9 hubs, 5 C4, 4 C7.
All hubmesh'ed together.
Updated to 2.3.4.134 in hopes of curing severe loads and reboots.
2 C4 did not respond well, 500 errors and corrupted database.
Moved the problimatic hubs back to 2.3.4.123, they had been running well.
Restored database to the backup taken at last upgrade.
These 2 are doing the same thing, 500 errors and corrupt database, even having rolled back.
Start with one of the problematic C7 hubs. Backup current db to PC (settings>>backup and restore>>download button at bottom) Goto yourhubip:8081 and do a soft reset. When it comes back up, restore with the file you downloaded to your pc. Shut down hub after restore. Unplug hub at wall for 5 mins then power back up. Now to upgrade. It's bringing something corrupt over., This way you've cleaned your database and radios.