Re: BUG #4879: bgwriter fails to fsync the file in recovery mode - Mailing list pgsql-bugs

From Simon Riggs
Subject Re: BUG #4879: bgwriter fails to fsync the file in recovery mode
Date
Msg-id 1245941657.4038.106.camel@ebony.2ndQuadrant
Whole thread Raw
In response to BUG #4879: bgwriter fails to fsync the file in recovery mode  ("Fujii Masao" <masao.fujii@gmail.com>)
List pgsql-bugs
On Thu, 2009-06-25 at 12:55 +0000, Fujii Masao wrote:

> The restartpoint by bgwriter in recovery mode caused the following error.
>
>     ERROR:  could not fsync segment 0 of relation base/11564/16422_fsm: No
> such file or directory

I think I see a related bug also.

register_dirty_segment() run by Startup process doesn't differentiate
correctly whether the bgwriter is active. md.c line 1194. So it will
continue to register fsync requests into its own private pendingOpsTable
when it should be forwarding them to bgwriter. When bgwriter runs
mdsync() the contents of startup's pendingOpsTable will be ignored.

That looks to me to be a serious bug.

--
 Simon Riggs           www.2ndQuadrant.com
 PostgreSQL Training, Services and Support

pgsql-bugs by date:

Previous
From: Tom Lane
Date:
Subject: Re: BUG #4879: bgwriter fails to fsync the file in recovery mode
Next
From: Simon Riggs
Date:
Subject: Re: BUG #4879: bgwriter fails to fsync the file in recovery mode