A fix is available
APAR status
Closed as program error.
Error description
Two threads of a multi threaded application my deadlock with one thread in dup2() and the other in pollset_ctl(). The stack traces of the two threads will be [002F7408]slock+0006A4 (0000000000009034, 80000000000090B2 [??]) [00009558].simple_lock+000058 () [0046EE58]pcache_list_lock+000028 () [0046FAB0]pollcache_close+00003C (??) [003CD144]closefd+000144 (??, ??) [003CD40C]closex+000288 (??, ??) [004F7868]kfcntl+000C20 (??, ??, ??) [00003810].svc_instr+000110 () and [00054140]e_block_thread+0004E0 () [00054830]e_sleep_thread+00005C (??, ??, ??) [00413478]_getf_threaded+000108 (??, ??, ??) [0046F634]pcache_poll_pccb+000058 (??, ??, ??) [0046F4B4]pcache_activate_pccb+000044 (??, ??, ??) [0046FE48]pollcache_add+000104 (??, ??, ??) [00471624]pollset_ctl+0001F4 (??, ??, ??) [00003810].svc_instr+000110 ()
Local fix
Problem summary
Applicaiton or system hang with folowing stack trace 00054140 e_block_thread+0004E0 () e_sleep_thread+00005C (??, ??, ??) _getf_threaded+000108 (??, ??, ??) pcache_poll_pccb+000058 (??, ??, ??) pcache_activate_pccb+000044 (??, ??, ??) pollcache_add+000104 (??, ??, ??) pollset_ctl+0001F4 (??, ??, ??) .svc_instr+000110 () And other thread possibly doing closefd()
Problem conclusion
Make pollset_ctl threads to check on fd status before doing any pollset_ctl operations
Temporary fix
Comments
5300-09 - use AIX APAR IZ80480 5300-10 - use AIX APAR IZ80481 5300-11 - use AIX APAR IZ73507 5300-12 - use AIX APAR IZ80482 6100-02 - use AIX APAR IZ80484 6100-03 - use AIX APAR IZ75841 6100-04 - use AIX APAR IZ81358 6100-05 - use AIX APAR IZ80485 6100-06 - use AIX APAR IZ80488 6100-06 - use AIX APAR IZ80486 6100-06 - use AIX APAR IZ80488 7100-00 - use AIX APAR IZ80489
APAR Information
APAR number
IZ80484
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2010-07-19
Closed date
2010-07-19
Last modified date
2013-03-27
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
U839853
Fix information
Fixed component name
AIX 610 STD EDI
Fixed component ID
5765G6200
Applicable component levels
R610 PSY U839853
UP10/10/19 I 1000
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Document Information
Modified date:
17 December 2021