IT39697: IT IS NOT POSSIBLE TO RECEIVE THE RECEIVE BUFFER SIZE FOR TLS SOCKETS

APAR status

• Closed as new function.

Error description

• It is not possible to customise the receive buffer size for TLS
  sockets created by the Integration Server. For use cases that
  involve receiving large amount of BLOB data over TLS, for
  example as the response to a HTTPRequest Node request this can
  lead to unnecessary performance degradation.
  
  
  This fix introduces the environment variable
  MQSI_MBSSLSOCKET_RECV_BUFFER_SIZE, when set to an integer value
  this allows the user to determine the receive buffer size used
  in bytes.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of App Connect Enterprise version 11 or 12 making
  outbound TLS conenctions, for example by using the HTTP or
  SOAPRequest Nodes of the TCPIP Client nodes.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  <span style="background-color:rgb(255, 255, 255)">It is not
  possible to customise the receive buffer size for TLS sockets
  created by the Integration Server.
  For use cases that involve receiving a large amount of BLOB data
  over TLS, for example, as the response to an HTTPRequest Node
  request this can lead to unnecessary performance
  degradation.</span>
  

Problem conclusion

• <span style="background-color:rgb(255, 255, 255)">This fix
  introduces the tcpTLSBufferSize property to the
  SocketConnectionManager resource manager in the server.conf.yaml
  file. When set to a positive integer value this allows the user
  to control the size of the receive buffer used when making
  outbound TLS socket connection. For example</span>
  
  
  SocketConnection Manager:
     tcpTLSBufferSize 1000000 # Set the receive buffer size to use
  for TLS operations
  <span style="background-color:rgb(255, 255, 255)">
  This fix also introduces the environment variable
  MQSI_MBSSLSOCKET_RECV_BUFFER_SIZE, when set to an integer value
  this allows the user to determine the receive buffer size used
  in bytes.      </span>
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v11.0      11.0.0.17
  v12.0      12.0.4.0
  
  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

  APP CONNECT ENT

• Fixed component ID

  5724J0550

Applicable component levels