RHEV storage domain extension executed twice resulting in an inactive storage domain and extraneous "unknown device" PVs

Solution Unverified - Updated -

Issue

  • The sequence of UpdateStorageDomainCommand/ConnectAllHostsToLunCommand/ExtendSANStorageDomainCommand was executed twice concurrently by RHEV-M for the same request to extend a storage domain.

  • As a result, the block-based Storage Domain ended up with extraneous unknown device PVs, which caused the Storage Domain to become inactive.

Environment

  • Red Hat Enterprise Virtulization (RHEV) 3.5
  • Red Hat Enterprise Virtulization Hypervisor (RHEV-H) 6.6 20150512.0

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