Connection stalls after a certain number of inserts

[ChristophGehbauer]

Hi,
I'm working at the Lawrence Berkeley Lab and we want to use an already setup instance of BTrDB here at the lab (the database is already setup from PSL). We're adding about 2 years of historic data in a 1 second timestep. We insert one day at a time. However after 407 days the context.insertValues(....) stalls. Even after several hours the function does not return. It does this when sync = True or False. Deleting all data and starting the process again stalls again at 407 days.
Do you have any advise what we could do/test?
Thanks!
Christoph