oscap prints "E: oscap: Failed to check available memory" message multiple times on RHEL 8.6

Issue

• Executing the oscap rule which is computing a lot of items for example below rule to scan for unowned files by user , we can see the following error message appearing multiple times:

  # oscap xccdf eval --profile xccdf_org.ssgproject.content_profile_stig --rule xccdf_org.ssgproject.content_rule_no_files_unowned_by_user /usr/share/xml/scap/ssg/content/ssg-rhel8-ds.xml
  [...]
  --- Starting Evaluation ---
  
  Title   Ensure All Files Are Owned by a User
  Rule    xccdf_org.ssgproject.content_rule_no_files_unowned_by_user
  Ident   CCE-83499-4
  E: oscap:     Failed to check available memory
  E: oscap:     Failed to check available memory
     :
     :
  E: oscap:     Failed to check available memory
  E: oscap:     Failed to check available memory
  Result  fail
  

• Issue is seen only on some environment and is not reliably reproduced on every environment.