errno 129 (ENETRESET): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Network dropped connection because

Could be also:
Constant	Type	OS
ERROR_CHILD_NOT_COMPLETE	Win32 error	Windows
ENOTSUP	errno	Windows
SPIN_LOCK_INIT_FAILURE	BugCheck Code	Windows

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ENOTSOCK	ENOTSUP

ENETRESET

Network reset invalidated connection state

ENETRESET is distinct from a peer-issued ECONNRESET. Solaris describes it as the network dropping the connection because of reset and gives the case where the connected host crashes and reboots. Existing network/connection state can no longer be relied upon.

The exact transport and observation point still matter. A higher-level retry loop should not flatten ENETRESET, ECONNRESET, and ENETDOWN into one reason if operators need to correlate host restart, network-provider reset, or peer protocol behavior.

Recovery and correlation

Correlate the errno with peer reboot/startup records and local network-provider events.
Discard assumptions tied to the lost connection and establish a new transport endpoint before resuming connection-oriented traffic.
For application retries, decide whether the interrupted request can safely be replayed rather than assuming reset means no remote processing occurred.

References

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