Assert Failed: Page Check Error in initchunk

Posted in 2018

Summary

After restarting an Informix 11.70.FC4 instance, the server failed to come up with "Assert Failed: Page Check Error in initchunk" and "Fatal error in shared memory initialization", meaning a reserved/root chunk page failed validation. Respondents asked for the af.* diagnostic file and stack trace, noted the message "bfcheck: bad page: pg_flags 0x850 != type 0x1000", suggested using oncheck -pr to read the reserved pages, and advised opening a case with IBM support (oncheck -cDl couldn't run since shared memory wasn't initialized). The poster only supplied hex dumps; no resolution is recorded in the thread.

Auto-generated by DrWatson from the posts below — may be imperfect; read the full thread.

Topics: Storage & Space Management, Error Codes & Troubleshooting, Versions, Editions & End-of-Life

MOHAMMED TOUIRSSA — Thu, 04 Jan 2018 11:48:37 — source: IIUG Forums & Mailing Lists

Hi every bady, I have restart Informix server and now I'm not able to bring to database up : 16:14:07 IBM Informix Dynamic Server Version 11.70.FC4 Software Serial Number AAA#B000000 16:14:07 Assert Failed: Page Check Error in initchunk 16:14:07 IBM Informix Dynamic Server Version 11.70.FC4 16:14:07 Who: Session(1, informix@slnxstmaibfsbfp01.ptx.fr.sopra, 0, 0x4bc1e028) Thread(7, main_loop(), 4bbdb028, 1) File: rsdebug.c Line: 1080 16:14:07 Results: Possible inconsistencies in '(null)' 16:14:07 stack trace for pid 5846 written to /opt/informix/tmp/af.3eff33e 16:14:07 See Also: /opt/informix/tmp/af.3eff33e, shmem.3eff33e.0 16:14:08 Page Check Error in initchunk 16:14:08 oninit: Fatal error in shared memory initialization

↪ replying to MOHAMMED TOUIRSSA

Andreas — Thu, 04 Jan 2018 15:07:37 — source: IIUG Forums & Mailing Lists

/opt/informix/tmp/af.3eff33e is what hopefully is holding the details about what's wrong. Can you post its initial parts, up to 'Assert Failed'? From: "MOHAMMED TOUIRSSA" <touirsa@yahoo.fr> To: ids@iiug.org Date: 01/04/2018 12:49 PM Subject: Assert Failed: Page Check Error in initchunk [40444] Sent by: ids-bounces@iiug.org Hi every bady, I have restart Informix server and now I'm not able to bring to database up : 16:14:07 IBM Informix Dynamic Server Version 11.70.FC4 Software Serial Number AAA#B000000 16:14:07 Assert Failed: Page Check Error in initchunk 16:14:07 IBM Informix Dynamic Server Version 11.70.FC4 16:14:07 Who: Session(1, informix@slnxstmaibfsbfp01.ptx.fr.sopra, 0, 0x4bc1e028) Thread(7, main_loop(), 4bbdb028, 1) File: rsdebug.c Line: 1080 16:14:07 Results: Possible inconsistencies in '(null)' 16:14:07 stack trace for pid 5846 written to /opt/informix/tmp/af.3eff33e 16:14:07 See Also: /opt/informix/tmp/af.3eff33e, shmem.3eff33e.0 16:14:08 Page Check Error in initchunk 16:14:08 oninit: Fatal error in shared memory initialization ******************************************************************************* Forum Note: Use "Reply" to post a response in the discussion forum.

↪ replying to MOHAMMED TOUIRSSA

MARK — Thu, 04 Jan 2018 15:27:40 — source: IIUG Forums & Mailing Lists

The file /opt/informix/tmp/af.3eff33e should give you an idea what the engine is complaining about, you probably will have to open a case with tech support. oncheck -pr can read the reserved pages all the way thru t the archive pagewhich is a good thing. Mark

↪ replying to MARK

MOHAMMED — Thu, 04 Jan 2018 15:45:59 — source: IIUG Forums & Mailing Lists

cat /opt/informix/tmp/af.3eff33e | more 16:14:07 bfcheck: bad page: pg_flags 0x850 != type 0x1000 buffer header 0000000044a82b28: 00000000 00000000 00000000 00000000 ........ ........ 0000000044a82b38: 00000000 00000000 b8d18044 00000000 ........ ...D.... 0000000044a82b48: b8d18044 00000000 68592644 00000000 ...D.... hY&D.... 0000000044a82b58: c82ba844 00000000 02000000 00000000 .+.D.... ........ 0000000044a82b68: 00000000 00000000 28b0bd4b 00000000 ........ (..K.... 0000000044a82b78: 00000000 00000000 00000000 00000000 ........ ........ 0000000044a82b88: 80000000 00000000 00000000 00000000 ........ ........ 0000000044a82b98: 26040000 04000000 00002a45 00000000 &....... ..*E.... 0000000044a82ba8: 00000000 594e81c8 00000000 00000000 ....YN.. ........ 0000000044a82bb8: 00000000 00000000 00000000 00000000 ........ ........ page

↪ replying to MARK

MOHAMMED — Thu, 04 Jan 2018 15:49:23 — source: IIUG Forums & Mailing Lists

$ oncheck -cDl sgbf_light2shared memory not initialized for INFORMIXSERVER 'ol_tango'

↪ replying to MOHAMMED

DAVID JOHN — Thu, 04 Jan 2018 17:34:40 — source: IIUG Forums & Mailing Lists

Hi, Can you post the stack trace from the file? Regards, David.

↪ replying to DAVID JOHN

MOHAMMED — Fri, 05 Jan 2018 11:18:57 — source: IIUG Forums & Mailing Lists

12:30:05 bfcheck: bad page: pg_flags 0x850 != type 0x1000 buffer header 0000000044a82b28: 00000000 00000000 00000000 00000000 ........ ........ 0000000044a82b38: 00000000 00000000 b8d18044 00000000 ........ ...D.... 0000000044a82b48: b8d18044 00000000 68592644 00000000 ...D.... hY&D.... 0000000044a82b58: c82ba844 00000000 02000000 00000000 .+.D.... ........ 0000000044a82b68: 00000000 00000000 28b0bd4b 00000000 ........ (..K.... 0000000044a82b78: 00000000 00000000 00000000 00000000 ........ ........ 0000000044a82b88: 80000000 00000000 00000000 00000000 ........ ........ 0000000044a82b98: 26040000 04000000 00002a45 00000000 &....... ..*E.... 0000000044a82ba8: 00000000 594e81c8 00000000 00000000 ....YN.. ........ 0000000044a82bb8: 00000000 00000000 00000000 00000000 ........ ........ page 00000000452a0000: 26040000 0400d185 52005008 dc05d800 &....... R.P..... 00000000452a0010: 57000000 00000000 507fffff fffff0bd W....... P....... 00000000452a0020: 5b801000 78b70000 0002507f ffffffff [...x... ..P..... 00000000452a0030: f0bd5b80 1000c1b2 00000004 507fffff ..[..... ....P... 00000000452a0040: fffff0bd 5b801000 fbb20000 0005507f ....[... ......P. 00000000452a0050: ffffffff f0bd5b80 200040b7 00000006 ......[. .@..... 00000000452a0060: 507fffff fffff0bd 5b802023 6f930000 P....... [. #o... 00000000452a0070: 0007507f ffffffff f0bd5b80 20239c93 ..P..... ..[. #.. 00000000452a0080: 00000008 507fffff fffff0bd 5b802023 ....P... ....[. # 00000000452a0090: d0930000 0009507f ffffffff f0bd5b80 ......P. ......[. 00000000452a00a0: 20240eb7 0000000a 507fffff fffff0bd $...... P....... 00000000452a00b0: 5b802024 30b20000 000b507f ffffffff [. $0... ..P..... 00000000452a00c0: f0bd5b80 20245d93 0000000c 507fffff ..[. $]. ....P... 00000000452a00d0: fffff0bd 5b802024 a7930000 000d507f ....[. $ ......P. 00000000452a00e0: ffffffff f0bd5b80 2024dfb2 0000000e ......[. $...... 00000000452a00f0: 507fffff fffff0bd 5b802025 04930000 P....... [. %.... 00000000452a0100: 000f507f ffffffff f0bd5b80 20252bb2 ..P..... ..[. %+. 00000000452a0110: 00000010 507fffff fffff0bd 5b802025 ....P... ....[. % 00000000452a0120: 4d930000 0011507f ffffffff f0bd5b80 M.....P. ......[. 00000000452a0130: 20256eb2 00000012 507fffff fffff0bd %n..... P....... 00000000452a0140: 5b802025 89930000 0013507f ffffffff [. %.... ..P..... 00000000452a0150: f0bd5b80 2025a693 00000014 507fffff ..[. %.. ....P... 00000000452a0160: fffff0bd 5b802025 ceb70000 0015507f ....[. % ......P. 00000000452a0170: ffffffff f0bd5b80 2025ff93 00000016 ......[. %...... 00000000452a0180: 507fffff fffff0bd 5b802026 25930000 P....... [. &%... 00000000452a0190: 0017507f ffffffff f0bd5b80 202645b7 ..P..... ..[. &E. 00000000452a01a0: 00000018 507fffff fffff0bd 5b802026 ....P... ....[. & 00000000452a01b0: 69930000 0019507f ffffffff f0bd5b80 i.....P. ......[. 00000000452a01c0: 20268a93 0000001a 507fffff fffff0bd &...... P....... 00000000452a01d0: 5b802026 a4b20000 001b507f ffffffff [. &.... ..P..... 00000000452a01e0: f0bd5b80 2026c093 0000001c 507fffff ..[. &.. ....P... 00000000452a01f0: fffff0bd 5b802026 dcb70000 001d507f ....[. & ......P. 00000000452a0200: ffffffff f0bd5b80 2026fcb2 0000001e ......[. &...... 00000000452a0210: 507fffff fffff0bd 5b802027 1cb20000 P....... [. '.... 00000000452a0220: 001f507f ffffffff f0bd5b80 20273a93 ..P..... ..[. ':. 00000000452a0230: 00000020 507fffff fffff0bd 5b802027 ... P... ....[. ' 00000000452a0240: 55b20000 0021507f ffffffff f0bd5b80 U....!P. ......[. 00000000452a0250: 20277ab2 00000022 507fffff fffff0bd 'z...." P....... 00000000452a0260: 5b802027 97b70000 0023507f ffffffff [. '.... .#P..... 00000000452a0270: f0bd5b80 2027b593 00000024 507fffff ..[. '.. ...$P... 00000000452a0280: fffff0bd 5b802027 d0b20000 0025507f ....[. ' .....%P. 00000000452a0290: ffffffff f0bd5b80 202811b2 00000026 ......[. (.....& 00000000452a02a0: 507fffff fffff0bd 5b802028 31930000 P....... [. (1... 00000000452a02b0: 0027507f ffffffff f0bd5b80 20285493 .'P..... ..[. (T. 00000000452a02c0: 00000028 507fffff fffff0bd 5b802028 ...(P... ....[. ( 00000000452a02d0: bfb20000 0029507f ffffffff f0bd5b80 .....)P. ......[. 00000000452a02e0: 20290593 0000002a 507fffff fffff0bd ).....* P....... 00000000452a02f0: 5b802029 3cb70000 002b507f ffffffff [. )<... .+P..... 00000000452a0300: f0bd5b80 202968b2 0000002c 507fffff ..[. )h. ...,P... 00000000452a0310: fffff0bd 5b802029 95b70000 002d507f ....[. ) .....-P. 00000000452a0320: ffffffff f0bd5b80 2029b193 0000002e ......[. )...... 00000000452a0330: 507fffff fffff0bd 5b802029 d1b70000 P....... [. ).... 00000000452a0340: 002f507f ffffffff f0bd5b80 2029ef93 ./P..... ..[. ).. 00000000452a0350: 00000030 507fffff fffff0bd 5b80202a ...0P... ....[. * 00000000452a0360: 0f930000 0031507f ffffffff f0bd5b80 .....1P. ......[. 00000000452a0370: 202a2bb2 00000032 507fffff fffff0bd *+....2 P....... 00000000452a0380: 5b80202a 47b70000 0033507f ffffffff [. *G... .3P..... 00000000452a0390: f0bd5b80 202a65b7 00000034 507fffff ..[. *e. ...4P... 00000000452a03a0: fffff0bd 5b80202a 8a930000 0035507f ....[. * .....5P. 00000000452a03b0: ffffffff f0bd5b80 202aabb2 00000036 ......[. *.....6 00000000452a03c0: 507fffff fffff0bd 5b80202a cb930000 P....... [. *.... 00000000452a03d0: 0037507f ffffffff f0bd5b80 202af0b7 .7P..... ..[. *.. 00000000452a03e0: 00000038 507fffff fffff0bd 5b80202b ...8P... ....[. + 00000000452a03f0: 0fb70000 0039507f ffffffff f0bd5b80 .....9P. ......[. 00000000452a0400: 202b36b2 0000003a 507fffff fffff0bd +6....: P....... 00000000452a0410: 5b80202b 61b20000 003b507f ffffffff [. +a... .;P..... 00000000452a0420: f0bd5b80 202b8193 0000003c 507fffff ..[. +.. ...<P... 00000000452a0430: fffff0bd 5b80202b b4b20000 003d507f ....[. + .....=P. 00000000452a0440: ffffffff f0bd5b80 202bdd93 0000003e ......[. +.....> 00000000452a0450: 507fffff fffff0bd 5b80202b fdb20000 P....... [. +.... 00000000452a0460: 003f507f ffffffff f0bd5b80 202c1bb2 .?P..... ..[. ,.. 00000000452a0470: 00000040 507fffff fffff0bd 5b80202c ...@P... ....[. , 00000000452a0480: 36b70000 0041507f ffffffff f0bd5b80 6....AP. ......[.

Glossary

shared memory