HTTP 409 Conflict vs 507 Insufficient Storage
HTTP 409 (Conflict) is a 4xx Client Error response, while 507 (Insufficient Storage) is a 5xx Server Error response. 409 indicates that the request conflicts with the current state of the server. Often due to concurrent modification or business rule violations. In contrast, 507 means that the server is unable to store the representation needed to complete the request (WebDAV).
Description
The request conflicts with the current state of the server. Often due to concurrent modification or business rule violations.
When You See It
When trying to create a resource that already exists, or updating a resource that was modified by another request.
How to Fix
Refresh the resource state, resolve conflicts, and retry. Use ETags for optimistic concurrency.
Description
The server is unable to store the representation needed to complete the request (WebDAV).
When You See It
When the server runs out of disk space during WebDAV operations.
How to Fix
Free up disk space on the server or increase storage capacity.
Key Differences
409 is a 4xx Client Error response, while 507 is a 5xx Server Error response.
HTTP 409: The request conflicts with the current state of the server. Often due to concurrent modification or business rule violations.
HTTP 507: The server is unable to store the representation needed to complete the request (WebDAV).
You encounter 409 when when trying to create a resource that already exists, or updating a resource that was modified by another request.
You encounter 507 when when the server runs out of disk space during WebDAV operations.
When to Use Which
For 409 (Conflict): Refresh the resource state, resolve conflicts, and retry. Use ETags for optimistic concurrency. For 507 (Insufficient Storage): Free up disk space on the server or increase storage capacity.