APAR status
Closed as program error.
Error description
IHS child process fails with message CRIHS0003E or system console reports IPCMSGNIDS shortage KEYWORDS: IPCMSGNIDS
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM HTTP Server on zOS * **************************************************************** * PROBLEM DESCRIPTION: If IHS has experienced many crashes and * * no system IPL, new child processes may * * fail due to exhausting IPCMSGNIDS. * **************************************************************** * RECOMMENDATION: * **************************************************************** Each IHS child process uses a single SysV Message Queue. Normally message queues are used for inter-process communication, but IHS on zOS uses them in an obscure intra- process purpose to integrate with the asyncio() callable service. On normal termination, the message queue is deleted. During an abend, this termination does not happen and the queue is leaked. This is because message queues are intended for IPC and would normally outlive any individual process.
Problem conclusion
The code was updated in the following ways: 1. Each IHS child process tells the IHS parent process the identifier of the message queue used by each child. 2. The parent already knows when children exit and if it was due to a fatal signal. The parent process was modified to remove the message queue used by a child that crashes due to SIGSEGV, SIGBUS, SIGABRT, and SIGKILL. The fix for this APAR is targeted for inclusion in IBM HTTP Server fix packs 8.5.5.25 and 9.0.5.18. For more information, see 'Recommended Updates for WebSphere Application Server': https://www.ibm.com/support/pages/node/715553
Temporary fix
Comments
APAR Information
APAR number
PH56093
Reported component name
WAS IHS ZOS
Reported component ID
5655I3510
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2023-07-28
Closed date
2023-08-02
Last modified date
2023-08-02
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
WAS IHS ZOS
Fixed component ID
5655I3510
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0.0.0","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
16 August 2023