IJ51704: RECOVERY ON IW FILESET WITH AFMRECOVERYUSEFSET RESULTS IN DEADLOCK

APAR status

• Closed as program error.

Error description

• Triggering recovery on IW fileset (by running ls -l on root of
  fileset), with afmIOFlag afmRecoveryUseFset set on it causes a
  deadlock - which resolves itself almost after 10 minutes (300
  retries of queueing ofGetattr for the ls command).
  

Local fix

• Don't trigger recovery on IW fileset using "ls -l" on the
  fileset. Instead use the makeActive subcommand in the mmafmctl.
  

Problem summary

• Triggering recovery on IW fileset (by running ls -l on root of
  fileset), with afmIOFlag afmRecoveryUseFset set on it causes a
  deadlock - which resolves itself almost after 10 minutes (300
  retries of queueing ofGetattr for the ls command).
  

Problem conclusion

• This problem is fixed in 5.1.9.5
  To see all Spectrum Scale APARs and their respective
  Fix solutions refer to page: 
  https://public.dhe.ibm.com/storage/spectrumscale/spectrum_scale
  _apars.html
  
  Benefits of the solution:
  Avoid the deadlock IW filesets where recovery files are being
  redirected within the fileset itself instead of /var
  
  Work Around:
  Don't trigger recovery on IW fileset using "ls -l" on the
  fileset. Instead use the makeActive subcommand in the mmafmctl.
  
  Problem trigger:
  Triggering Recovery on the fileset using ls -l.
  
  Symptom:
  Deadlock
  
  Platforms affected:
  Linux Only
  
  Functional Area affected:
  AFM
  
  Customer Impact:
  High Importance
  

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

  SPEC SCALE STD

• Fixed component ID

  5737F33AP

Applicable component levels