PI49566: WebSockets might not close the connection if sessionIdleTimeout is set

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

• WebSockets might not close the connection if
  sessionIdleTimeout is set
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty Profile - Websockets         *
  ****************************************************************
  * PROBLEM DESCRIPTION: Connection leak, therefore a memory     *
  *                      leak, may occur if the server reads     *
  *                      Websocket Close frames in fragments.    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  In rare cases a close frame coming from a client may be split
  across more than one TCP/IP data read on the server.  This can
  result
  in the websocket connection objects not being discarded at the
  server, and therefore slowly building up over time.
  

Problem conclusion

• Websocket code was change to properly deal with close frames
  that are split across more than one "read" of the TCP/IP data
  that is on the network.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack 8.5.5.9  Please refer to the Recommended Updates page for
  delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

• no
  

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

  WAS LIBERTY COR

• Fixed component ID

  5725L2900

Applicable component levels

• R855 PSY

     UP