IC81912: UNEXPECTED INTERMITTENT "NORMAL THROTTLING" MAY OCCUR EVEN WHEN STATUS PROVIDERS SHOW LOWER VALUES THAN CONFIGURED THRESHOLD.

APAR status

• Closed as program error.

Error description

• This system notice message may be seen:
  
  "Not permitting connection due to Normal throttling"
  
  and intermittent connection rejections may occur unexpectedly.
  
  The issue occurs even when system status providers show lower
  values than should be needed to trigger the system throttle at
  the configured threshold.
  

Local fix

• Disable the system throttle as a temporary workaround, but the
  system resources should still be manually monitored if using
  this workaround.
  
  To disable throttle, from default domain using CLI:
  
  co
  throttle
  admin-state disabled
  exit
  exit
  

Problem summary

• With throttling enabled, intermittent throttling messages might
  be seen in the log indicating that a connection has been
  rejected due to Normal throttling, even though the appliance may
  not be under heavy load or heavy memory utilization.
  
  This problem is more likely to be seen when using management
  interfaces such as retrieving operational information through
  SNMP.
  
  While the log message, "system notice   799
  0x804000a0throttle (Throttler): Not permitting connection due to
  Normal throttling." is valid under spikes in memory usage, this
  was occurring more frequently than would be expected.
  

Problem conclusion

• The fix is available in 3.8.2.12, 4.0.1.9, and 4.0.2.5.
  

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:

Fix information

• Fixed component name

  DTPWR INTGRAPL

• Fixed component ID

  DP905XI52

Applicable component levels

• R401 PSY

     UP

• R402 PSY

     UP