plungins-cache folder

[mpem]

Hi,

I am using the Atlassian Docker image to run Confluence atlassian/confluence-server:7.3.2 and I have configured different mount points for home directory, logs and caching directories. The home directory is automatically backup up every night. Because the plugins-cache directory is mounted as volume, when confluence starts up it tries to remove it but fails so it creates a plugin-cache-1586337497647 which is in the home directory and gets automatically backed up. 

-v /var/cache/containers/confluence/plugins-cache:/var/atlassian/application-data/confluence/plugins-cache:rw 

atlassian-confluence.log:2020-04-08 11:18:17,647 ERROR [Catalina-utility-1] [atlassian.confluence.plugin.DatabasePluginScanner] initWorkDir Couldn't remove plugin working directory: /var/atlassian/application-data/confluence/plugins-cache New plugin directory is: /var/atlassian/application-data/confluence/plugin-cache-1586337497647

Is there a way to delete the contents of the folder or to specify a custom path where the plugins-cache folder is located?