PI52121: IN CASE OF A PARSE ERROR IN ANY OF THE SIP MESSAGES, THE TCP CON NECTION TO THE CONTAINER IS DROPPED.

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

• In case of a parse error in any of the SIP messages, the TCP
  connection to the container is dropped. Behind the TCP
  connection, could be hundreds of clients. Thus, all the
  clients would be affected.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Session Initiation Protocol (SIP)    *
  *                  Container                                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: In case of a parse error in any of      *
  *                      the SIP messages, the TCP               *
  *                      connection to the container is          *
  *                      dropped.                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  In case of a parse error in any of the SIP messages, the TCP
  connection to the container is dropped. Behind this TCP
  connection, could be hundreds of clients. Thus, all the
  clients would be affected.
  

Problem conclusion

• The fix for is tolerant to parse errors:
  Each reliable connection has a parse error counter. The parse
  error counter is initialized when the connection is established.
  In addition, each connection has a timer listener. When the
  timer listener is fired, the parse error counter is set to 0
  and the timer starts again.
  
  The fix is enabled by 3 new custom properties:
  CP name: number.of.parse.errors.allowed
  Description:
  Specifies the number of allowed parse errors before closing a
  reliable connection.
  -1 indicates never close the reliable connection on any parse
  error.
  0 indicates closing the reliable connection on any parse error
  i.e. at least 1 parse error.
  1 indicates closing the reliable connection on at least 2
  parse errors.
  In general, (n) indicates closing the reliable connection on
  at least (n+1) parse errors.
  
  Data Type: String
  Default: 0
  
  
  CP name: parse.errors.timer.interval
  Description:
  Specifies the interval, in milliseconds, in which the parse
  errors are counted per a reliable connection.
  0 and below indicates the parse errors are counted globally
  per the reliable connection.
  If the interval is running out of time, then the number of
  parse errors, per the reliable connection, is initialized.
  
  Data Type: String
  Default: 0
  
  
  CP name: max.content.length
  Description:
  Specifies the maximum content-length, in bytes, for a
  message's body.
  
  Data Type: String
  Default: 65536 (64 Kbytes)
  
  
  
  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

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

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R850 PSY

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