IT23436: SSL/TLS connection ends unexpectedly, AMQ9620 and error code '5'reported in error log

APAR status

• Closed as program error.

Error description

• An SSL/TLS-enabled MQ connection fails with AMQ9620 error
  .
  AMQ9620: Internal error on call to SSL function on channel
  '????'
  EXPLANATION:
  An error indicating a software problem was returned from a
  function
  which is used to provide SSL or TLS support.
  The error code returned was '5'.
  The function call was 'gsk_secure_soc_read'.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of MQ with SSL/TLS enabled channels
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A timing window existed whereby MQ did not correctly handle
  receiving the EAGAIN error code when reading data asynchronously
  from the socket. Within this window, this error code was treated
  as an unexpected error, which terminated the connection.
  

Problem conclusion

• The MQ logic, used by both queue managers and native clients, to
  read data asynchronously from an SSL/TLS socket has been updated
  to correctly handle the EAGAIN error code in this scenrio.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.10
  v9.0 LTS   9.0.0.4
  
  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

  IBM MQ BASE MP

• Fixed component ID

  5724H7251

Applicable component levels