PM30231: MISSING PATH TO RECTIFY COLLISION OF SHORT VP IDS

APAR status

• Closed as program error.

Error description

• Every virtual portal (VP) has an internally assigned short
  ID that is incorporated into the Object ID of all resources
  belonging to that VP. The short ID is a 16-bit value
  generated from the host name or URL mapping of the VP by means
  of an MD2 hash algorithm. Although the short ID allows for
  2**16-1 combinations, there is the odd chance of a collision of
  short IDs for two separate VP if their host names or URL
  mappings, respectively, result in identical short IDs.
  

Local fix

• The short ID is dependent on either the host name or URL
  mapping for the VP. Thus, by changing the host name or the URL
  mapping even in only small way, the collision of the short is
  usually resolved.
  

Problem summary

• Every virtual portal (VP) has an internally assigned short ID
  that is incorporated into the Object ID of all resources
  belonging to that VP. The short ID is a 16-bit value generated
  from the host name or URL mapping of the VP by means of an MD2
  hash algorithm. Although the short ID allows for 2**16-1
  combinations, there is the odd chance of a collision of short
  IDs for two separate VP if their host names or URL mappings,
  respectively, result in identical short IDs.
  

Problem conclusion

• This APAR provides the means to set the short ID explicitly.
  When creating a VP through the create-virtual-portal task add
  the following property to the wkplc.properties:
  
        VirtualPortalID = <id>
  
  where id can take any value between -32768 and 32767 not already
  assigned to another VP. Use the list-all-virtual-portals task to
  identify which short IDs have already been assigned. (Hostnames
  will show as "<cannot be retrieved>" as these are currently not
  available through the scripting interface. The respective API
  change is still in progress.)
  
  Manual Steps:
     None
  
  Platform Specific:
     This fix applies to all platforms.
  
  PM30231 is part of Cumulative Fix 13 - available on Fix Central.
  
  Portal 6.1.0.3 / 6.1.5.0:
  http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
  r?apar=PM33723&productid=WebSphere%20Portal&brandid=5
  
  Portal 6.1.0.4 / 6.1.5.1:
  http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
  r?apar=PM33732&productid=WebSphere%20Portal&brandid=5
  
  Portal 6.1.0.5 / 6.1.5.2:
  http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
  r?apar=PM33742&productid=WebSphere%20Portal&brandid=5
  
  You may need to type or paste the complete address into your Web
  browser.
  

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 PORTA

• Fixed component ID

  5724E7699

Applicable component levels

• R610 PSY

     UP

• R615 PSY

     UP

• R61C PSY

     UP