PK58045: MSBS NOT GETTING FREED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A storage leak is occurring with an MSB (Mutex Status Block).
  The 128-byte MSBs are not getting freed in the users HANC,
  causing progressive storage growth in Sp2 Key8 storage.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of C/C++ multithreaded applications    *
  *                 that use the freopen() function specifying   *
  *                 an empty string for the filename parameter.  *
  ****************************************************************
  * PROBLEM DESCRIPTION: When a file is opened in a              *
  *                      multithreaded environment a mutex is    *
  *                      assigned to the file and represented    *
  *                      by an MSB control block. When the       *
  *                      freopen() function is invoked with      *
  *                      an empty string specified for the       *
  *                      filename, a new MSB control block is    *
  *                      obtained and the original MSB control   *
  *                      block is not freed causing a storage    *
  *                      leak.                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  See problem description.
  

Problem conclusion

• The freopen() flow was corrected to free the MSB control
  blocks at the appropriate time.
  

Temporary fix

Comments

• ×**** PE10/05/28 FIX IN ERROR. SEE APAR PM13172  FOR DESCRIPTION
  ×**** AE10/08/19 FIX IN ERROR. SEE APAR PM20821  FOR DESCRIPTION
  ×**** PE10/10/28 FIX IN ERROR. SEE APAR PM20821  FOR DESCRIPTION
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UK35878 UK35879 UK35880 UK35881

Modules/Macros

• CELHREOP CELQREOP EDC4005D
  

Fix information

• Fixed component name

  LE C LIBRARY

• Fixed component ID

  568819805

Applicable component levels

• R720 PSY UK35878

     UP08/05/10 P F805

• R730 PSY UK35879

     UP08/05/10 P F805

• R740 PSY UK35880

     UP08/05/10 P F805

• R750 PSY UK35881

     UP08/05/29 P F805

Fix is available

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