The Replication Agent shut down if it lost its connection to the target server when processing a checkpoint entry. The following message was logged to ctreplagent.log:
Failed to update replication agent state on data target: 127
When processing a checkpoint entry that it read from the source server, the Replication Agent attempted to update its current position on the target server. Because the target server had shut down, the Replication Agent terminated. The Replication Agent has been modified to detect the loss of connection and reconnect, which corrects this issue.