PI38116: Provide option to not flush internal response objects in FileServletWrapper.

8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• An SRVE8094W warning can occur when the application sets the
  header on a response which has already been flushed by the
  server.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server Full       *
  *                  Profile and Liberty profile version 8.5.5   *
  *                  users.                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: An SRVE8094W warning occurs when the    *
  *                      application sets the header on a        *
  *                      response which has already been         *
  *                      flushed by the server.                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An application resource is setting the header of an inbound
  response to a static file (.html, .txt, etc.), but the server
  has called flush() on the response while exiting the handling
  of the file service. This is causing the following error to be
  thrown:
  com.ibm.ws.webcontainer.srt.SRTServletResponse setHeader
  SRVE8094W: WARNING: Cannot set header. Response already
  committed
  

Problem conclusion

• The WebContainer code has been modified to only invoke a flush
  on the inbound response if it has been wrapped in an external
  response object when a new WebContainer custom property is set.
  
  A new WebContainer custom property needs to be set to enable
  this behavior:
  Name:
  com.ibm.ws.webcontainer.invokeFlushAfterServiceForStaticFile
  Values: false / true (default)
  
  Please refer to the following technote for instructions on
  enabling WebContainer custom properties:
  Full profile:
  http://www.ibm.com/support/docview.wss?rss=180&uid=swg21284395
  Liberty profile:
  http://www-01.ibm.com/support/docview.wss?uid=swg21597753
  
  The fix for this APAR is currently targeted for inclusion in
  fixpack 8.5.5.7.
  Please refer to the recommended updates page for delivery
  information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

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

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels

• R850 PSY

     UP