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Commitf500ba0

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Add some checkpoint and redo LSNs to a couple of recovery errors
Two FATALs and one PANIC gain details about the LSNs they fail at:- When restoring from a backup_label, the FATAL log generated when notfinding the checkpoint record now reports its LSN.- When restoring from a backup_label, the FATAL log generated when notfinding the redo record referenced by a checkpoint record now shows boththe redo and checkpoint record LSNs.- When not restoring from a backup_label, the PANIC error generated whennot finding the checkpoint record now reports its LSN.This information is useful when debugging corruption issues, and theseLSNs may not show up in the logs depending on the level of loggingconfigured in the backend.Author: David SteeleDiscussion:https://postgr.es/m/0e90da89-77ca-4ccf-872c-9626d755e288@pgmasters.net
1 parenta04ddd0 commitf500ba0

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‎src/backend/access/transam/xlogrecovery.c‎

Lines changed: 6 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -646,7 +646,8 @@ InitWalRecovery(ControlFileData *ControlFile, bool *wasShutdown_ptr,
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if (!ReadRecord(xlogprefetcher,LOG, false,
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checkPoint.ThisTimeLineID))
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ereport(FATAL,
649-
(errmsg("could not find redo location referenced by checkpoint record"),
649+
(errmsg("could not find redo location %X/%X referenced by checkpoint record at %X/%X",
650+
LSN_FORMAT_ARGS(checkPoint.redo),LSN_FORMAT_ARGS(CheckPointLoc)),
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errhint("If you are restoring from a backup, touch \"%s/recovery.signal\" or \"%s/standby.signal\" and add required recovery options.\n"
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"If you are not restoring from a backup, try removing the file \"%s/backup_label\".\n"
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"Be careful: removing \"%s/backup_label\" will result in a corrupt cluster if restoring from a backup.",
@@ -656,7 +657,8 @@ InitWalRecovery(ControlFileData *ControlFile, bool *wasShutdown_ptr,
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else
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{
658659
ereport(FATAL,
659-
(errmsg("could not locate required checkpoint record"),
660+
(errmsg("could not locate required checkpoint record at %X/%X",
661+
LSN_FORMAT_ARGS(CheckPointLoc)),
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errhint("If you are restoring from a backup, touch \"%s/recovery.signal\" or \"%s/standby.signal\" and add required recovery options.\n"
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"If you are not restoring from a backup, try removing the file \"%s/backup_label\".\n"
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"Be careful: removing \"%s/backup_label\" will result in a corrupt cluster if restoring from a backup.",
@@ -790,7 +792,8 @@ InitWalRecovery(ControlFileData *ControlFile, bool *wasShutdown_ptr,
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* simplify processing around checkpoints.
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*/
792794
ereport(PANIC,
793-
(errmsg("could not locate a valid checkpoint record")));
795+
(errmsg("could not locate a valid checkpoint record at %X/%X",
796+
LSN_FORMAT_ARGS(CheckPointLoc))));
794797
}
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memcpy(&checkPoint,XLogRecGetData(xlogreader),sizeof(CheckPoint));
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wasShutdown= ((record->xl_info& ~XLR_INFO_MASK)==XLOG_CHECKPOINT_SHUTDOWN);

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