A fix is available
APAR status
Closed as program error.
Error description
When socketpair calls are used on the system we could see a crash in socket code path (close, send, etc.) due to one of the sockets in the freelist. Stack could be something like, [00009514].simple_lock+000014 () [0049EB08]unp_disconnect@AF32_12+000228 (??, ??, ??, ??, ??) [0049C574]uipc_usrreq+0005D4 (??, ??, ??, ??, ??) [004C75A8]sodisconn+0001A8 (??) [004C6DE4]soclose2+000BE4 (??, ??) [004C8070]soclose+000010 (??) [004D2734]soo_close+000294 (??) [00630F7C]closef+00005C (??) [00547890]closefd+000150 (??, ??) [00547C44]closex+000304 (??, ??) [00547EBC]close+00011C (??) [00003850]ovlya_addr_sc_flih_main+000130 () [kdb_get_virtual_memory] no real storage @ 111694A50 [900000000B192F4]0900000000B192F4 () [kdb_read_mem] no real storage @ FFFFFFFFFFF6380 This is because the socket in unp_conn is already freed.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * Systems running the AIX 7100-00 Technology Level. * * Customers running Oracle RAC 11.2.0.3 or newer, with * Oracle Cluster Health Monitor (CHM), are likely to see * this problem. * **************************************************************** * PROBLEM DESCRIPTION: * System crash using socketpair() with a stack similar to: * * 00009514 .simple_lock+000014 () * 0049EB08 unp_disconnect@AF32_12+000228 (??, ??, ??, ??, ??) * 0049C574 uipc_usrreq+0005D4 (??, ??, ??, ??, ??) * 004C75A8 sodisconn+0001A8 (??) * 004C6DE4 soclose2+000BE4 (??, ??) * 004C8070 soclose+000010 (??) * 004D2734 soo_close+000294 (??) * 00630F7C closef+00005C (??) * 00547890 closefd+000150 (??, ??) * 00547C44 closex+000304 (??, ??) * 00547EBC close+00011C (??) * 00003850 ovlya_addr_sc_flih_main+000130 () * kdb_get_virtual_memory no real storage @ 111694A50 * 900000000B192F4 0900000000B192F4 () * kdb_read_mem no real storage @ FFFFFFFFFFF6380 * * The application involved is likely to be multithreaded. **************************************************************** * RECOMMENDATION: * Install APAR IV21131. * * Prior to APAR availability, an interim fix is available from: * ftp://public.dhe.ibm.com:/aix/ifixes/iv21131/ ****************************************************************
Problem conclusion
The code in socketpair() system call modifid so that in multithreaded environment, another thread is not able to close one of the sockets during critical pairing phase.
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
IV21131
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Submitted date
2012-05-14
Closed date
2012-05-14
Last modified date
2013-03-26
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 U851685
UP12/08/09 I 1000
PTF to Fileset Mapping
U851685 bos.mp64 7.1.0.20
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Document Information
Modified date:
26 March 2013