FreeBSD 13 NFS Mount Returns Stale File Handle After Backend Move

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Applications lose access to mounted paths and fail I/O operations.

Environment & Reproduction

Usually appears after dataset relocation or export recreation.

ls -lah /mnt/share

Root Cause Analysis

Client cache references old inode/filehandle namespace no longer exported.

Quick Triage

Check server export state and client mount options.

showmount -e 

Step-by-Step Diagnosis

Compare live exports with fstab and automounter definitions.

cat /etc/exports && mount | grep nfs

Solution – Primary Fix

Remount affected shares after export consistency is restored.

sudo umount -f /mnt/share && sudo mount -a -t nfs

Solution – Alternative Approaches

Use versioned export paths to avoid handle invalidation during moves.

Verification & Acceptance Criteria

Read/write operations succeed and stale handle errors stop.

Rollback Plan

Revert export path changes and remount clients.

Prevention & Hardening

Coordinate export changes with controlled client remount windows.

Related Errors & Cross-Refs

Related to lockd state loss and automount cache drift.

Related tutorial: View the step-by-step tutorial for freebsd-13.

View all freebsd-13 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

NFS export lifecycle and client caching behavior references.