RHEL 8 System hangs during cable pull test with QLogic QLE2742 HBA

Solution Verified - Updated -

Issue

  • In a RHEL 8.0 , system go to hung state after pulling one of two fibre channel cables connecting qla2xxx HBAs to storage
  • During a multipath test, not all I/O would fail over after pulling one of two fibre channel cables connecting qla2xxx HBAs to storage. Some I/Os would become stuck in the request queues of the unreachable scsi device paths.
  • /var/log/messages had a series of following messages
      kernel: INFO: task xfsaild/dm-10:1880 blocked for more than 120 seconds.

Environment

  • Red Hat Enterprise Linux 8.0
    • 4.18.0-80.el8.x86_64
  • Direct point-to point connect with Qlogic QLE2742 and Storage

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