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Fix corner-case bug in tracking of latest removed WAL segment during

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streaming replication. We used log/seg 0/0 to indicate that no WAL segments
have been removed since startup, but 0/0 is a valid value for the very first
WAL segment after initdb. To make that disambiguous, store
(latest removed WAL segment + 1) in the global variable.

Per report from Matt Chesler, also reproduced by Greg Smith.
This commit is contained in:
Heikki Linnakangas
2010-11-01 09:56:45 +02:00
parent 76b12e0af7
commit 931b6db39b
2 changed files with 7 additions and 4 deletions
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2
src/backend/replication/walsender.c
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@@ -654,7 +654,7 @@ XLogRead(char *buf, XLogRecPtr recptr, Size nbytes)
XLogGetLastRemoved(&lastRemovedLog, &lastRemovedSeg);
XLByteToSeg(startRecPtr, log, seg);
if (log < lastRemovedLog ||
(log == lastRemovedLog && seg <= lastRemovedSeg))
(log == lastRemovedLog && seg < lastRemovedSeg))
{
char filename[MAXFNAMELEN];