PM44187: U4087 ABEND FOR CONDITION CEE3209S IN SNMP SUBAGENT

APAR status

• Closed as fixed if next.

Error description

• A system has the SNMP SubAgent for the TCPIP stack fully
  enabled; SACONFIG ENABLED is coded in the TCPIP PROFILE (or left
  on by default) and an SNMP Agent (OSNMPD) is active.  If the
  system has been up for more than 9 months, time tags used within
  the SNMP protocol (100ths of a second) will be larger than
  2**31 - 1.  The potential exists for various SNMP queries (and
  trap conditions, such as an interface changing state) to get a
  Divide Exception (program interrupt code 0009) when calculating
  the associated time tags which will be reported as a U4087 ABEND
  in TCPIP.
  
  
  
  Other Symptoms:
  
  The Language Environment runtime may report any of several
  routines (such as sd_get_ifEntry) as being the responsible
  program.  Examination of the PSW location will be at offset
  +0001A2 in EZBIESTM, and the reported routine will be the
  caller.  The combination of lower 32 bits of registers 14 and 15
  concatenated together to form a 64 bit value will be larger than
  00001387 FFFFD8F0.
  
  After the ABEND, the SNMP SubAgent will restart and issue the
  following
  message:
  
    EZZ3202I SNMP SUBAGENT: INITIALIZATION COMPLETE
  

Local fix

• If SNMP is enabled for TCPIP, then schedule a regular recycle of
  the stack sometime before nine months has elapsed.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the IBM Communications Server   *
  *                 for z/OS Version 1 Release(s) 10, 11, 12,    *
  *                 and 13 IP: SNMP                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: TCPIP abend U4087 following divide      *
  *                      exception in module EZBIESTM            *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A TCPIP stack was configured with the SNMP SubAgent fully
  enabled and an SNMP Agent (OSNMPD) was active.  The TCPIP
  stack had been running without recycle for over 9 months.
  An ABEND0C9 in the TCPIP stack occurred when module EZBIESTM
  was called to compute a time delta (in hundredths of a second)
  and the quotient was too large after the DR assembler
  instruction (x'1DE1').  The TCPIP address space took a
  4087 abend dump.
  +-------------------------------------------------------------+
  + Please check our Communications Server for OS/390 homepages +
  + for common networking tips and fixes.  The URL for these    +
  + homepages can be found in Informational APAR II11334.       +
  +-------------------------------------------------------------+
  

Problem conclusion

Temporary fix

Comments

• This APAR is being closed FIN (Fixed If Next) with concurrence
  from the submitting customer. This means that a fix to this
  APAR is expected to be delivered from IBM in a release (if any)
  to be available within the next 36 months.
  
  This problem will be tracked as Feature F154044
  
  The solution for this APAR is included in
  CS for zOS Version 2 Release 1.
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels

• R1A0 PSN

     UP

• R1B0 PSN

     UP

• R1C0 PSN

     UP

• R1D0 PSN

     UP