IV85368: DIAGNOSTICS FOR PIPE_LISTENER SUSPEND/RESUME LOGIC

6.3.0.7-TIV-ITM_TEMA-IF0007

IBM Tivoli Monitoring 6.3.0 Fix Pack 7 Service Pack 1 (6.3.0.7-TIV-ITM-SP0001)

APAR status

• Closed as program error.

Error description

• Environment:
  This defect is common to all supported Tivoli Monitoring
  platforms.
  
  Problem Description:
     There can be instances in which ECONNABORTED status is
  delivered to our TCPIP connection server because the server has
  received a RST for an ESTABLISHED connection before SocketAccept
  is called. In these instances, the pipe listener can be
  'suspended' until a  successful SocketAccept is received from
  the endpoint sending RST.
  
     This APAR implements Basic Service's environment variable
  KDEB_TRACE_ACCEPT.  The default is KDEB_TRACE_ACCEPT=NO . When
  KDEB_TRACE_ACCEPT=YES is configured, diagnostic messages
  regarding the origin (IP address) of the RST packet are issued
  to the RAS1 log along with messages indicated whether the pipe
  operation is suspended or resumed.  The scope of the pipe
  suspend is PROTOCOL: an IOERROR of type ECONNABORTED on an
  IP.PIPE session will suspend all IP.PIPE traffic until a
  successful SocketAccept is performed.
  
  Detailed Recreation Procedure:
    This problem was recreated using simulation code with name
    floodTCP4.c
  
  Related Files and Output:
    The signature of this failure can be seen in the RAS1 log as
  Status 1DE0000D=KDE1_STC_IOERROR=72: NULL
  

Local fix

Problem summary

• Diagnostics for  pipe_listener SUSPEND / RESUME logic
  
  
  There can be instances in which ECONNABORTED status is delivered
  to our TCPIP connection server because the server has received
  a RST for an ESTABLISHED connection before SocketAccept is
  called.  In these instances, the pipe listener can be
  'suspended' until a  successful SocketAccept is received from
  the endpoint sending RST.
  

Problem conclusion

• Install Action:
  ---------------
  This APAR implements Basic Service's environment variable
  KDEB_TRACE_ACCEPT.  The default is KDEB_TRACE_ACCEPT=NO .
  
  When KDEB_TRACE_ACCEPT=YES is configured, diagnostic messages
  regarding the origin (IP address) of the RST packet are issued
  to the RAS1 log along with messages indicated whether the pipe
  operation is suspended or resumed.  The scope of the pipe
  suspend is PROTOCOL: an IOERROR of type ECONNABORTED on an
  IP.PIPE session will suspend all IP.PIPE traffic until a
  successful SocketAccept is performed.
  
  
  The fix for this APAR is contained in the following maintenance
  packages:
  
     | service pack | 6.3.0.7-TIV-ITM-SP0001
  

Temporary fix

Comments

APAR Information

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

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

  IJ10762 OA56404

Fix information

• Fixed component name

  TEMS

• Fixed component ID

  5724C04MS

Applicable component levels