- 
    Bug 
- 
    Resolution: Done
- 
    P2: Important 
- 
    5.0.0
- 
    None
The cache is cleaned so that its size is under the maximum cache size.
QNetworkDiskCache::expire() do that.
When the caches is deleted, the open files are deleted without closing action. Therefore. The file descriptor is remaining until the process is terminated.