IT16509: TCPIP CLIENT NODES CAN LEAK CONNECTION OBJECTS IF EXPIRECONNECTIONSEC AND MINIMUMCONNECTIONS ARE CONFIGURED

APAR status

• Closed as program error.

Error description

• Message flows with TCPIP Client nodes can leak Connection
  objects if ExpireConnectionSec and MinimumConnections of
  associated TCPIPClient  configurable services are configured
  with a value greater than zero. The leak happens if the opened
  connection gets expired even before any node IS actually using
  the connection. A Java Heapdump of the DataFlowEngine shows a
  member variable of type java/util/ArrayDeque of
  com/ibm/broker/tcpip/ClientReadyForReadState object taking
  majority of the java heapspace. The java/util/ArrayDeque will
  contain large number of com/ibm/broker/tcpip/Connection objects
  in it.
  

Local fix

• Set ExpireConnectionSec as '-1' if MinimumConnections is
  configured with a positive value.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM Integration Bus using the TCPIP client nodes.
  
  
  Platforms affected:
  z/OS, MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Message flows with TCPIP client nodes can leak Connection
  objects if ExpireConnectionSec and MinimumConnections of
  associated TCPIPClient configurable service are configured with
  a value greater than zero. The leak happens if the opened
  connection gets expired even before any node is actually using
  the connection. A Java Heapdump of the DataFlowEngine shows a
  member variable of type java/util/ArrayDeque of
  com/ibm/broker/tcpip/ClientReadyForReadState object taking
  majority of the java heapspace. The java/util/ArrayDeque will
  contain large number of com/ibm/broker/tcpip/Connection objects
  in it.
  
  There are a number of resource name changes between WebSphere
  Message Broker and IBM Integration Bus Version 9.0.  For details
  visit
  http://pic.dhe.ibm.com/infocenter/wmbhelp/v9r0m0/topic/com.ibm.e
  tools.mft.doc/bb23814_.htm
  

Problem conclusion

• The product no longer leaks tcpip connection objects.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v10.0      10.0.0.9
  v9.0       9.0.0.8
  
  The latest available maintenance can be obtained from:
  http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
  
  If the maintenance level is not yet available,information on
  its planned availability can be found on:
  http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
  ---------------------------------------------------------------
  

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

  INTEGRATION BUS

• Fixed component ID

  5724J0530

Applicable component levels

• R900 PSY

     UP