APAR status
Closed as program error.
Error description
Consider this entry in /etc/sysctl.conf on linux x86_64: fs.aio-max-nr = 6000000 Propagate the setting: sysctl -p /etc/sysctl.conf If you set the env variable KAIOON=500000, the server will fail with following when you try to bring it online: There appears to be an undoc'ed hard-coded OS value that is limiting the server despite KAIOON being less than fs.aio-max-nr: 11:58:23 requested number of KAIO events (5000000) exceeds limit (3000000). using 3000000. 11:58:23 Assert Failed: initializing KAIO failed 11:58:23 IBM Informix Dynamic Server Version 12.10.FC7 11:58:23 Who: Session(1, login@host, 0, (nil)) Thread(137, kaio, 0, 1) File: kaioapi.c Line: 298 11:58:23 Results: io_queue_init(3000000) failed returning -22, errno = 0 11:58:23 stack trace for pid 21255 written to /tmp/af.471dbbe 11:58:23 See Also: /tmp/af.471dbbe 11:58:27 initializing KAIO failed 11:58:28 io_queue_init(3000000) failed returning -22, errno = 0 11:58:28 Assert Failed: kaiothread() ERROR A similar error can be observed for a lower value of KAIOON (1500000): 12:18:23 Assert Failed: initializing KAIO failed 12:18:23 IBM Informix Dynamic Server Version 12.10.FC7 12:18:23 Who: Session(1, login@host, 0, (nil)) Thread(113, kaio, 0, 1) File: kaioapi.c Line: 298 12:18:23 Results: io_queue_init(1500000) failed returning -22, errno = 0 12:18:23 stack trace for pid 22650 written to /tmp/af.459e06e 12:18:23 See Also: /tmp/af.459e06e 12:18:25 initializing KAIO failed 12:18:25 io_queue_init(1500000) failed returning -22, errno = 0 12:18:25 Assert Failed: kaiothread() ERROR For both cases the stack of the asserting thread is: 12:18:23 Stack for thread: 113 kaio base: 0x000000004827f000 len: 69632 pc: 0x00000000013cf857 tos: 0x000000004828f090 state: running vp: 1 0x00000000013cf857 (oninit) afstack 0x00000000013d29ee (oninit) afhandler 0x00000000013d2e62 (oninit) affail_interface 0x0000000001427e21 (oninit) _aioinit 0x00000000013c1460 (oninit) kaiothread 0x0000000001428327 (oninit) startup
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC14 and 14.10.xC4. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Update to Informix Server 12.10.xC14 or 14.10.xC4. * ****************************************************************
Problem conclusion
Fixed in Informix Server 12.10.xC14 and 14.10.xC4.
Temporary fix
Comments
APAR Information
APAR number
IT30983
Reported component name
INFORMIX SERVER
Reported component ID
5725A3900
Reported release
C10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-11-18
Closed date
2020-06-08
Last modified date
2020-06-08
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
INFORMIX SERVER
Fixed component ID
5725A3900
Applicable component levels
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSGU8G","label":"Informix Servers"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Line of Business":{"code":"LOB10","label":"Data and AI"}}]
Document Information
Modified date:
10 June 2020