cache_error

Property Manager name: Cache HTTP Error Responses
Behavior version: The v2024-02-12 rule format supports the cache_error behavior v1.1.
Rule format status: GA, stable
Access: Read/Write
Allowed in includes: Yes

Caches the origin's error responses to decrease server load. Applies for 10 seconds by default to the following HTTP codes: 204, 305, 404, 405, 501, 502, 503, 504, and 505.

This behavior no longer caches 400 error responses from the origin server. If you need to cache such errors, you can set up a custom variable. See Caching 400 responses for more information.

Option Type Description Requires

Option	Type	Description
`enabled`	boolean	Activates the error-caching behavior.	{"displayType":"boolean","tag":"input","type":"checkbox"}
`ttl`	string (duration)	Overrides the default caching duration of `10s`. Note that if set to `0`, it is equivalent to `no-cache`, which forces revalidation and may cause a traffic spike. This can be counterproductive when, for example, the origin is producing an error code of `500`.	{"displayType":"string","tag":"input","type":"text"} {"if":{"attribute":"enabled","op":"eq","value":true}}
`preserve_stale`	boolean	When enabled, the edge server preserves stale cached objects when the origin returns `500`, `502`, `503`, and `504` error codes. This avoids re-fetching and re-caching content after transient errors.	{"displayType":"boolean","tag":"input","type":"checkbox"} {"if":{"attribute":"enabled","op":"eq","value":true}}

enabled

boolean

Activates the error-caching behavior.

{"displayType":"boolean","tag":"input","type":"checkbox"}

ttl

string (duration)

Overrides the default caching duration of 10s. Note that if set to 0, it is equivalent to no-cache, which forces revalidation and may cause a traffic spike. This can be counterproductive when, for example, the origin is producing an error code of 500.

{"displayType":"string","tag":"input","type":"text"}

{"if":{"attribute":"enabled","op":"eq","value":true}}

preserve_stale

boolean

When enabled, the edge server preserves stale cached objects when the origin returns 500, 502, 503, and 504 error codes. This avoids re-fetching and re-caching content after transient errors.

{"displayType":"boolean","tag":"input","type":"checkbox"}

{"if":{"attribute":"enabled","op":"eq","value":true}}