Fix start WAL filename for concurrent backups from standby

mhagander · mhagander · commit 87d84d67bb15 · 2016-07-11T12:02:31.000+02:00
On a standby, ThisTimelineID is always 0, so we would generate a
filename in timeline 0 even for other timelines. Instead, use starttli
which we have retreived from the controlfile.

Report by: Francesco Canovai in bug #14230
Author: Marco Nenciarini
Reviewed by: Michael Paquier and Amit Kapila
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
@@ -9974,7 +9974,7 @@ do_pg_start_backup(const char *backupidstr, bool fast, TimeLineID *starttli_p,
 		} while (!gotUniqueStartpoint);
 
 		XLByteToSeg(startpoint, _logSegNo);
-		XLogFileName(xlogfilename, ThisTimeLineID, _logSegNo);
+		XLogFileName(xlogfilename, starttli, _logSegNo);
 
 		/*
 		 * Construct tablespace_map file
