Anticipated Hardware Failure; Transient Interrupts; C.3.1 Transient Interrupts - Sun Microsystems Netra CT Service Manual

Cause
Full hot swap was enabled on the system.
Action
No action is necessary.
C.3

Anticipated Hardware Failure

C.3.1

Transient Interrupts

Message
Interrupt Level 4--Not serviced
Cause
Such a message occuring intermittently is always a result of the underlying
hardware doing something unpredictable.
Transient interrupts occur when, for example, a fan is starting to fail, and it fails long
enough to generate an interrupt and then resumes operation. By the time the fan
driver is queried, it denies the interruption because now it is functioning normally.
Action
The condition is a result of the architecture of interrupt generation and response. As
long as the generating hardware has resumed normal operation, no further action is
required.
Appendix C Error Messages C-9