PH30270: ALLOW SSL IOVEC MERGING TO BE DISABLED

APAR status

• Closed as program error.

Error description

• By default, IHS merges multiple SSL writes into a single call
  to sendv() but this is suspected of causing a problem. It
  should be possible to disable.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM HTTP Server                *
  ****************************************************************
  * PROBLEM DESCRIPTION: By default, IHS merges multiple SSL     *
  *                      writes into a single call               *
  *                      to sendv(). For diagnostic purposes,    *
  *                      provide a way to disable.               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  By default, IHS merges multiple SSL writes into a single call
  to sendv(). For diagnostic purposes, provide a way to disable.
  

Problem conclusion

• If native environment variable "IHS_NO_SSL_SEND_MERGE" is
  set, merging of multiple small writes into a single sendv()
  will not be done.  This should only be enabled if
  recommended by IBM support.
  
  The fix for this APAR is targeted for inclusion in IBM HTTP
  Server fix packs 8.5.5.19 and 9.0.5.7. For more information,
  see 'Recommended Updates for WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

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 HTTP SERVER

• Fixed component ID

  5724J0801

Applicable component levels