APAR status
Closed as program error.
Error description
Clients may reuse a persistent connection nearly simultaneously with the servers closure, resulting in POST failures. The Keep-Alive header allows the server to communicate its KeepAlive settings in terms of whole seconds to the client, but the client and server cannot reliably begin counting the interval of time at the same time. Many clients seemingly use a TTL of exactly the number of seconds the server advertises, with no fixed interval or factor removed to avoid the race. The client and server may not be counting
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM HTTP Server * **************************************************************** * PROBLEM DESCRIPTION: Add KeepAliveTimeoutDelay to help avoid * * keepalive races. * **************************************************************** * RECOMMENDATION: * **************************************************************** Add KeepAliveTimeoutDelay to help avoid keepalive races. There is a 200ms delay by default unless KeepAliveTimeout is already configured with millisecond precision.
Problem conclusion
IBM HTTP Server was updated to add KeepAliveTimeoutDelay to all a delay to be configured to help avoid keepalive races. The fix for this APAR is targeted for inclusion in IBM HTTP Serv fix packs 8.5.5.23 and 9.0.5.13. 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
PH47348
Reported component name
IBM HTTP SERVER
Reported component ID
5724J0801
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2022-06-20
Closed date
2022-08-18
Last modified date
2022-08-18
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
IBM HTTP SERVER
Fixed component ID
5724J0801
Applicable component levels
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTJ","label":"IBM HTTP Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
19 August 2022