Re: 8.2beta1 (w32): server process crash (tsvector)

Did some more tests, and it's even easier to repro this. No need to
update, just
SELECT to_tsvector('default',sometext) from test;

It appears to be data dependent still, though, because just running
SELECT to_tsvector('default','foo bar foo bar foo bar foo bar')
fromgenerate_series(1,1000000) works withuot a hitch.


Also, the "detected write past chunk end" comes from the pfree() in
tsvector.c, function unqiueWORD() line 656. At this point, "ptr->word"
points at the text "temp" followed by a bunch of junk. The callstack
leading up to this is:
     postgres.exe!AllocSetFree(MemoryContextData *
context=3D0x02c37bd8, void * pointer=3D0x02c65ed0)  Line 775    C
     postgres.exe!pfree(void * pointer=3D0x02c65ed0)  Line 585 + 0x17
bytes    C
     tsearch2.dll!uniqueWORD(TSWORD * a=3D0x02c66e60, int l=3D517)  Line
656 + 0xc bytes    C
     tsearch2.dll!makevalue(PRSTEXT * prs=3D0x00d4f44c)  Line 692 +
0x12 bytes    C
     tsearch2.dll!to_tsvector(FunctionCallInfoData *
fcinfo=3D0x00d4f46c)  Line 764 + 0x9 bytes    C
     postgres.exe!DirectFunctionCall3(unsigned long
(FunctionCallInfoData *)* func=3D0x02cd1131, unsigned long arg1=3D16473,
unsigned long arg2=3D49941724, unsigned long arg3=3D0)  Line 905 + 0xa bytes
C
     tsearch2.dll!to_tsvector_name(FunctionCallInfoData *
fcinfo=3D0x00d4f6b0)  Line 787 + 0x20 bytes    C


Now, the parametsrs to to_tsvector() looks weird - the "text *in =3D
PG_GETARG_TEXT_P(1)" appears to return a struct with vl_len set t
2139062143, which seems. Eh. Wrong? :) But this does not happen on the
*first* call to to_tsquery() which shows a proper text, but subsequent
calls show what lokos like garbage a couple of times, and then the
WARNING about the write past end fires.

//Magnus=20

> -----Original Message-----
> From: pgsql-bugs-owner@postgresql.org=20
> [mailto:pgsql-bugs-owner@postgresql.org] On Behalf Of Magnus Hagander
> Sent: den 12 november 2006 17:06
> To: Thomas H.; pgsql-bugs@postgresql.org
> Cc: Tom Lane
> Subject: Re: [BUGS] 8.2beta1 (w32): server process crash (tsvector)
>=20
> Ok, I've run this test on an assert enabled build (my msvc=20
> build, actually, so I could get a debugger on it if needed).=20
> It then outputs:
>=20
> WARNING:  detected write past chunk end in ExprContext 02C6D0F8
> WARNING:  detected write past chunk end in ExprContext 02C6AEA0
> WARNING:  detected write past chunk end in ExprContext 02C6B200
> WARNING:  detected write past chunk end in ExprContext 02C44630
> WARNING:  detected write past chunk end in ExprContext 02C4C118
> WARNING:  problem in alloc set ExprContext: bogus aset link=20
> in block 02C435A8, c hunk 02C44520
> WARNING:  detected write past chunk end in ExprContext 02C66440
> WARNING:  detected write past chunk end in ExprContext 02C3B9D0
> WARNING:  detected write past chunk end in ExprContext 02C3BDE8
> WARNING:  detected write past chunk end in ExprContext 02C4E7E0
> WARNING:  detected write past chunk end in ExprContext 02C47508
> WARNING:  problem in alloc set ExprContext: bogus aset link=20
> in block 02C435A8, c hunk 02C47528
> WARNING:  detected write past chunk end in ExprContext 02C43800
> WARNING:  detected write past chunk end in ExprContext 02C66C90
> WARNING:  detected write past chunk end in ExprContext 02C68270
> WARNING:  detected write past chunk end in ExprContext 02C4F5D8
> WARNING:  problem in alloc set ExprContext: bogus aset link=20
> in block 02C4E6F8, c hunk 02C4F5F8
> WARNING:  detected write past chunk end in ExprContext 02C7B680
> WARNING:  detected write past chunk end in ExprContext 02C45190
> WARNING:  detected write past chunk end in ExprContext 02C46AC8
> WARNING:  detected write past chunk end in ExprContext 02C3C538
> WARNING:  detected write past chunk end in ExprContext 02C67B90
> WARNING:  detected write past chunk end in ExprContext 02C438F0
> WARNING:  problem in alloc set ExprContext: bad single-chunk=20
> 02C43FB8 in block 0
> 2C435A8
> WARNING:  problem in alloc set ExprContext: bogus aset link=20
> in block 02C435A8, c hunk 02C43FB8 server closed the=20
> connection unexpectedly
>         This probably means the server terminated abnormally
>         before or while processing the request.=20
>=20
>=20
>=20
>=20
> The actual crash happens on line 1142 of AllocSetCheck. Full callstack
> is:
> >    postgres.exe!AllocSetCheck(MemoryContextData *
> context=3D0x02c455b8)  Line 1142 + 0x11 bytes    C
>      postgres.exe!AllocSetReset(MemoryContextData *
> context=3D0x02c455b8)  Line 409 + 0x9 bytes    C
>      postgres.exe!MemoryContextReset(MemoryContextData *
> context=3D0x02c455b8)  Line 129 + 0xf bytes    C
>      postgres.exe!ExecScan(ScanState * node=3D0x02c227d0,=20
> TupleTableSlot * (ScanState *)* accessMtd=3D0x00530b70)  Line 91 + 0xc
> bytes    C
>      postgres.exe!ExecSeqScan(ScanState * node=3D0x02c227d0)  Line 130
> + 0xe bytes    C
>      postgres.exe!ExecProcNode(PlanState * node=3D0x02c227d0)  Line 349
> + 0x9 bytes    C
>      postgres.exe!ExecutePlan(EState * estate=3D0x02c223e8,=20
> PlanState * planstate=3D0x02c227d0, CmdType=20
> operation=3DCMD_UPDATE, long numberTuples=3D0, ScanDirection=20
> direction=3DForwardScanDirection, _DestReceiver *
> dest=3D0x02bf8d30)  Line 1081 + 0x9 bytes    C
>      postgres.exe!ExecutorRun(QueryDesc *=20
> queryDesc=3D0x02c44078, ScanDirection=20
> direction=3DForwardScanDirection, long count=3D0)  Line 246 +
> 0x20 bytes    C
>      postgres.exe!ProcessQuery(Query * parsetree=3D0x02bddab0,=20
> Plan * plan=3D0x02bf7e28, ParamListInfoData *=20
> params=3D0x00000000, _DestReceiver * dest=3D0x02bf8d30, char *=20
> completionTag=3D0x00d4fb24)  Line 157 + 0xd bytes C
>      postgres.exe!PortalRunMulti(PortalData *=20
> portal=3D0x02c48138, _DestReceiver * dest=3D0x02bf8d30,=20
> _DestReceiver * altdest=3D0x02bf8d30,
> char * completionTag=3D0x00d4fb24)  Line 1148 + 0x1c bytes    C
>      postgres.exe!PortalRun(PortalData * portal=3D0x02c48138,=20
> long count=3D2147483647, _DestReceiver * dest=3D0x02bf8d30,=20
> _DestReceiver * altdest=3D0x02bf8d30, char *=20
> completionTag=3D0x00d4fb24)  Line 700 + 0x15
> bytes    C
>      postgres.exe!exec_simple_query(const char *
> query_string=3D0x02bdd4c8)  Line 943 + 0x23 bytes    C
>      postgres.exe!PostgresMain(int argc=3D4, char * * argv=3D0x02ba2478,
> const char * username=3D0x025e7af8)  Line 3414 + 0xc bytes    C
>      postgres.exe!BackendRun(Port * port=3D0x00d4fd2c)  Line 2853 +
> 0x17 bytes    C
>      postgres.exe!SubPostmasterMain(int argc=3D3, char * *
> argv=3D0x025e5b30)  Line 3288 + 0xc bytes    C
>      postgres.exe!main(int argc=3D3, char * * argv=3D0x025e5b30)  Line
> 165 + 0xd bytes    C
>=20
>=20
>=20
>=20
> Can someone point me towards what next to check? :-)
>=20
> Oh, and per Thomas, this does NOT appear to happen in C=20
> locale, but happens in both de_CH and en_US. ANd I've tested=20
> in Swedish_Sweden, which also crashes.
>=20
> Note that this appears not to be index related at all,=20
> because during this test there is only a standard btree index=20
> on "someint", and nothing on the tsvector column.
>=20
> //Magnus
>=20
>=20
> > -----Original Message-----
> > From: pgsql-bugs-owner@postgresql.org=20
> > [mailto:pgsql-bugs-owner@postgresql.org] On Behalf Of Thomas H.
> > Sent: den 12 november 2006 15:06
> > To: pgsql-bugs@postgresql.org
> > Subject: Re: [BUGS] 8.2beta1 (w32): server process crash (tsvector)
> >=20
> > this bug (please see below) is unfortunately still present in
> > beta3 (win32 build). test case still crashes the child process and=20
> > lets postmaster kill & reload everything.
> >=20
> > it is not GiST-related, i've just validated the same problem using=20
> > GIN.
> >=20
> > this breaks tsearch2 functionality on our win32 system as no=20
> > tsvector-indexing of new/existing rows is possible (crash after ~10=20
> > processed rows). searching already indexed rows works fine.
> >=20
> > best regards,
> > thomas
> >=20
> > ----- Original Message -----
> > From: <me@alternize.com>
> > To: "Tom Lane" <tgl@sss.pgh.pa.us>
> > Cc: <pgsql-bugs@postgresql.org>
> > Sent: Tuesday, October 17, 2006 9:19 PM
> > Subject: Re: [BUGS] 8.2beta1 (w32): server process crash (tsvector)
> >=20
> >=20
> > >>> the following query will crash the server process:
> > >>> INSERT INTO news.news
> > >>> SELECT * FROM news.news2;
> > >>
> > >> This is undoubtedly data-dependent.  Can you supply some
> > sample data
> > >> that makes it happen?
> > >
> > > it's not only happening with INSERTS, but also updates. as
> > thats easier to
> > > test, here's how i can reproduce the error:
> > >
> > > 1. create new database (encoding: UTF8) with tsearch2 on
> > 8.2b1 win32
> > > (system
> > > locale: de_CH.1252)
> > > 2. insert the data from the zip file=20
> > > [http://alternize.com/pgsql/tsearch2test.zip] (be sure to
> > also update
> > > pg_ts_cf /
> > > pg_ts_cfgmap as we have WIN1252 locale) 3. execute UPDATE=20
> test SET=20
> > > idxFTI =3D to_tsvector('default',
> > "sometext"); or
> > > similar queries
> > > 4. hopefully see the process crashing as i do ;-)
> > >
> > >
> > > 2006-10-17 17:23:44 LOG:  server process (PID 4584)=20
> exited with exit=20
> > > code -1073741819
> > > 2006-10-17 17:23:44 LOG:  terminating any other active
> > server processes
> > > 2006-10-17 17:23:44 WARNING:  terminating connection
> > because of crash of
> > > another server process
> > > 2006-10-17 17:23:44 DETAIL:  The postmaster has commanded
> > this server
> > > process to roll back the current transaction and exit,
> > because another
> > > server process exited abnormally and possibly corrupted
> > shared memory.
> > > {snipp}
> > > 2006-10-17 17:23:44 LOG:  all server processes terminated;
> > reinitializing
> > > 2006-10-17 17:23:44 LOG:  database system was interrupted
> > at 2006-10-17
> > > 17:23:41 W. Europe Daylight Time
> > > 2006-10-17 17:23:44 LOG:  Windows
> > fopen("recovery.conf","r") failed: code
> > > 2,
> > > errno 2
> > > 2006-10-17 17:23:44 LOG:  Windows
> > fopen("pg_xlog/00000001.history","r")
> > > failed: code 2, errno 2
> > > 2006-10-17 17:23:44 LOG:  Windows fopen("backup_label","r")
> > failed: code
> > > 2,
> > > errno 2
> > > 2006-10-17 17:23:44 LOG:  checkpoint record is at 0/E2ECA728
> > > 2006-10-17 17:23:44 LOG:  redo record is at 0/E2ECA728;
> > undo record is at
> > > 0/0; shutdown FALSE
> > > 2006-10-17 17:23:44 LOG:  next transaction ID: 0/514299;
> > next OID: 6276957
> > > 2006-10-17 17:23:44 LOG:  next MultiXactId: 1; next
> > MultiXactOffset: 0
> > > 2006-10-17 17:23:44 LOG:  database system was not properly
> > shut down;
> > > automatic recovery in progress
> > > 2006-10-17 17:23:44 LOG:  redo starts at 0/E2ECA778
> > > 2006-10-17 17:23:44 LOG:  unexpected pageaddr 0/DB0CC000 in
> > log file 0,
> > > segment 227, offset 835584
> > > 2006-10-17 17:23:44 LOG:  redo done at 0/E30CBE78
> > > 2006-10-17 17:23:45 LOG:  database system is ready
> > > 2006-10-17 17:23:45 LOG:  Windows=20
> fopen("global/pg_fsm.cache","rb")
> > > failed:
> > > code 2, errno 2
> > > 2006-10-17 17:23:45 LOG:  transaction ID wrap limit is
> > 2147484172, limited
> > > by database "postgres"
> > > 2006-10-17 17:23:45 LOG:  Windows
> > fopen("global/pgstat.stat","rb") failed:
> > > code 2, errno 2
> > >
> > >
> > > i've also tried to update each record on its own in a
> > for-loop. here the
> > > crash happens as well, sometimes after 10 updates,
> > sometimes after 100
> > > updates, sometimes even after 1 update. but eventually
> > every record can be
> > > updated. so i do not think its entierly content-related...
> > >
> > > for what its worth, here's the output of pg_controldata:
> > >
> > > pg_control version number:            822
> > > Catalog version number:               200609181
> > > Database system identifier:           4986650172201464825
> > > Database cluster state:               in production
> > > pg_control last modified:             17.10.2006 17:44:29
> > > Current log file ID:                  0
> > > Next log file segment:                230
> > > Latest checkpoint location:           0/E4E0F978
> > > Prior checkpoint location:            0/E46BF420
> > > Latest checkpoint's REDO location:    0/E4E03098
> > > Latest checkpoint's UNDO location:    0/0
> > > Latest checkpoint's TimeLineID:       1
> > > Latest checkpoint's NextXID:          0/531333
> > > Latest checkpoint's NextOID:          6285149
> > > Latest checkpoint's NextMultiXactId:  1 Latest checkpoint's=20
> > > NextMultiOffset:  0
> > > Time of latest checkpoint:            17.10.2006 17:43:45
> > > Minimum recovery ending location:     0/0
> > > Maximum data alignment:               8
> > > Database block size:                  8192
> > > Blocks per segment of large relation: 131072
> > > WAL block size:                       8192
> > > Bytes per WAL segment:                16777216
> > > Maximum length of identifiers:        64
> > > Maximum columns in an index:          32
> > > Date/time type storage:               floating-point numbers
> > > Maximum length of locale name:        128
> > > LC_COLLATE:                           German_Switzerland.1252
> > > LC_CTYPE:                             German_Switzerland.1252
> > >
> > > let me know if more information / data is needed.
> > >
> > > on a sidenote: are those fopen() errors
> > debug-code-leftovers or something
> > > one should worry about? i can't find those files on the=20
> file system.
> > >
> > > - thomas
> > >
> > >
> > > ---------------------------(end of
> > broadcast)---------------------------
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> > >
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> > >=20
> >=20
> >=20
> >=20
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> > broadcast)---------------------------
> > TIP 6: explain analyze is your friend
> >=20
>=20
> ---------------------------(end of=20
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>=20
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>=20