AWS error

NOT_CONVERGING (Not converging)

MGN replication backlog keeps growing because data is written to the source faster than it can be sent.

Checked 4 Nov 2026Official source linked
NOT_CONVERGING (Not converging)

MGN replication backlog keeps growing because data is written to the source faster than it can be sent.

Why it happens

The source server's write rate is higher than the replication throughput, so the backlog never clears.

How to fix it

  1. 1

    Step 1

    Work out the bandwidth you need and confirm the network can provide it.

  2. 2

    Step 2

    Check the performance of the replication server's EBS volumes. Change the volume type in the MGN console under the source server's Disk settings tab if needed.

  3. 3

    Step 3

    Check CPU and memory use on the source server.

Source

Full guide: How to migrate VMware and physical servers to AWS →