The XCOM Gateway Directory/File Watcher process for a policy is stopped and onward files are not being processed. In order to process the onward files the Directory/File Watcher for the policy has to be started manually. There are no messages in any of the Gateway logs.
The policy Directory/File Watcher are stopped when you have multiple XCOM Gateway servers accessing the same Gateway database.
Release : 12.0
Component : CA XCOM DATA TRANSPORT GATEWAY FOR WINDOWS
It is not recommended that a IBM DB2/MySQL database be shared by multiple XCOM Gateway servers. This will cause the Gateway servers to stop the policy's Directory/File Watcher. Each XCOM Gateway server should have its own unique database.