CPM may fail to communicate with AWS gateways with the "timed out" error during various operations:
ERROR: run_snapshots(.\cpmagent\agent.py:1462) snapshot of policy PolicyName, volume: vol-0123456789abcdef failed (independent). Reason: timed out
ERROR: wait_for_snapshots(.\cpmagent\agent.py:514) ec2, Policy 4, error in 'get_all_snapshots()': timed out
ERROR: run_snapshots(.\cpmagent\agent.py:1179) (instance: i-0123456789abcdef) could not get object from aws. Reason: timed out Exception: timed out
ERROR: handle_boto3_error_exception(.\common\aws_utils.py:514) Unknown Exception: 'NoneType' object has no attribute '__getitem__' (original: HTTPSConnectionPool(host='ec2.us-west-1.amazonaws.com', port=443): Max retries exceeded with url: / (Caused by ConnectTimeoutError(<botocore.awsrequest.AWSHTTPSConnection object at 0x7fc0e3d37350>, 'Connection to ec2.us-west-1.amazonaws.com timed out. (connect timeout=60)')))
ERROR: delete_all_snapshots_of_a_backup_record(.\cpmserver\cpm\aws_utils.py:432) Failed to delete snapshot snap-abcdef0123456789 (policy PolicyName), delete operation failed. Reason: timed out (error: None)
This is an indication that CPM instance can't reliably communicate with AWS gateways, most likely due to a slow/misconfigured proxy/firewall/NAT gateway etc. For troubleshooting purposes, you may switch to a direct connection - CPM will be able to operate normally.