A fix is available
APAR status
Closed as program error.
Error description
If the Fibre Channel adapter is attached to a fabric and if dynamic tracking or fast_fail is enabled and if a storage target explicitly logs out of the host just before leaving the SAN fabric, then an endless loop can occur in the Fibre Channel driver's error recovery. The host will continuously send queries to the SAN fabric name server to request information about the storage port that left the fabric. The large number of queries may monopolize traffic on the Fibre Channel link, or may overwhelm the fabric name server causing broader outages in the SAN.
Local fix
Problem summary
If the Fibre Channel adapter is attached to a fabric and if dynamic tracking or fast_fail is enabled and if a storage target explicitly logs out of the host just before leaving the SAN fabric, then an endless loop can occur in the Fibre Channel driver's error recovery. The host will continuously send queries to the SAN fabric name server to request information about the storage port that left the fabric. The large number of queries may monopolize traffic on the Fibre Channel link, or may overwhelm the fabric name server causing broader outages in the SAN.
Problem conclusion
The loop is broken by setting a flag indicating that a new login is needed later, instead of initiating the login right away.
Temporary fix
Comments
5300-10 - use AIX APAR IZ98334 5300-11 - use AIX APAR IZ98364 5300-12 - use AIX APAR IZ98122 6100-03 - use AIX APAR IZ97861 6100-04 - use AIX APAR IZ97607 6100-05 - use AIX APAR IZ97459 6100-06 - use AIX APAR IZ97398 7100-00 - use AIX APAR IZ97426
APAR Information
APAR number
IZ97459
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2011-03-28
Closed date
2011-03-28
Last modified date
2013-04-16
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 U841434
UP11/05/19 I 1000
PTF to Fileset Mapping
U841434 devices.pci.77102224.com 6.1.5.5
[{"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":"610","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":"610","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSAUMY","label":"IBM AIX Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11Q","label":"AIX 6.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
16 April 2013