What does errno 82 (EREMCHG) mean?

EREMCHG

EREMCHG is Solaris errno value 82, Remote address changed. The Solaris intro(2) errno catalog preserves the name but does not provide a triggering system call or a more detailed modern protocol scenario. That absence is important: the value should not be automatically interpreted as DHCP renewal, TCP peer migration, or DNS change.

Use the producer of the errno as the primary clue

Record the exact interface that failed, the remote-resource or endpoint identity known before the call, and any address or name mapping returned by the subsystem afterward. Older System V networking and remote-service code retained errno values that can be surfaced by compatibility layers even when a current application no longer uses the original facility directly.

If a contemporary library returns this result, inspect its source or documentation for the condition it maps to this value. Avoid a generic reconnect loop until the implementation confirms that retrying against the new remote address is valid. The current Oracle catalog and illumos header establish the Solaris errno identity, but they do not define a universal recovery sequence.

References

• Oracle Solaris intro(2): EREMCHG
• illumos errno.h: EREMCHG
• POSIX Issue 8 errno.h

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