PM19077: exclusive lock on link module while clearing suspicion prevents further clearing by other users

APAR status

• Closed as program error.

Error description

• Problem
  When link suspicion is cleared an exclusive lock is taken on the
   link module involved, and is not released until the formal modu
  le is closed. This prevents other users from clearing suspect li
  nks which use the same link module.
  
  There are actually 2 slightly different scenarios here, the firs
  t clearing of suspicion, and then subsequent clearings. On the f
  irst clear a new attribute is created in the link module, this m
  eans that when the formal module closes, you are asked if you wi
  sh to save the link module. After subsequent clear operations, w
  hen closing the formal module, you are not asked to save the lin
  k module.
  
  I'd prefer to see the link module automatically closed in each c
  ase, even if that requires a save of the link module without use
  r interaction (perhaps these attributes should be created in lin
  k modules by default?).
  
  To Reproduce
   - create formal modules 'SRD', 'test1' and 'test2'
   - create a few objects in each, giving them some heading text
   - create links from SRD to test1, and from SRD to test2
   - modify the text in each linked object in SRD in order to make
   the links suspect
   - if necessary add suspect link columns to each to test module
  to verify the suspicion is in place
   - open each test module as a different user
   - in test1 clear all suspicion
   - in test2 (as the other user) attempt to clear all suspicion
  
  This will fail since the first user has an exclusive lock on the
   link module.
  
  Possible Workarounds
  Once the first user has closed the formal module, the second use
  r will be able to clear further suspicion.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When link suspicion is cleared an exclusive lock is taken on
  the link module involved, and is not released until the
  formal module is closed. This prevents other users from
  clearing suspect links which use the same link module.
  

Problem conclusion

• The code has been changed so that other users can now clear
  suspect links in the above scenario
  

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

  TLOGIC DOORS

• Fixed component ID

  5724V61DR

Applicable component levels

• R910 PSN

     UP