AuthorizationPermissionMismatch Error in Azure Data Lake Storage
The error states that the authentication worked, but the service principal doesn't have the right permissions on the storage account — here's how to fix it.
AuthorizationPermissionMismatch Error in Azure Data Lake Storage
The error states that the authentication worked, but the service principal doesn't have the right permissions on the storage account — here's how to fix it.
1. What does this error mean?
When your integration writes to Azure Data Lake Storage (ADLS) and you see:
com.azure.storage.file.datalake.models.DataLakeStorageException
Status code 403, "error": { "code": "AuthorizationPermissionMismatch" }
…it means authentication succeeded (your credentials are valid) but the service principal does not have permission to perform the requested operation on that specific resource.
⚠ Do not confuse this with 'Signature did not match' — that is a different error. AuthorizationPermissionMismatch is purely a permissions/RBAC problem, not a credentials problem.
2. Most Common Root cause
The most frequent cause when multiple integrations share the same storage account but have different keyPrefixes:
✅ Each integration can be configured with a different Client ID (service principal / app registration). If that Client ID has not been granted the Storage Blob Data Contributor role on the storage account, every write will fail with 403.
Even though the storage account name, container, and tenant ID look identical across integrations, a different clientId means a completely different identity in Azure AD — and it needs its own role assignment.
3. Step by Step Troubleshooting guide
Step 1 — Identify the failing integration's Client ID
Find the integration config (AzureDataLake.props or equivalent). Note the exact value of:
- AzureDataLake.props.clientId
- AzureDataLake.props.accountName
- AzureDataLake.props.containerName
Compare these against a working integration. Even a single character difference in clientId points to a different service principal.
Step 2 — Check role assignments in Azure Portal
- Go to portal.azure.com
- Navigate to the Storage Account (e.g., your-storage-account)
- Click Access Control (IAM) in the left sidebar
- Click the Role assignments tab
- Search for the failing Client ID or app name
- Check if Storage Blob Data Contributor is listed with Scope = This resource (or higher)
If the Client ID does not appear at all, that is your problem — proceed to Step 3.
Step 3 — Add the missing role assignment
- On the Access Control (IAM) page, click + Add → Add role assignment
- Role: select Storage Blob Data Contributor
- Members: select 'User, group, or service principal' → search by the Client ID or app name
- Assign access to: Service principal
- Click Review + assign
Role assignments propagate within a few minutes. Retry the integration after ~5 minutes.
Step 4 — Verify Hierarchical Namespace (HNS) is not enabled
If the storage account has HNS (ADLS Gen2) enabled, directory-level ACLs also apply. Check:
- Go to the Storage Account → Overview
- Look for Hierarchical namespace in the properties panel
- If Enabled: also verify the service principal has ACL permissions on each keyPrefix directory (Storage browser → Switch to Microsoft Entra → right-click directory → Manage ACL)
- If Disabled: RBAC alone controls access — no ACL check needed
4. Quick Diagnosis Checklist
Check |
What to verify |
Same Client ID? |
Compare clientId across working vs failing integrations — they must match or each must have its own role assignment |
Same storage account? |
Verify accountName is identical across integrations |
Same container? |
Verify containerName is identical across integrations |
Role assigned? |
Storage Blob Data Contributor must appear in IAM → Role assignments for the failing Client ID |
Role scope? |
Scope should be 'This resource' (storage account level) or higher |
HNS enabled? |
If yes, also check directory-level ACLs for the keyPrefix path |
5. Things That Are NOT the Cause
These are commonly suspected but are NOT the cause of AuthorizationPermissionMismatch (403):
- Different keyPrefix values — keyPrefix is just a path, it does not affect RBAC permissions
- Client secret mismatch — a wrong secret causes AuthenticationFailed (401), not 403
- Tenant ID mismatch — wrong tenant also causes 401, not 403
- 'Signature did not match' troubleshooting steps — those apply to a different error