During the normal work of the Collect Tasks, they don't show any error, but it's possible to see a slow inventory processing or even no processing at all.
A temporarily solution is to clean/recreate ServerDB folder on the affected Scalability Server, but after some time, the issue will be present again.
Client Automation 14.x
Checking the content of COLLECT folder, multiple Inventory Files are being received for the same machine, but with a difference of few minutes:
This behavior is caused because of a policy enabled called "Collect Full inventory after specified number of agent runs", located under:
DSM -> Agent -> Asset Management
The default value is 0, which means that this will never happen, but if this policy has any small number (like "1"), it will cause that after every execution of the Agent, a full Collect will be done, causing that each Agent will send all inventory files each time (instead of just a delta), causing a queuing of them in the Scalability Server, since it won't be able to process that amount of received files.