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IT23519: Failure to get message through an SSL/TLS channel with compression enabled

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APAR status

  • Closed as program error.

Error description

  • MQ client/server fails to get a message through an SSL/TLS
channel with compression enabled
The following error is reported on the client side:
    Probe Id          :- RM504002
    Component         :- rriDecompress
    -----------------------------------
    MQM Function Stack
    MQGET
    MQGET
    reqMakeCall
    rriDecompress
    xcsFFST

Local fix

  • Disable compression on the channel

Problem summary

  • ****************************************************************
USERS AFFECTED:
All the post- v8 client/server receiving messages from pre- v8
client/server


Platforms affected:
MultiPlatform

****************************************************************
PROBLEM DESCRIPTION:
When using SSL/TLS clients earlier than MQ v8, a logic error
meant that an incorrect maximum transmission size was negotiated
between the client and server when using compression. This could
cause the connection to fail, as insufficient space was
available to store the decompressed data.

Problem conclusion

  • The MQ queue manager has been modified to negotiate an
appropriate maximum transmission size when dealing with clients
using compression.

---------------------------------------------------------------
The fix is targeted for delivery in the following PTFs:

Version    Maintenance Level
v8.0       8.0.0.10
v9.0 LTS   9.0.0.5

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 number
    IT23519
    • 

  • Reported component name
    IBM MQ BASE MP
    • 

  • Reported component ID
    5724H7251
    • 

  • Reported release
    800
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2017-12-15
    • 

  • Closed date
    2018-04-27
    • 

  • Last modified date
    2018-04-27
    • 





    

  • 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
    IBM MQ BASE MP
    • 

  • Fixed component ID
    5724H7251
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0.0.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            27 April 2018
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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