There is a folder on the primary server hub that continues to grow:
It is currently 27GB.
The qos_processor_backup_rm was a queue with nothing attached to it.
The directory continued to grow until the root partition ran out of space.
The directory was a left over from a year earlier to debug an issue and was never deleted.
Using the hub console, open the hub configuration and look at the "Status" tab.
Look for any queues that are not draining (a large count in the thousands or more in the "Queued" column).
Identify the the queue is needed or it was created in error. Identify if it is listening to the same subject as other existing queues that are draining.
Delete the queue if it is not needed.
Product documentation on hub queues: