A fix is available
APAR status
Closed as program error.
Error description
A tcp request/response style communication exchange may hang after a pure ACK packet is received and the application is about to send a new packet. An iptrace will show this type of pattern right before the exchange stops: request host1>host2 response host2>host1 ACK host1>host2 --- no further communications for this socket ---
Local fix
This is a rare condition exposed by efix for defect 882715.
Problem summary
A tcp request/response style communication exchange may hang when application is about to send a new packet and a pure ACK packet is received. Very rare timing scenario exposes this problem.
Problem conclusion
TCP code is modified to send the remaining data when this rare timing scenario occurs. Hence the tcp request/response style communication hang is avoided.
Temporary fix
Comments
6100-09 - use AIX APAR IV56021 6100-09 - use AIX APAR IV56021 6100-09 - use AIX APAR IV56021 7100-03 - use AIX APAR IV56062 7100-04 - use AIX APAR IV56086
APAR Information
APAR number
IV56062
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2014-02-28
Closed date
2014-02-28
Last modified date
2016-05-10
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
AIX V7.1
Fixed component ID
5765H4000
Applicable component levels
R710 PSY U859722
UP14/05/22 I 1000
PTF to Fileset Mapping
U859722 bos.net.tcp.client 7.1.3.15
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Document Information
Modified date:
10 May 2016