IT10201: MQ V8 C CLIENT FAILS WITH REASON CODE 2119 ATTEMPTING DATA CONVERSION

APAR status

• Closed as program error.

Error description

• MQ V8 C client application fails with reason code 2119
  (MQRC_NOT_CONVERTED) when
  requesting data conversion on AIX using Getmsgopts:
  MQGMO_CONVERT .
  The message length is 20800 and the application buffer is 100 MB
  (104857600).
  

Local fix

• There are a few options to resolve this problem.
  
  1 .Run the app in an environment which expands its malloc
  space. This example would let the app have three segment (1GB)
  of memory for malloc:
   export env LDR_CNTRL=MAXDATA=0x40000000 MyApp1 -m QMGR1
  
  2. Recompile the app with a bigger "maxdata" setting so
  that it can use more memory without an environment
  variable (might be good to do if #1 works but you
  don't want to have to worry about setting the
  variable every time you start the app):
  xlC_r -q32 -bmaxdata:0x40000000 MyApp2.c -o MyApp2
  So, since this is AIX, by default applications are
  limited to one segment (256 MB) of memory for malloc.
  Which is small .. See link below on
  
  AIX shared memory behavior for 32-bit applications
  
  http://www-01.ibm.com/support/docview.wss?uid=swg21651211
  or
  http://www-01.ibm.com/support/docview.wss?uid=swg21651211#Memory
  Models
  
  
  3. Change the application code to use a smaller message
  buffer than 100MB when getting MQ messages.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using applications which request messages with data
  conversion and with large buffers.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  MQGET returned with RC 2119 because of failure in allocating a
  larger buffer. However the data length was less than
  the user specified buffer length. MQ should have handled this by
  retrying the allocation using a buffer based on the data length,
  but this was not the case.
  

Problem conclusion

• MQ has been modified to retry the memory allocation based on the
  data length.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.4
  
  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 BASE MULTIP

• Fixed component ID

  5724H7251

Applicable component levels

• R800 PSY

     UP