PH53475: FRAME_SIZE_ERROR IS GENERATED WHEN BOTH HTTP/2 AND COMPRESSION ARE USED

APAR status

• Closed as program error.

Error description

• When both HTTP/2 and Compression are used together, the server
  doesn't take into account the http/2 max frame size. That
  creates a FRAME_SIZE_ERROR and the server cannot send the data.
  The client is getting a blank page.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty 18.0.0.2 - 23.0.0.4          *
  *                  using HTTP/2 with http compression          *
  *                  configured on the server.xml httpendpoint.  *
  ****************************************************************
  * PROBLEM DESCRIPTION: When compression is configured in the   *
  *                      server.xml on an httpendpoint and       *
  *                      http/2                                  *
  *                      is used, the http/2 max frame size may  *
  *                      be exceeded, leading to an http/2       *
  *                      FRAME_SIZE_ERROR in the server log.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The client may observe a blank page after a request.
  If channel framework diagnostic trace is turned on, the
  following
  trace message may be seen in the log.
  H2StreamProce 3 processNextFrame: DATA received on stream 1 is
  not a valid frame: FRAME_SIZE_ERROR
  

Problem conclusion

• While using HTTP/2 with compression configured on the
  httpendpoint, the HTTP/2 max frame size should not be exceeded.
  
  The fix for this APAR is targeted for inclusion in Liberty fix
  pack 23.0.0.5. For more information, see 'Recommended Updates fo
  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

  LIBERTY PROFILE

• Fixed component ID

  5724J0814

Applicable component levels