Обсуждение: [GENERAL] contrecord is requested

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[GENERAL] contrecord is requested

От
Scott Marlowe
Дата:
So we have a db we're trying to rewind and get synced to the master.
pg_rewind says it doesn't need rewinding, and when we try to bring it
up, it gets this error:

"contrecord is requested by 2E7/40000028"

And fails to get back up.

Is this a known issue? Possible bug in the continuation record code?

The only references I can find for it are in the xlogreader code.


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Re: [GENERAL] contrecord is requested

От
Michael Paquier
Дата:
On Tue, Sep 12, 2017 at 5:27 AM, Scott Marlowe <scott.marlowe@gmail.com> wrote:
> So we have a db we're trying to rewind and get synced to the master.
> pg_rewind says it doesn't need rewinding, and when we try to bring it
> up, it gets this error:
>
> "contrecord is requested by 2E7/40000028"
>
> And fails to get back up.

The consistency recovery point defined by pg_rewind was not reached then.

> Is this a known issue?

Never heard of this one.

> Possible bug in the continuation record code?

That looks like a possibility. This complains is about the fact that
the XLOG page header cannot be found where it should. You may want to
check your WAL segments.
-- 
Michael


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Re: [GENERAL] contrecord is requested

От
Jeff Janes
Дата:
On Mon, Sep 11, 2017 at 1:27 PM, Scott Marlowe <scott.marlowe@gmail.com> wrote:
So we have a db we're trying to rewind and get synced to the master.
pg_rewind says it doesn't need rewinding, and when we try to bring it
up, it gets this error:

"contrecord is requested by 2E7/40000028"

And fails to get back up.

Is this a known issue? Possible bug in the continuation record code?

The only references I can find for it are in the xlogreader code.

I've seen this twice lately and both times it was user error.

One time someone who shall remain nameless made a replica of a remote QA server using "pg_basebackup -R ...", but then copied the *.conf files **including recovery.conf** from the running replica of the the remote production server into the new directory for the replica of the remote QA server.  So primary_conninfo had been overwritten to point to the wrong master server.

The other time someone who shall also remain nameless accidentally fully opened up a newly cloned (from a cold backup, I think) of an dummy benchmarking server, instead of putting it into standby.  And then tried to shut it down and re-open it as a standby without doing a full refresh. But of course it was too late to do that.

Cheers,

Nameless

Re: [GENERAL] contrecord is requested

От
Scott Marlowe
Дата:
On Tue, Sep 12, 2017 at 10:19 AM, Jeff Janes <jeff.janes@gmail.com> wrote:
> On Mon, Sep 11, 2017 at 1:27 PM, Scott Marlowe <scott.marlowe@gmail.com>
> wrote:
>>
>> So we have a db we're trying to rewind and get synced to the master.
>> pg_rewind says it doesn't need rewinding, and when we try to bring it
>> up, it gets this error:
>>
>> "contrecord is requested by 2E7/40000028"
>>
>> And fails to get back up.
>>
>> Is this a known issue? Possible bug in the continuation record code?
>>
>> The only references I can find for it are in the xlogreader code.
>
>
> I've seen this twice lately and both times it was user error.
>
> One time someone who shall remain nameless made a replica of a remote QA
> server using "pg_basebackup -R ...", but then copied the *.conf files
> **including recovery.conf** from the running replica of the the remote
> production server into the new directory for the replica of the remote QA
> server.  So primary_conninfo had been overwritten to point to the wrong
> master server.
>
> The other time someone who shall also remain nameless accidentally fully
> opened up a newly cloned (from a cold backup, I think) of an dummy
> benchmarking server, instead of putting it into standby.  And then tried to
> shut it down and re-open it as a standby without doing a full refresh. But
> of course it was too late to do that.

Thanks will check on that.


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