IT38376: Client application reports MQRC 2009 when using HTTP proxy between 2 MQ IPT servers

APAR status

• Closed as program error.

Error description

• When using the "Apache Rewrite" or HTTP proxy
  scenario, the connection may break in following situation:
  
  1. when putting or getting large messages
  2. when multiple applications are using same ipt route
  
  The connection is closed by Apache or HTTP
  proxy because of a protocol error and the
  application receives MQRC_CONNECTION_BROKEN (RC=2009).
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  MQIPT users who use MQIPT routes to accept HTTP data.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Incorrect serialization between MQIPT threads could cause the
  response to a HTTP POST to be sent to the requesting MQIPT
  before the HTTP POST is received by the responding MQIPT. This
  could cause problems when there were load balancers or proxies
  between the two MQIPT instances. Symptoms can include
  MQRC_CONNECTION_BROKEN when an MQ client attempts to get a
  message larger than 32KB, or when more than one client attempts
  to get messages simultaneously using the same MQIPT route.
  

Problem conclusion

• Serialization between MQIPT threads has been corrected to ensure
  that responses to HTTP POST requests are only sent once the
  request has been received.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.5
  v9.x CD    9.2.5
  
  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 is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  MQ BASE V9.2

• Fixed component ID

  5724H7281

Applicable component levels