Cache Task giving permissions error

Question
Type: Release Pipeline

Enter Task Name: Cache Task

Environment

• Server - Azure Pipelines ?

Issue Description

In my extension, I am downloading an executable everytime a pipeline runs. So, to avoid that I thought of using the Cache task. I defined my task as follows:

`steps:

• task: Cache@2 displayName: Cache inputs: key: 'twsictli | $(Agent.OS) ’ path: ‘twistcli-scan’ cacheHitVar: ‘TWISTCLI_RETRIEVED’ continueOnError: true`

And in my extension code I plan to check the value of ‘TWISTCLI_RETRIEVED’ to decide whether or not to download the executable. If its true, then no need to download.

But when the cache task executes, I am getting the following exception: 2020-12-02T01:21:47.4794368Z ##[error]Access Denied: Microsoft.TeamFoundation.ServiceIdentity;52867c9c-da85-4427-87e5-f4ea13da51a4:Build:ac4ff7ab-7c76-49ef-b741-04be121ffb0b needs the following permission(s) on the resource $ to perform this action: Read pipeline cache entries I couldn’t find any related permissions. Pls suggest.

[sdipesh]

In Azure DevOps, you have to create a yml pipeline and use the cache task within the pipeline. It works in yml pipelines but not classic pipelines.

[ngarg-panw]

@sdipesh Can you pls elaborate more. What other type of release pipeline do I need to create to take advantage of cache task?