DY47658: LINUX FAST PATH RUNS OUT OF BUFFERS DUE TO A BUFFER LEAK

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When using Linux Fast Path (LFP) the LFP instance may run out of
  buffers quickly. Due to a buffer leak that happens under rare
  circumstances, LFP buffers may get lost, and thus are no longer
  available. When no more buffers are available LFP will try to
  allocate additional buffers up to the configured maximum size.
  When the maximum size is reached, or no more system GETVIS is
  available, then applications that are working with that LFP
  instance may encounter failing socket calls due to no more
  buffers available.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Linux Fast Path users.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: When using Linux Fast Path (LFP) the    *
  *                      LFP instance may run out of buffers     *
  *                      quickly. Due to a buffer leak that      *
  *                      happens under rare circumstances, LFP   *
  *                      buffers may get lost, and thus are no   *
  *                      longer available.                       *
  ****************************************************************
  * RECOMMENDATION: Install this PTF.                            *
  ****************************************************************
  When using Linux Fast Path (LFP) the LFP instance may run out of
  buffers quickly. Due to a buffer leak that happens under rare
  circumstances, LFP buffers may get lost, and thus are no longer
  available. When no more buffers are available LFP will try to
  allocate additional buffers up to the configured maximum size.
  When the maximum size is reached, or no more system GETVIS is
  available, then applications that are working with that LFP
  instance may encounter failing socket calls due to no more
  buffers available.
  

Problem conclusion

• The LFP code has been corrected to avoid buffer leaks.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

  DY47656

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

  UD54173

Modules/Macros

• IJBLFPEM IJBLFPEZ IJBLFPLE IJBLFPLX IJBLFPUH IJBLFPUT IJBOBSDI
  IJBOBUFB IJBOBUFM IJBODEV  IJBODEVB IJBOENTR IJBOOFFL IJBOSOCB
  IJBOSOCK
  

Fix information

• Fixed component name

  VSE/AF SVR/BAM

• Fixed component ID

  5686VS606

Applicable component levels

• R61C PSY UD54173

     UP16/04/12 I 1000

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.