IJ49540: POTENTIAL FOR RESOURCE LEAK WHEN USING RDMA

APAR status

• Closed as program error.

Error description

• When a RDMA connection to a remote node has to be shutdown due
  to network errors (e.g. network link goes down) it can sometimes
  happen that the affected RDMA connection will not be closed and
  all resources assigned to this RDMA connection (memory, VERBS
  Queue Pair, ...) are not freed.
  

Local fix

Problem summary

• When a RDMA connection to a remote node has to be shutdown due
  to network errors (e.g. network link goes down) it can sometimes
  happen that the affected RDMA connection will not be closed and
  all resources assigned to this RDMA connection (memory, VERBS
  Queue Pair, ...) are not freed.
  

Problem conclusion

• This problem is fixed in 5.1.2.15
  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:
  Fixed code so that the resource leak can no longer happen.
  
  Work around:
  No work around available.
  
  Problem trigger:
  verbsRdmaSend must be enabled. Loss of a RDMA connection to a
  node because of network errors in the RDMA fabric.
  
  Symptom:
  Unexpected Results/Behavior
  
  Platforms affected:
  ALL Linux OS environments
  
  Functional Area affected:
  RDMA
  
  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