database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-16 06:01:02 +03:00
Code Activity

Revert "Fix replay of create database records on standby"

Browse Source 
This reverts commit 49d9cfc68b.  The approach taken by this patch has
problems, so we'll come up with a radically different fix.

Discussion: https://postgr.es/m/CA+TgmoYcUPL+WOJL2ZzhH=zmrhj0iOQ=iCFM0SuYqBbqZEamEg@mail.gmail.com
This commit is contained in:
Alvaro Herrera
2022-03-29 15:36:21 +02:00
parent edea649afb
commit bf902c1393
7 changed files with 1 additions and 311 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
src/backend/commands/dbcommands.c
View File

@ -30,7 +30,6 @@
#include "access/tableam.h"
#include "access/xact.h"
#include "access/xloginsert.h"
#include "access/xlogrecovery.h"
#include "access/xlogutils.h"
#include "catalog/catalog.h"
#include "catalog/dependency.h"
@ -2484,9 +2483,7 @@ dbase_redo(XLogReaderState *record)
xl_dbase_create_rec *xlrec = (xl_dbase_create_rec *) XLogRecGetData(record);
char *src_path;
char *dst_path;
char *parent_path;
struct stat st;
bool skip = false;
src_path = GetDatabasePath(xlrec->src_db_id, xlrec->src_tablespace_id);
dst_path = GetDatabasePath(xlrec->db_id, xlrec->tablespace_id);
@ -2504,56 +2501,6 @@ dbase_redo(XLogReaderState *record)
(errmsg("some useless files may be left behind in old database directory \"%s\"",
dst_path)));
}
else if (!reachedConsistency)
{
/*
* It is possible that a drop tablespace record appearing later in
* WAL has already been replayed -- in other words, that we are
* replaying the database creation record a second time with no
* intervening checkpoint. In that case, the tablespace directory
* has already been removed and the create database operation
* cannot be replayed. Skip the replay itself, but remember the
* fact that the tablespace directory is missing, to be matched
* with the expected tablespace drop record later.
*/
parent_path = pstrdup(dst_path);
get_parent_directory(parent_path);
if (!(stat(parent_path, &st) == 0 && S_ISDIR(st.st_mode)))
{
XLogRememberMissingDir(xlrec->tablespace_id, InvalidOid, parent_path);
skip = true;
ereport(WARNING,
(errmsg("skipping replay of database creation WAL record"),
errdetail("The target tablespace \"%s\" directory was not found.",
parent_path),
errhint("A future WAL record that removes the directory before reaching consistent mode is expected.")));
}
pfree(parent_path);
}
/*
* If the source directory is missing, skip the copy and make a note of
* it for later.
*
* One possible reason for this is that the template database used for
* creating this database may have been dropped, as noted above.
* Moving a database from one tablespace may also be a partner in the
* crime.
*/
if (!(stat(src_path, &st) == 0 && S_ISDIR(st.st_mode)) &&
!reachedConsistency)
{
XLogRememberMissingDir(xlrec->src_tablespace_id, xlrec->src_db_id, src_path);
skip = true;
ereport(WARNING,
(errmsg("skipping replay of database creation WAL record"),
errdetail("The source database directory \"%s\" was not found.",
src_path),
errhint("A future WAL record that removes the directory before reaching consistent mode is expected.")));
}
if (skip)
return;
/*
* Force dirty buffers out to disk, to ensure source database is
@ -2616,10 +2563,6 @@ dbase_redo(XLogReaderState *record)
ereport(WARNING,
(errmsg("some useless files may be left behind in old database directory \"%s\"",
dst_path)));
if (!reachedConsistency)
XLogForgetMissingDir(xlrec->tablespace_ids[i], xlrec->db_id);
pfree(dst_path);
}