_dump: The command was: COPY public.office_imports (id, created_at, updated_at, office_id, import_last_active_at) TO stdout;
>> pg_dump: *** aborted because of error
>>
>> This occurs while dumping the contents of tables on the 57th table (we have 110 tables), so about halfway through.
>>
>> I'm using the following command when dumping:
>>
>> pg_dump -v -ESQL_ASCII -Upostgres -Fc -fd_1 $MY_DATABASE
>>
>> We're running postgresql 9.1.4 on Ubuntu Linux 64-bit on bare-metal hardware. We've got over 100GB free on the filesystem that we're dumping to and the average size of our dumps is around 3.2GB. When this fails, the dump is ~2.3GB (it fluctuates because the size of the first 57 tables changes).
>>
>> The dumps are done from our replica which is replicated to using streaming replication. When I do a dump from the master database server (identical hardware and configuration), it runs to completion without error.
>>
>> I stopped and started postgres on the replica, and it stops and starts without errors or warnings.
>>
>> I then stopped postgres on the replica, renamed the data directory to data.old and followed the instructions on:
>>
>> http://wiki.postgresql.org/wiki/Streaming_Replication
>>
>> to re-configure streaming replication (using rsync).
>>
>> After that was done, I moved my recovery.conf file back into place and started postgres and it replication is working, but when I do pg_dump again, it fails with the same error. That doesn't really seem to make sense.
>>
>> Any ideas?
>>
>> In the interim, our daily dumps are being moved to the master so we have backups.
>>
>> thanks!
>>
>>
>>
>> ...spike
>> Spike Grobstein
>> Ticket Evolution
>