PK82553: INTERMITTENT DELAY RETURNING RESPONSE TO A CLIENT REQUEST WHEN SERVERIOTIMEOUT IS SET TO NON-ZERO VALUE

APAR status

• Closed as program error.

Error description

• When customer uses a non-zero value for the ServerIOTimeout
  option, responses to client requests are intermittently taking
  an excessive amout of time to be returned to the client. In fact
  the responses are being returned when the ServerIOTimeout value
  pops.
  

Local fix

Problem summary

• Users Affected:
  Users of the WebSphere Application Server
  V7.0 Plugin with SSL and  on all  platforms.
  
  Problem Description:*
  Responses may be delayed for a fixed
  period of 30 seconds or the current
  AppServer KeepAlive timeout
  
  Recommendation: Apply this fix if a transport in
  plugin-cfg.xml uses both SSL and
  ServerIOTimeout.
  
  Problem Summary:*
  If a non-zero ServerIOTimeout is used with an SSL transport in
  plugin-cfg.xml, the WebSphere Plugin may block at the end of a
  response under the false impression that data isn't currently
  available.   The Plugin is not unblocked until the Application
  Server closes the HTTP/1.1 keepalive connection, at which
  point the remaining data is acknowledged.
  
  Corresponding Application Server traces show that all data was
  flushed without delay.  TCP packet captures show the Plugin
  didn't unblock until an SSL close_notify or TCP FIN was
  received.
  

Problem conclusion

• Problem Conclusion:
  The WebSphere Plugin was updated to exhaust all data potentially
  buffered by the security library before performing a poll() or
  select() on the underlying socket.
  
  APAR PK82553 is currently targeted for inclusion in Service
  Level (Fix Pack) 7.0.0.7 of WebSphere Application Server V7.0
  of the WebSphere Plugin.
  
  Please refer to URL:
  //www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
  for Fix Pack availability.
  

Temporary fix

• N/A
  

Comments

APAR Information

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

  PK82147

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

Fix information

• Fixed component name

  WAS IHS 64BIT P

• Fixed component ID

  5655I3511

Applicable component levels

• R700 PSY

     UP