On Wed, Aug 03, 2022 at 11:24:17AM +0900, Kyotaro Horiguchi wrote: > At Tue, 2 Aug 2022 16:03:42 -0500, Don Seiler <d...@seiler.us> wrote in > > could not link file “pg_wal/xlogtemp.18799" to > > > “pg_wal/000000010000D45300000010”: File exists
> Hmm. It seems like a race condition betwen StartupXLOG() and > RemoveXlogFIle(). We need wider extent of ContolFileLock. Concretely > taking ControlFileLock before deciding the target xlog file name in > RemoveXlogFile() seems to prevent this happening. (If this is correct > this is a live issue on the master branch.) RemoveXlogFile() calls InstallXLogFileSegment() with find_free=true. The intent of find_free=true is to make it okay to pass a target xlog file that ceases to be a good target. (InstallXLogFileSegment() searches for a good target while holding ControlFileLock.) Can you say more about how that proved to be insufficient?
