Missing permissions on file system for the session storage

Environment

AppMon server

Symptoms

PurePath data is not written to the session storage configured in the server settings -> Storage

Solution

Verify if the user running the AppMon server has the permissions to write to the session storage on the host. Query the total and free disk space. See Storage

Root cause

Missing permissions on file system level.

Log messages like this:

SEVERE [DiskUsageHandler] No permissions to calculate session size or available disk space of partition! Path = </PATH/TO/THE/STORAGE>: com.dynatrace.diagnostics.core.datacenter.filestore.manager.DiskUsageHandler c:314
java.lang.SecurityException: JVM returned free space = 0 and total space = 0