IT07883: AFTER CLIENT UPGRADE TO WMQ V7.1/7.5/ 8.0 from WMQ 701 , DELAYS SEEN WITH .NET APPLICATION CONNECTIONS.

APAR status

• Closed as program error.

Error description

• After WebSphere MQ (WMQ) client upgrade from v7.0.1 to 7.1.0.x,
  significant delays seen in the connections to the queue
  manager. The application is slower running with the
  channel attribute SHARECNV set to 1 than 0. Traces show
  delays ranging from 0.04 to 0.14 of a second with the
  SHARECNV set to 0, and between 1.5 and 2.0 seconds when
  this value is set to 1.
  
  The trace files show the delay with SHARECNV =1:
  
  09:38:57.102364 pid.tid : (02)---{
  UnmanagedNmqiMQ.MQCONNX(String,MQConnectOptions,Phconn,out
  int,out int)
  09:38:57.102380 pid.tid : (03)----{
  UnmanagedNmqiMQ.MQCONNX(String,ref MQCNO,Hconn,Phconn,out
  int,out int)
  09:38:58.719703 pid.tid : The list of dlls entries for
  the current process after MQCONNX are :
  
  The connection times can increase the longer the application
  is running.
  
  The MQ .NET application trace will show delays like this
  
  00042E26 09:12:37.971737 2064.2 : (01)--{
  MQQueueManager.Connect()
  00043C6D 09:12:39.607791 2064.2 : (01)--}
  MQQueueManager.Connect() (rc=OK)
  
  01.636054 secs delay
  
  00010C34 15:31:22.653359 2064.4 : (01)--{
  MQQueueManager.Connect()
  00011A7C 15:31:24.433108 2064.4 : (01)--}
  MQQueueManager.Connect() (rc=OK)
  
  01.779749 secs delay
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users running MQ .NET applications at 7.1 or 7.5 or 8.0.
  Applications connecting in client mode and in bindings are
  affected.
  
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  The processing delay was was encountered in the OS method
  invoked in the MQ .NET code to collect the list of libraries
  loaded by the application.
  

Problem conclusion

• Since this debugging information can be collected using external
  tools such as listdlls, it does not add any additional value to
  the MQ .NET code and hence it has been removed to improve the
  performance.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.1       7.1.0.7
  v7.5       7.5.0.6
  v8.0       8.0.0.3
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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

  WMQ WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R710 PSY

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