A fix is available
APAR status
Closed as program error.
Error description
A tcp connection can hang and never send the last bytes
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * Systems running the 7100-00 Technology Level with * bos.net.tcp.client below the 7.1.0.23 level. **************************************************************** * PROBLEM DESCRIPTION: * An established tcp connection can hang and never send the last * bytes. This has been seen primarily on VIO Clients, when * transferring large amounts of data. * * It happens when the send for the previous packet is * ACKed all at once before the call to ip_output returns back to * tcp_output. * * To determine if you're experiencing this problem, run * 'netstat -an' in a 5 sec loop. * If you notice the Send-Q value has the same non-zero value for * the same established connection after a couple of iterations, * you may be experiencing this problem. **************************************************************** * RECOMMENDATION: * Install APAR IV33484. * Prior to fix availability, an interim fix is available from * ftp://public.dhe.ibm.com/aix/ifixes/iv33484/ ****************************************************************
Problem conclusion
TCP code is modified to record all acknowledgement recepits and make sure those last bytes were also sent. This change solves tcp hang issue
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
IV33484
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Submitted date
2012-12-14
Closed date
2012-12-14
Last modified date
2013-11-23
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
U859376
Fix information
Fixed component name
AIX V7.1
Fixed component ID
5765H4000
Applicable component levels
R710 PSY U859376
UP13/04/30 I 1000
[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"AIX 7.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
23 November 2013