What does errno 47 (ECANCELED) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: a Solaris asynchronous operation was canceled before completion.

Could be also:
Constant	Type	OS
KERN_NODE_DOWN	Kern return	Mac
ippStsRepetitiveSrcData	Intel Ipp Status	Any
EL3RST	errno	Linux
EAFNOSUPPORT	errno	Mac
INSTRUCTION_BUS_ERROR	BugCheck Code	Windows

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EAFNOSUPPORT	ELNRNG

ECANCELED

Canceled asynchronous operation

On Solaris, ECANCELED is errno value 47. The base message is Operation canceled, but the useful diagnostic context is narrower than the short message: a Solaris asynchronous operation was canceled before completion.

Use the Solaris-specific errno table first, then compare with POSIX only for portable behavior. Some Solaris values share names with other UNIX systems but have different numbers or more specific historical meanings.

What to check

Identify the async subsystem: POSIX AIO, timer, cancellation, or another queued operation.
Distinguish explicit cancellation from timeout and transport failure.
Do not reuse buffers or descriptors until the completion path is fully accounted for.

References

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