What does errno 46 (ENOLCK) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Solaris could not allocate another record-lock entry.

Could be also:
Constant	Type	OS
KERN_NOT_SUPPORTED	Kern return	Mac
ippStsNoAntialiasing	Intel Ipp Status	Any
EL3HLT	errno	Linux
EPFNOSUPPORT	errno	Mac
DATA_BUS_ERROR	BugCheck Code	Windows

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ENOLCK

Record-lock table exhaustion

On Solaris, ENOLCK is errno value 46. The base message is No record locks available., but the useful diagnostic context is narrower than the short message: Solaris could not allocate another record-lock entry.

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

Check fcntl record-lock users and whether locks are leaked across long-lived processes.
Look at per-process and system resource controls before assuming filesystem corruption.
A retry can succeed only after other locks are released.

References

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