We have a customer with a strange issue. We have setup a integration that uses FILE_READER to read the files into IFS. The environment is a cluster configuration on-prem that has two application servers that are loadbalanced by netscaler.

The issue is that sometimes the file gets stuck in the /IN catalog on the application server like the FILE_READER does not detect it. In our troubleshooting we have noticed that when we put two files simultaneously on each of the appserver only one file gets picked up by the FILE_READER. After about 30 min the other file on the appserver gets also picked up. 

Conclusion is that it seems like FILE_READER is only initiating on one of the application servers at a time which causes delays for files being read by the FILE_READER. However there are no errors what so ever in the connectserver logs. 

Has someone else experienced this type of issue?