Re: [HACKERS] Crash on promotion when recovery.conf is renamed

On 12/20/16 2:54 AM, Michael Paquier wrote:
> On Sat, Dec 17, 2016 at 9:23 PM, Magnus Hagander <magnus@hagander.net> wrote:
>> On Fri, Dec 16, 2016 at 7:08 AM, Michael Paquier <michael.paquier@gmail.com>
>> wrote:
>>> Looking at PrescanPreparedTransactions(), I am thinking as well that it
>>> would
>>> be better to get a hard failure when bumping on a corrupted 2PC file.
>>> Future
>>> files are one thing, but corrupted files should be treated more carefully.
>>
>>
>> Again without looking at it, I agree (so much easier that way :P). Ignoring
>> corruption is generally a bad idea. Failing hard makes the user notice the
>> error, and makes it possible to initiate recovery from a standby or from
>> backups or something, or to *intentionally* remove/clear/ignore it.
> 
> And I am finishing with the two patches attached:
> - 0001 changes the 2PC checks so as corrupted entries are FATAL.
> PreScanPreparedTransaction is used when a hot standby is initialized.
> In this case a failure protects the range of XIDs generated,
> potentially saving from corruption of data. At the end of recovery,
> this is done before any on-disk actions are taken.
> - 0002 is the thing that Heikki has sent previously to minimize the
> window between end-of-recovery record write and timeline history file
> archiving.
> 
> I am attaching that to next CF.

This patch still applies cleanly and compiles at cccbdde.

Any idea when you'll have a chance to review?

-- 
-David
david@pgmasters.net