LeaseIdMissing
Azure Blob service returns `LeaseIdMissing` when an operation requiring an active lease ID is sent without that lease header.
Last reviewed: February 2, 2026|Editorial standard: source-backed technical guidance
What Does Lease ID Missing Mean?
Write/delete operations on leased blobs are rejected until callers provide the correct lease token for the protected resource.
Common Causes
- -Blob has an active lease and request omits the required
x-ms-lease-idheader. - -Client code path is not lease-aware and strips lease metadata on mutating operations.
- -Workflow changed lease ownership but downstream workers still use old assumptions.
- -Concurrent processes issue writes/deletes without shared lease-token coordination.
How to Fix Lease ID Missing
- 1Read current lease state and include valid
x-ms-lease-idin required requests. - 2Renew, release, or break lease explicitly when operation ownership changes.
- 3Enforce single-writer lease coordination for leased blob mutation paths.
- 4Fail fast in client code when lease-required operations are attempted without token.
Step-by-Step Diagnosis for Lease ID Missing
- 1Capture failing request headers and response with
x-ms-request-idfor correlation. - 2Verify blob lease status and lease owner workflow at failure timestamp.
- 3Inspect SDK/middleware pipeline to ensure lease headers survive retries/proxy hops.
- 4Replay operation with explicit lease token using minimal client to isolate app logic drift.
Lease State and Header Integrity
- -Check lease mode and duration before mutation (example: blob is under active infinite lease but request omits
x-ms-lease-id). - -Trace outbound request transformation (example: custom HTTP interceptor drops lease header on retry path).
Concurrency and Ownership Coordination
- -Map lease ownership handoff across services (example: uploader acquires lease, cleanup worker deletes blob without receiving lease token).
- -Audit race windows around lease renew/release (example: lease rotated but workers still hold old token in cache).
How to Verify the Fix
- -Retry affected operation and confirm
LeaseIdMissingno longer appears. - -Validate lease-protected write/delete flows succeed with expected ownership constraints.
- -Monitor storage logs to ensure lease-related failures drop after rollout.
How to Prevent Recurrence
- -Centralize lease handling in shared storage client utilities.
- -Require explicit lease-token contracts between producer and mutation workers.
- -Add automated tests for lease-required operations under concurrent write scenarios.
Pro Tip
- -annotate queue messages with lease metadata and expiry hints so workers can validate token freshness before executing writes.
Decision Support
Compare Guide
403 Forbidden vs 404 Not Found: When to Hide Resources
Use 403 for explicit access denial, or 404 to conceal resource existence when security policy requires reducing endpoint and object enumeration risk.
Compare Guide
404 Not Found vs 410 Gone: Missing vs Permanent Removal
Learn when to return 404 (missing or temporary absence) versus 410 (intentional permanent removal), including redirect and cache implications.
Playbook
Resource State Playbook (404 / 410 / ResourceNotFound)
Use this playbook to separate temporary missing-resource lookups from permanent removals, then fix scope, lifecycle, and identifier drift safely.
Official References
Provider Context
This guidance is specific to Azure services. Always validate implementation details against official provider documentation before deploying to production.