IJ36563: DEADLOCK WHEN A AFM COS (HPT) ENABLED FILESET IS PRESENT IN A FILE SYSTEM WITH ACTIVE IO.

APAR status

• Closed as program error.

Error description

• When AFM COS replication is happening on any one
  of the filesets in the File system, if there is any other
  fileset that is attempting to link/unlink or create/delete
  a snapshot, then there can be a deadlock.
  

Local fix

Problem summary

• When AFM COS replication is happening on any one
  of the filesets in the File system, if there is any other
  fileset that is attempting to link/unlink or create/delete
  a snapshot, then there can be a deadlock.
  

Problem conclusion

• This problem is fixed in 5.1.2  PTF 2
  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 deadlock from AFM COS replicating filesets with
  any other fileset in the Filesystem.
  
  Work around:
  None available.
  
  Problem trigger:
  Create/delete snapshot on a fileset or link/unlink a fileset on
  a file system where one or more AFM COS filesets are
  replicating to the remote COS site.
  
  Symptom:
  Deadlock
  
  Platforms affected:
  All Linux OS Environments (serving as AFM Gateway nodes)
  
  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