A fix is available
APAR status
Closed as program error.
Error description
If the large tcp_keepidle value is used (more than 31417 if the default tcp_keepcnt and tcp_keepintvl valeus are used), then TCP connections will never be dropped even though the socket has valid SO_KEEPALIVE socket option and 8 probing packets are not acknowledged.
Local fix
When the tcp_keepidle value needs to be changed, then use the following formula to calculate the maximum value of the tcp_keepidle value. . The maximum of the tcp_keepidle value = 32767 - (( tcp_keepcnt+1)*tcp_keepintvl)
Problem summary
If the large tcp_keepidle value is used (more than 31417 with the default tcp_keepcnt and tcp_keepintvl valeus), then TCP connections will never be dropped even though the socket has valid SO_KEEPALIVE socket option and 8 probing packets are not acknowledged.
Problem conclusion
When user sets value for tcp_keepidle, the maximum value it can hold is restrictred with the following formula. The maximum of the tcp_keepidle value = 32767 - ((tcp_keepcnt+1)*tcp_keepintvl) This makes sure that connection gets dropped all the time.
Temporary fix
Comments
5300-12 - use AIX APAR IZ92922 6100-06 - use AIX APAR IV29391 6100-07 - use AIX APAR IV22417 6100-08 - use AIX APAR IV17453 7100-02 - use AIX APAR IV29844
APAR Information
APAR number
IV17453
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2012-03-19
Closed date
2012-03-19
Last modified date
2013-04-10
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 610 STD EDI
Fixed component ID
5765G6200
Applicable component levels
R610 PSY U856340
UP12/11/09 I 1000
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Document Information
Modified date:
10 April 2013