CallerReference (string) – [REQUIRED]
A value that you specify to uniquely identify an invalidation request. CloudFront uses the value to prevent you from accidentally resubmitting an identical request. Whenever you create a new invalidation request, you must specify a new value for CallerReference
and change other values in the request as applicable. One way to ensure that the value of CallerReference
is unique is to use a timestamp
, for example, 20120301090000
.
If you make a second invalidation request with the same value for CallerReference
, and if the rest of the request is the same, CloudFront doesn’t create a new invalidation request. Instead, CloudFront returns information about the invalidation request that you previously created with the same CallerReference
.
If CallerReference
is a value you already sent in a previous invalidation batch request but the content of any Path
is different from the original request, CloudFront returns an InvalidationBatchAlreadyExists
error.
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