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** [tickets:#1751] PLM: handle isolation failures**
**Status:** accepted
**Milestone:** 4.6.2
**Created:** Tue Apr 12, 2016 07:05 PM UTC by Alex Jones
**Last Updated:** Tue Apr 12, 2016 07:05 PM UTC
**Owner:** Alex Jones
In ATCA architectures the PICMG 3.0 spec states that for non-recoverable
temperature sensor assertions, the shelf manager will automatically shut down
the FRU. This shows up as an "extraction pending" request from HPI. The PLM
implementation cannot currently differentiate between the shelf manager
bringing the FRU down, and the operator attempting an extraction by manual
extraction. Both of these initiate the deactivation policy.
The shelf manager automatically shutting down the FRU, in this case, can cause
HE isolation to fail because the FRU has already begun shutting down when the
readiness impact call is made. In this case the deactivation request will
fail. The code needs to handle the isolation failure and return TRY_AGAIN in
this case.
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