IJ28314: DECLUSTERED ARRAY STUCK IN-TRANSITION WITH LONG WAITERS.

APAR status

• Closed as program error.

Error description

• In a distributed Spectrum Scale environment in
  the presence of repetitive node failures can result in
  the declustered array becoming stuck in-transition
  with long waiters. Long waiters may occur, and file
  system operations may become stalled.
  

Local fix

• Restart the daemon
  

Problem summary

• In a distributed Spectrum Scale environment in
  the presence of repetitive node failures can result in
  the declustered array becoming stuck in-transition
  with long waiters. Long waiters may occur, and file
  system operations may become stalled.
  

Problem conclusion

• Benefits of the solution:
  No more deadlocks
  
  Work around:
  Restart the daemon
  
  Problem trigger:
  Occurs in Spectrum Scale RAID configurations involving
  multiple log groups, such as Spectrum Scale Erasure
  Code Edition or ESS 3000, that experience repetitive node
  shutdowns or network partitioning affecting a small subset
  of nodes in the cluster.
  
  Symptom:
  Hang/Deadlock/Unresponsiveness/Long Waiters
  
  Platforms affected:
  Linux Only
  
  Functional Area affected:  ESS/GNR
  
  Customer Impact: Suggested
  

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