sharpetronics/PostgreSQL
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-05-31 00:01:57 -04:00
Code Issues Projects Releases Wiki Activity

Fix bug in clean shutdown of walsender that pg_receiving is connecting to.

Browse Source 
On clean shutdown, walsender waits for all WAL to be replicated to a standby,
and exits. It determined whether that replication had been completed by
checking whether its sent location had been equal to a standby's flush
location. Unfortunately this condition never becomes true when the standby
such as pg_receivexlog which always returns an invalid flush location is
connecting to walsender, and then walsender waits forever.

This commit changes walsender so that it just checks a standby's write
location if a flush location is invalid.

Back-patch to 9.1 where enough infrastructure for this exists.
This commit is contained in:
Fujii Masao 2014-03-17 20:41:12 +09:00
parent 60829079d7
commit 3857234053
1 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/backend/replication/walsender.c
View File

@ -1053,9 +1053,20 @@ WalSndLoop(void)
*/
if (walsender_ready_to_stop)
{
XLogRecPtr replicatedPtr;
/* ... let's just be real sure we're caught up ... */
XLogSend(&caughtup);
if (caughtup && sentPtr == MyWalSnd->flush &&
/*
* Check a write location to see whether all the WAL have
* successfully been replicated if this walsender is connecting
* to a standby such as pg_receivexlog which always returns
* an invalid flush location. Otherwise, check a flush location.
*/
replicatedPtr = XLogRecPtrIsInvalid(MyWalSnd->flush) ?
MyWalSnd->write : MyWalSnd->flush;
if (caughtup && sentPtr == replicatedPtr &&
!pq_is_send_pending())
{
/* Inform the standby that XLOG streaming is done */