CONAP-302811：在启用了回写的FlexCache的情况下、发现FlexCache锁定延迟

问题描述

On the cache of a Write-Back enabled Flexcache, If the file is not closed, then the read comes in with the stateid used for write and it works. If the file is closed, then the read comes in with the request for a shared read lock and that results in the cache going to the origin for a retrieve.