Fixes are available
IBM Tivoli Monitoring: Unix(R) OS Agent 18.104.22.168-TIV-ITM_UNIX-IF0001
IBM Tivoli Monitoring: Unix(R) OS Agent 22.214.171.124-TIV-ITM_UNIX-IF0004
IBM Tivoli Monitoring 6.3.0 Fix Pack 7 (6.3.0-TIV-ITM-FP0007)
IBM Tivoli Monitoring: Unix(R) OS Agent 126.96.36.199-TIV-ITM_UNIX-IF0005
IBM Tivoli Monitoring: Unix(R) OS Agent 188.8.131.52-TIV-ITM_UNIX-IF0003
IBM Tivoli Monitoring: Unix(R) OS Agent 184.108.40.206-TIV-ITM_UNIX-IF0004
Closed as program error.
The ifstat daemon becomes unresponsive due to an incomplete response of the api perfstat_netinterface. The UNIX OS Agent is composed by 7 processes: kuxagent, stat_daemon, ifstat, kuxdstat (iostat on AIX), kux_vmstat, and nfs_stat and (mount_stat - 6.23 onwards) The ifstat process is spawned by the stat_daemon and is responsible for collecting every 30s the metrics for the following attribute group: UNIXNET Details: Gather logs with the following trace in lz.ini KBB_RAS1=ERROR (UNIT:KUX ALL) (UNIT:CPU ALL) (UNIT:stat_daemon ALL) (UNIT:ifstat ALL) DEBUG_PURPOSE_ONLY=TRUE The problem occurs because: 1) the first call to perfstat_netinterface replies with 7 interfaces 2) the first call to perfstat_netinterface (to get the data) replies with ONLY 2 interfaces. So there is a clear mistmatch, which causes the issue. NOTE: The numbers may be different in each environment. The above example was recorded in the problem. Log entries: <hostname>_ux_ifstat_<timestamp>-01.log (56CF1C43.0001-1:ifstat-bsd.cpp,476,"main") 7 interfaces found between TWO messages of the same type, you can count the occurrences of the following message (56CF1C43.0025-1:ifstat-bsd.cpp,621,"main") name: In this case it was just 2 instead of 7.
Problem Summary: Monitoring Agent for UNIX OS becomes unresponsive on AIX due to an incomplete response of the AIX api perfstat_netinterface Problem Conclusion: The ifstat daemon has been fixed to manage the unexpected behavior of the AIX api perfstat_netinterface
The fix for this APAR is included in the following maintenance vehicle: | fix pack | 6.3.0-TIV-ITM-FP0007 | | interim fix | 220.127.116.11-TIV-ITM_UNIX-IF0004 | | interim fix | 18.104.22.168-TIV-ITM_UNIX-IF0005 | | interim fix | 22.214.171.124-TIV-ITM_UNIX-IF0006 | | interim fix | 126.96.36.199-TIV-ITM_UNIX-IF0007 | | interim fix | 188.8.131.52-TIV-ITM_UNIX-IF0001 | Note: Search the IBM technical support web site for maintenance package availability.
Reported component name
ITM AGENT UNIX
Reported component ID
NoSpecatt / Xsystem
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
ITM AGENT UNIX
Fixed component ID
Applicable component levels
11 May 2018