Veeam addressed multiple overflow conditions in versions 12.0.0.1420 P20230718 and later. Specifically, they patched the 64-bit to 32-bit casting error in the Merge process (Case #06032451).
Run this SQL query on Veeam’s configuration database: veeam backup and replication overflow error
Error: Overflow. Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. Veeam addressed multiple overflow conditions in versions 12
During replication, Veeam tracks VM disk sectors changed since last sync. If the change tracking bitmap exceeds its allocated memory buffer (especially with thin-provisioned disks > 64TB), an overflow occurs. Unable to read data from the transport connection:
: Switching the snapshot type from "stretch" (default) to "common" with specific min/max reserved sizes can sometimes stabilize the job.
These errors typically appear in the Veeam UI or logs and are often related to the underlying SQL database failing to process a value that exceeds its data type limits. Snapshot overflow error when backing up Ubuntu volume