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Commit71cb84e

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Add LSN location in some error messages related to WAL pages
The error messages reported during any failures while reading orvalidating the header of a WAL currently includes only the offset of thepage but not the compiled LSN referring to the page, requiring an extrastep to compile it if looking at the surroundings with pg_waldump orsimilar. Adding this information costs a bit in translation, but alsoeases debugging.Author: Bharath RupireddyReviewed-by: Álvaro Herrera, Kyotaro Horiguchi, Maxim Orlov, MichaelPaquierDiscussion:https://postgr.es/m/CALj2ACWV=FCddsxcGbVOA=cvPyMr75YCFbSQT6g4KDj=gcJK4g@mail.gmail.com
1 parent8692f66 commit71cb84e

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2 files changed

+18
-10
lines changed

2 files changed

+18
-10
lines changed

‎src/backend/access/transam/xlogreader.c

Lines changed: 10 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -1226,9 +1226,10 @@ XLogReaderValidatePageHeader(XLogReaderState *state, XLogRecPtr recptr,
12261226
XLogFileName(fname,state->seg.ws_tli,segno,state->segcxt.ws_segsize);
12271227

12281228
report_invalid_record(state,
1229-
"invalid magic number %04X in WAL segment %s, offset %u",
1229+
"invalid magic number %04X in WAL segment %s,LSN %X/%X,offset %u",
12301230
hdr->xlp_magic,
12311231
fname,
1232+
LSN_FORMAT_ARGS(recptr),
12321233
offset);
12331234
return false;
12341235
}
@@ -1240,9 +1241,10 @@ XLogReaderValidatePageHeader(XLogReaderState *state, XLogRecPtr recptr,
12401241
XLogFileName(fname,state->seg.ws_tli,segno,state->segcxt.ws_segsize);
12411242

12421243
report_invalid_record(state,
1243-
"invalid info bits %04X in WAL segment %s, offset %u",
1244+
"invalid info bits %04X in WAL segment %s,LSN %X/%X,offset %u",
12441245
hdr->xlp_info,
12451246
fname,
1247+
LSN_FORMAT_ARGS(recptr),
12461248
offset);
12471249
return false;
12481250
}
@@ -1281,9 +1283,10 @@ XLogReaderValidatePageHeader(XLogReaderState *state, XLogRecPtr recptr,
12811283

12821284
/* hmm, first page of file doesn't have a long header? */
12831285
report_invalid_record(state,
1284-
"invalid info bits %04X in WAL segment %s, offset %u",
1286+
"invalid info bits %04X in WAL segment %s,LSN %X/%X,offset %u",
12851287
hdr->xlp_info,
12861288
fname,
1289+
LSN_FORMAT_ARGS(recptr),
12871290
offset);
12881291
return false;
12891292
}
@@ -1300,9 +1303,10 @@ XLogReaderValidatePageHeader(XLogReaderState *state, XLogRecPtr recptr,
13001303
XLogFileName(fname,state->seg.ws_tli,segno,state->segcxt.ws_segsize);
13011304

13021305
report_invalid_record(state,
1303-
"unexpected pageaddr %X/%X in WAL segment %s, offset %u",
1306+
"unexpected pageaddr %X/%X in WAL segment %s,LSN %X/%X,offset %u",
13041307
LSN_FORMAT_ARGS(hdr->xlp_pageaddr),
13051308
fname,
1309+
LSN_FORMAT_ARGS(recptr),
13061310
offset);
13071311
return false;
13081312
}
@@ -1325,10 +1329,11 @@ XLogReaderValidatePageHeader(XLogReaderState *state, XLogRecPtr recptr,
13251329
XLogFileName(fname,state->seg.ws_tli,segno,state->segcxt.ws_segsize);
13261330

13271331
report_invalid_record(state,
1328-
"out-of-sequence timeline ID %u (after %u) in WAL segment %s, offset %u",
1332+
"out-of-sequence timeline ID %u (after %u) in WAL segment %s,LSN %X/%X,offset %u",
13291333
hdr->xlp_tli,
13301334
state->latestPageTLI,
13311335
fname,
1336+
LSN_FORMAT_ARGS(recptr),
13321337
offset);
13331338
return false;
13341339
}

‎src/backend/access/transam/xlogrecovery.c

Lines changed: 8 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -3075,9 +3075,10 @@ ReadRecord(XLogPrefetcher *xlogprefetcher, int emode,
30753075
XLogFileName(fname,xlogreader->seg.ws_tli,segno,
30763076
wal_segment_size);
30773077
ereport(emode_for_corrupt_record(emode,xlogreader->EndRecPtr),
3078-
(errmsg("unexpected timeline ID %u in WAL segment %s, offset %u",
3078+
(errmsg("unexpected timeline ID %u in WAL segment %s,LSN %X/%X,offset %u",
30793079
xlogreader->latestPageTLI,
30803080
fname,
3081+
LSN_FORMAT_ARGS(xlogreader->latestPagePtr),
30813082
offset)));
30823083
record=NULL;
30833084
}
@@ -3280,14 +3281,16 @@ XLogPageRead(XLogReaderState *xlogreader, XLogRecPtr targetPagePtr, int reqLen,
32803281
errno=save_errno;
32813282
ereport(emode_for_corrupt_record(emode,targetPagePtr+reqLen),
32823283
(errcode_for_file_access(),
3283-
errmsg("could not read from WAL segment %s, offset %u: %m",
3284-
fname,readOff)));
3284+
errmsg("could not read from WAL segment %s, LSN %X/%X, offset %u: %m",
3285+
fname,LSN_FORMAT_ARGS(targetPagePtr),
3286+
readOff)));
32853287
}
32863288
else
32873289
ereport(emode_for_corrupt_record(emode,targetPagePtr+reqLen),
32883290
(errcode(ERRCODE_DATA_CORRUPTED),
3289-
errmsg("could not read from WAL segment %s, offset %u: read %d of %zu",
3290-
fname,readOff,r, (Size)XLOG_BLCKSZ)));
3291+
errmsg("could not read from WAL segment %s, LSN %X/%X, offset %u: read %d of %zu",
3292+
fname,LSN_FORMAT_ARGS(targetPagePtr),
3293+
readOff,r, (Size)XLOG_BLCKSZ)));
32913294
gotonext_record_is_invalid;
32923295
}
32933296
pgstat_report_wait_end();

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