Oracle application crashes when a single path in multipath fails

Solution Verified - Updated -

Issue

  • Oracle application crashes when a single path in multipath fails. The application should be unaware of underlying path failures.
  • ASM crashed and with that the Oracle DB
  • Using Device Mapper Multipathing for Oracle database, and expect Oracle LUNs to see multipath, not sd devices?
  • How to make sure Oracle ASM devices pointing to multipath devices and not scsi paths, sd devices when using ASMLib to manage ASM disks?
  • I/O's to the SAN are not shared across all the paths of multipath in Oracle application server configured with Oracleasm.

Environment

  • Red Hat Enterprise Linux (RHEL) 5, 6, 7
  • device-mapper-multipath
  • Oracle ASM

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