INFORMIX 14.10.FC10 on Ubuntu 22.04:
No Problem.
I get the XML and at the end:
1 row(s) retrieved.
Mit freundlichen Grüßen - Kind regards
Gerd Kaluzinski
Consultant Software Services
IBM Expert Labs DACH, Data & AI
Phone: +49 175 228 1983
EMail: gerd.kaluzinski@de.ibm.com
IBM Deutschland GmbH
Vorsitzender des Aufsichtsrats: Sebastian Krause
Geschäftsführung: Gregor Pillen (Vorsitzender), Nicole Reimer, Gabriele Schwarenthorer, Christine Rupp, Frank Theisen
Sitz der Gesellschaft: Ehningen / Registergericht: Amtsgericht Stuttgart, HRB 14562 / WEEE-Reg.-Nr. DE 99369940
Original Message:
Sent: 3/11/2024 7:03:00 AM
From: Dennis Melnikov
Subject: RE: Assert Warning: Memory block header corruption detected in mt_realloc 2
Andreas,
To reproduce,
CREATE TEMP TABLE tmp_osa5632 (
line_id INTEGER,
line_num INTEGER,
item_num CHAR(10),
qty CHAR(10),
is_damage CHAR(1),
is_cross_docking SMALLINT,
mark_chz CHAR(1)
) WITH NO LOG;
LOAD FROM 'osa-5632.unl' DELIMITER "|" INSERT INTO tmp_osa5632;
SELECT genxmlclob(row(line_id, line_num, item_num, qty, is_damage, is_cross_docking, mark_chz),"line")
FROM (SELECT line_id, line_num, TRIM(item_num) AS item_num, TRIM(qty) AS qty, TRIM(is_damage) AS is_damage, is_cross_docking, mark_chz
FROM tmp_osa5632 ORDER BY line_id);
First, save it to 'osa-5632.unl':
865147945|1|256112|10|\ |||
865147946|2|856689|11|\ |||
865147947|3|1021606|41|\ |||
865147948|4|1061718|50|\ |||
865147949|5|1495398|57|\ |||
865147950|6|1495408|64|\ |||
865147951|7|1613576|2|\ |||
865147952|8|933324|52|\ |||
865147953|9|933325|43|\ |||
865147954|10|933327|41|\ |||
865147955|11|933329|59|\ |||
865147956|12|1258553|229|\ |||
865147957|13|877410|33|\ |||
865147958|14|26917|4|\ |||
865147959|15|1472044|3|\ |||
865147960|16|1079352|104|\ |||
865147961|17|1195820|4|\ |||
865147962|18|762|89|\ |||
865147963|19|882896|77|\ |||
865147964|20|517148|5|\ |||
865147965|21|328755|9|\ |||
865147966|22|964109|6|\ |||
865147967|23|964108|6|\ |||
865147968|24|964107|6|\ |||
865147969|25|964106|13|\ |||
865147970|26|867261|30|\ |||
865147971|27|867249|127|\ |||
865147972|28|166832|1|\ |||
865147973|29|1136178|116|\ |||
865147974|30|147841|18|\ |||
865147975|31|882894|101|\ |||
865147976|32|262865|34|\ |||
865147977|33|198685|22|\ |||
865147978|34|129|46|\ |||
865147979|35|1547354|109|\ |||
865147980|36|112336|6|\ |||
865147981|37|1111999|10|\ |||
865147982|38|1442|7|\ |||
865147983|39|901708|166|\ |||
865147984|40|901702|31|\ |||
865147985|41|901704|5|\ |||
865147986|42|1113840|9|\ |||
865147987|43|737053|12|\ |||
865147988|44|1348206|7|\ |||
865147989|45|906433|81|\ |||
865147990|46|900306|79|\ |||
865147991|47|1384140|123|\ |||
865147992|48|809697|12|\ |||
865147993|49|274113|35|\ |||
865147994|50|916920|40|\ |||
865147995|51|891642|44|\ |||
865147996|52|115676|15|\ |||
865147997|53|1153854|4|\ |||
865147998|54|127651|30|\ |||
865147999|55|1467018|111|\ |||
865148000|56|882891|1|\ |||
865148001|57|257232|17|\ |||
865148002|58|76130|30|\ |||
865148003|59|129819|119|\ |||
865148004|60|1556510|44|\ |||
865148005|61|949924|2|\ |||
865148006|62|201928|13|\ |||
865148007|63|396998|2|\ |||
865148008|64|650136|5|\ |||
865148009|65|979412|14|\ |||
865148010|66|979413|14|\ |||
865148011|67|144630|60|\ |||
865148012|68|1277748|21|\ |||
865148013|69|730859|14|\ |||
865148014|70|730858|6|\ |||
865148015|71|266552|29|\ |||
865148016|72|27258|10|\ |||
865148017|73|1121495|7|\ |||
865148018|74|52638|25|\ |||
865148019|75|1202371|11|\ |||
865148020|76|1226617|7|\ |||
865148021|77|892707|26|\ |||
865148022|78|633901|117|\ |||
865148023|79|954118|51|\ |||
865148024|80|916459|51|\ |||
865148025|81|916461|18|\ |||
865148026|82|916460|11|\ |||
865148027|83|1471178|7|\ |||
865148028|84|10018|1|\ |||
865148029|85|710171|39|\ |||
865148030|86|47585|66|\ |||
865148031|87|1479872|12|\ |||
865148032|88|76335|1|\ |||
865148033|89|926648|15|\ |||
865148034|90|33177|28|\ |||
865148035|91|1243049|28|\ |||
865148036|92|1203507|36|\ |||
865148037|93|1547365|44|\ |||
865148038|94|1547364|44|\ |||
865148039|95|34468|17|\ |||
865148040|96|254660|2|\ |||
865148041|97|1647993|2|\ |||
865148042|98|901703|112|\ |||
865148043|99|919791|33|\ |||
865148044|100|50718|10|\ |||
865148045|101|434191|415|\ |||
865148046|102|934504|1|\ |||
865148047|103|1742607|4|\ |||
865148048|104|148250|50|\ |||
865148049|105|1252582|17|\ |||
865148050|106|146162|11|\ |||
865148051|107|491330|268|\ |||
865148052|108|263350|70|\ |||
865148053|109|107250|27|\ |||
865148054|110|198|15|\ |||
865148055|111|601885|3|\ |||
865148056|112|253736|29|\ |||
865148057|113|392958|10|\ |||
865148058|114|73647|2|\ |||
865148059|115|965722|50|\ |||
865148060|116|19757|30|\ |||
865148061|117|33055|3|\ |||
865148062|118|1675999|13|\ |||
865148063|119|257241|22|\ |||
865148064|120|347861|9|\ |||
865148065|121|917380|36|\ |||
865148066|122|901705|4|\ |||
865148067|123|1752211|1|\ |||
865148068|124|874769|10|\ |||
865148069|125|1593980|4|\ |||
------------------------------
Sincerely,
Dennis
------------------------------
Original Message:
Sent: Fri March 08, 2024 04:27 AM
From: Andreas Legner
Subject: Assert Warning: Memory block header corruption detected in mt_realloc 2
Provided a reproduction, this could be tried with a recent Informix version.
------------------------------
Andreas Legner
Original Message:
Sent: Thu March 07, 2024 01:52 PM
From: Dennis Melnikov
Subject: Assert Warning: Memory block header corruption detected in mt_realloc 2
Our further investigation proved we have encountered an apparent Informix's bug, i.e. the AF is triggered by the order rows lie in the set--the query succeeds if the order is reversed.
------------------------------
Sincerely,
Dennis
Original Message:
Sent: Fri March 01, 2024 10:32 AM
From: Dennis Melnikov
Subject: Assert Warning: Memory block header corruption detected in mt_realloc 2
Hi,
IBM Informix Dynamic Server Version 11.70.FC5XE
We got the following warnings:
17:58:53 Assert Warning: Memory block header corruption detected in mt_realloc 2
17:58:53 IBM Informix Dynamic Server Version 11.70.FC5XE
17:58:53 Who: Session(5284871, sap_xi@pfp-app1, 0, 70000423f9c9f08)
Thread(58573054, sqlexec, 70000449bf0d068, 13)
File: mtshpool.c Line: 2988
17:58:53 Results:
17:58:53 Action: Please notify IBM Informix Technical Support.
17:58:53 stack trace for pid 13697538 written to /tmp/af.c4e6ed2d
/tmp/af.c4e6ed2d is as follows:
17:58:53 Found during mt_realloc 2
17:58:53 Pool 'EXE.5284871' (0x700004f954b7040)
17:58:53 Bad block header 0x700004bcb9f0028
blk-64
0700004bcb9effe8: 3422206c 696e655f 6e756d3d 22313030 4" line_ num="100
0700004bcb9efff8: 22206974 656d5f6e 756d3d22 35303731 " item_n um="5071
0700004bcb9f0008: 38222071 74793d22 31302220 69735f64 8" qty=" 10" is_d
0700004bcb9f0018: 616d6167 653d2222 2f3e0a3c 6c696e65 amage="" />.<line
blk+64
0700004bcb9f0028: 0000009b 60ea6081 ffff04e0 008008c1 ....`.`. ........
0700004bcb9f0038: 0700004f 954b70a8 0700004b cb9ee000 ...O.Kp. ...K....
0700004bcb9f0048: 00000000 00000fd8 0700004f 954b70e8 ........ ...O.Kp.
0700004bcb9f0058: 0700004f 954b70e8 0e00009f 2a96e1d1 ...O.Kp. ....*...
17:58:53 Bad block removed from pool
17:58:53 Attempting to clean up free list...
17:58:53 Bad free block 0x700004bcb9f0050
blk-64
0700004bcb9f0010: 31302220 69735f64 616d6167 653d2222 10" is_d amage=""
0700004bcb9f0020: 2f3e0a3c 6c696e65 0000009b 60ea6081 />.<line ....`.`.
0700004bcb9f0030: ffff04e0 008008c1 0700004f 954b70a8 ........ ...O.Kp.
0700004bcb9f0040: 0700004b cb9ee000 00000000 00000fd8 ...K.... ........
blk+64
0700004bcb9f0050: 0700004f 954b70e8 0700004f 954b70e8 ...O.Kp. ...O.Kp.
0700004bcb9f0060: 0e00009f 2a96e1d1 0700004b cb9f00b0 ....*... ...K....
0700004bcb9f0070: 0700004b cb9f00f0 00000000 00000000 ...K.... ........
0700004bcb9f0080: 00000000 00000000 0e00009b 60ea8049 ........ ....`..I
17:58:53 Bad free block removed from pool
17:58:53
17:58:53 IBM Informix Dynamic Server Version 11.70.FC5XE Software Serial Number AAA#B000000
17:58:53 Assert Warning: Memory block header corruption detected in mt_realloc 2
17:58:53 Who: Session(5284871, sap_xi@pfp-app1, 0, 70000423f9c9f08)
Thread(58573054, sqlexec, 70000449bf0d068, 13)
File: mtshpool.c Line: 2988
17:58:53 Results:
17:58:53 Action: Please notify IBM Informix Technical Support.
17:58:53 Raw hex dump of stack located in /tmp/af.c4e6ed2d.rawstk
17:58:53 Stack for thread: 58573054 sqlexec
base: 0x0700004410659000
len: 135168
pc: 0x0000000100096cec
tos: 0x0700004410675800
state: running
vp: 13
0x0000000100096a98 (oninit)afstack
0x000000010009603c (oninit)afhandler
0x00000001000963ec (oninit)afwarn_interface
0x0000000100068294 (oninit)mt_realloc
0x00000001001d4ee8 (oninit)mi_realloc
0x0000000100556fe4 (oninit)genxml
0x000000010055fc50 (oninit)iter_aggrxmlc
0x0000000100dddb1c (oninit)udrlm_clang_execute_internal
0x0000000100ddd728 (oninit)udrlm_clang_execute
0x00000001013c5550 (oninit)udrlm_exec_routine
0x000000010061c72c (oninit)udr_execute
0x00000001005507b0 (oninit)sqexop
0x00000001013a0320 (oninit)compagg
0x000000010139ef70 (oninit)updategrpcols
0x000000010139bb88 (oninit)process_non_groupby
0x0000000101398e54 (oninit)group_open
0x000000010068c460 (oninit)prepselect
0x00000001002ca0d0 (oninit)subqprep
0x00000001002c8fe8 (oninit)exsubq
0x000000010083d868 (oninit)ev_cb
0x0000000100833c10 (oninit)new_eval
0x000000010069f548 (oninit)IPRA.$ip_evalexpr
0x000000010069caec (oninit)runproc
0x00000001006b1dfc (oninit)udrlm_spl_execute
0x00000001013c5508 (oninit)udrlm_exec_routine
0x000000010061c72c (oninit)udr_execute
0x00000001006adeb4 (oninit)udr_spl_curnext
0x00000001006adb04 (oninit)ip_curnext
0x00000001006add50 (oninit)ip_fetch
0x0000000100689754 (oninit)getrow
0x000000010068acd8 (oninit)fetchrow
0x0000000100737b44 (oninit)exfetch
0x00000001001fb024 (oninit)sql_nfetch
0x00000001001fa808 (oninit)sq_nfetch
0x00000001004889c0 (oninit)sqmain
0x00000001009f8cd4 (oninit)listen_verify
0x00000001009f7d88 (oninit)spawn_thread
0x0000000101489440 (oninit)startup
17:58:53 See Also: /tmp/af.c4e6ed2d
---------------------------------
Begin System Alarm Program Output
---------------------------------
Assertion Failure Type: Warning
Host Name: elids5
Database Server Name: elids5
Time of failure: Fri Mar 1 17:58:53 MSK 2024
AF file: /tmp/af.c4e6ed2d
Shared memory file: None
System Blocking: OFF
-------------------------------
End System Alarm Program Output
-------------------------------
17:58:53 sh /opt/informix/11.70fc5xe/etc/evidence.sh 1 0 /tmp/af.c4e6ed2d 5284871 0x70000449bf0d068 58573054 0x700005161e61220 1025 0 0 0 0
17:58:53
------------------ End of assertion failure 0 -----------------
A failing query that causes the warning is:
SELECT genxml(row(line_id, line_num, item_num, qty, is_damage, is_cross_docking, mark_chz),"line")
<...>
Does genxml() have any tips and tricks to tune?
------------------------------
Sincerely,
Dennis
------------------------------